SP207ET-L [EXAR]
Line Transceiver, 3 Func, 5 Driver, 3 Rcvr, CMOS, PDSO24, LEAD FREE, MS-013AD, SOIC-24;
| 型号： | SP207ET-L |
| 厂家： | 
EXAR CORPORATION |
| 描述： | Line Transceiver, 3 Func, 5 Driver, 3 Rcvr, CMOS, PDSO24, LEAD FREE, MS-013AD, SOIC-24 |
| 文件： | 总19页 (文件大小：1056K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SP207E–SP213E
Low Power, High ESD +5V RS-232 Transceivers
+5V INPUT
■ꢀ MeetsꢀAllꢀEIA-232ꢀandꢀITUꢀV.28ꢀ
0.1µF
6.3V
9
Specifications
10
+
0.1µF
6.3V
C1
+
VCC
11
15
+
+
0.1µF
6.3V
V +
V –
■ꢀ Singleꢀ+5VꢀSupplyꢀOperation
12
13
0.1µF
16V
+
C1
C2
–
+
■ꢀ 3mAꢀTypicalꢀStaticꢀSupplyꢀCurrent
■ꢀ 4ꢀxꢀ0.1μFꢀExternalꢀChargeꢀPumpꢀCapacitors
■ꢀ Typicalꢀ230kbpsꢀTransmissionꢀRates
■ꢀ StandardꢀSOICꢀandꢀSSOPꢀFootprints
■ꢀ 1μAꢀShutdownꢀModeꢀ(SP211Eꢀ&ꢀSP213E)
■ꢀ TwoꢀWake-UpꢀReceiversꢀ(SP213E)
■ꢀ Tri-State/RxEnableꢀ(SP211Eꢀ&ꢀSP213E)
■ꢀ ImprovedꢀESDꢀSpecifications:
0.1µF
16V
SP207E
400kΩ
14
C2
–
7
6
2
T1
T2
T3
T4
T5
T1 IN
T1 OUT
T2 OUT
T3 OUT
T4 OUT
T5 OUT
400kΩ
3
T2 IN
T3 IN
T4 IN
T5 IN
400kΩ
1
18
19
21
400kΩ
400kΩ
+ꢀ5kV Human Body Model
+ꢀ5kV IECꢀ000-4-2 Air Discharge
+8kV IECꢀ000-4-2 Contact Discharge
24
20
5
22
17
4
Now Available in Lead Free Packaging
R1
R1 OUT
R2 OUT
R3 OUT
R1 IN
R2 IN
R3 IN
Device
SP207E
SP208E
SP211E
Drivers
Receivers
Pins
24
5kΩ
23
16
R2
R3
5
4
4
3
4
5
5kΩ
24
5kΩ
28
8
GND
SP213E
4
5
28
Table ꢀ. Model Selection Table
DESCRIPTION
The SP207E-SP213E are enhanced transceivers intended for use in RS-232 and V.28 se-
rial communication. These devices feature very low power consumption and single-supply
operation making them ideal for space-constrained applications. Exar-patented (5,306,954)
on-board charge pump circuitry generates fully compliant RS-232 voltage levels using small
and inexpensive 0.ꢀµF charge pump capacitors. External +ꢀ2V and -ꢀ2V supplies are not
required. The SP211E and SP213E feature a low-power shutdown mode, which reduces
power supply drain to ꢀµA. SP213E includes two receivers that remain active during shut-
down to monitor for signal activity.
The SP207E-SP213E devices are pin-to-pin compatible with our previous SP207, SP208,
SP2ꢀꢀ and SP2ꢀ3 as well as industry-standard competitor devices. Driver output and re-
ceiver input pins are protected against ESD to over ±ꢀ5kV for both Human Body Model and
IECꢀ000-4-2 Air Discharge test methods. Data rates of over ꢀ20kbps are guaranteed with
230kbps typical, making them compatible with high speed modems and PC remote-access
applications. Receivers also incorporate hysteresis for clean reception of slow moving
signals.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com
SP207E_ꢀ00_072309
AbSOLuTE MAxIMuM RATINꢀS
These are stress ratings only and functional opera-
tion of the device at these or any other above those
indicatedꢀinꢀtheꢀoperationꢀsectionsꢀofꢀtheꢀspecifica-
tions below is not implied. Exposure to absolute
maximum rating conditions for extended periods of
time may affect reliability.
Power Dissipation Per Package
24-pinꢀSSOPꢀ(derateꢀ11.2mW/oC above +70oC)....900mW
24-pinꢀSOICꢀ(derateꢀ12.5mW/oC above +70oC)...1000mW
28-pinꢀSSOPꢀ(derateꢀ11.2mW/oC above +70oC)....900mW
28-pinꢀSOICꢀ(derateꢀ12.7mW/oC above +70oC)...1000mW
VCC ..................................................................+6V
V+ ...................................... (VCC – 0.3V) to +ꢀ3.2V
V– .................................................................ꢀ3.2V
Input Voltages
TIN ........................................ –0.3V to (V +0.3V)
RIN ...........................................................C..C....±20V
OutputꢀVoltages
TOUT ............................... (V+, +0.3V) to (V–, –0.3V)
ROUT ...................................... –0.3V to (VCC +0.3V)
Short Circuit Duration on TOUT .............Continuous
SPECIFICATIONS
VCC at nominal ratings; 0.ꢀµF charge pump capacitors; TMIN to TMAX, unless otherwise noted.
PARAMETER
TTL INPuTS
MIN.
TYP.
MAx.
0.8
uNIT
CONDITIONS
TIN, EN, SD
Logic Threshold VIL
Logic Threshold VIH
LogicꢀPull-UpꢀCurrent
Maximum Transmission Rate
TTL OuTPuTS
Compatibility
Volts
Volts
µA
2.0
ꢀ5
200
TIN = 0V
ꢀ20
230
kbps
CL = ꢀ000pF, RLꢀ=ꢀ3kΩ
TTL/CMOS
VOL
0.4
Volts
Volts
µA
IOUTꢀ=ꢀ3.2mA:ꢀVccꢀ=ꢀ+5V
VOH
3.5
IOUT = -ꢀ.0mA
Leakage Current
0.05
+/-10
0Vꢀ≤ꢀVOUTꢀ≤ꢀVcc;ꢀSP211EꢀENꢀ
= 0V; SP2ꢀ3E EN = Vcc, TA =
+25ºC
RS-232 OuTPuT
OutputꢀVoltageꢀSwing
+/-5
+/-7
Volts
All transmitter outputs loaded
withꢀ3kΩꢀtoꢀground
OutputꢀResistance
300
Ω
Vcc = 0V; VOUTꢀ=ꢀ+/-2V
OutputꢀShortꢀCircuitꢀCurrent
RS-232 INPuT
+/-25
mA
Infinite Duration, VOUT = 0V
Voltage Range
-ꢀ5
0.8
+ꢀ5
Volts
Volts
Volts
Volts
kΩ
Voltage Threshold Low
Voltage Threshold High
Hysteresis
ꢀ.2
ꢀ.7
0.5
5
Vcc = 5V, TA = +25ºC
Vcc = 5V, TA = +25ºC
Vcc = 5V
2.8
ꢀ.0
7
0.2
3
Resistance
VINꢀ=ꢀ+/-15V,ꢀTA = +25ºC
DYNAMIC CHARACTERISTICS
Driver Propagation Delay
Receiver Propagation Delay
Instantaneous Slew Rate
ꢀ.5
0.5
µs
µs
TTL to RS-232
RS-232 to TTL
ꢀ.5
30
V/µs
CL = 50pF, RLꢀ=ꢀ3-7kΩ;ꢀ
TAꢀ=ꢀ+25ºC;ꢀfromꢀ+/-3V
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com
SP207E_ꢀ00_072309
2
SPECIFICATIONS
VCC at nominal ratings; 0.ꢀµF charge pump capacitors; TMIN to TMAX, unless otherwise noted.
PARAMETER
MIN.
TYP.
MAx.
uNIT
CONDITIONS
DYNAMIC CHARACTERISTICS continued
Transition Time
ꢀ.5
µs
CL = 2500pF, RLꢀ=ꢀ3kΩ,
Measured from -3V to +3V or
+3V to -3V
OutputꢀEnableꢀTime
400
250
ns
ns
OutputꢀDisableꢀTime
POꢁER REquIREMENTS
Vcc SP207
Vcc all other parts
Icc
4.75
4.50
5.00
5.00
3
5.25
5.50
6
Volts
Volts
mA
NoꢀLoad:ꢀVccꢀ=ꢀ+/-10%,ꢀTA =
+25ºC
Icc
ꢀ5
ꢀ
mA
µA
All Transmitters RLꢀ=ꢀ3kΩ
Shutdown Current
ꢀ0
TA = +25ºC
ENVIRONMENTAL AND MECHANICAL
OperatingꢀTemperatureꢀ
Commercial, _C
Extended, _E
0
+70
+85
ºC
ºC
ºC
-40
-65
Storage Temperature
+ꢀ25
Package
_A
_T
Shrinkꢀ(SSOP)ꢀsmallꢀoutline
Wideꢀ(SOIC)ꢀsmallꢀoutline
TransmitterꢀOutputꢀ@ꢀ120kbps
RL=3KΩ,ꢀCL=ꢀ,000pF
TransmitterꢀOutputꢀ@ꢀ120kbps
RL=3KΩ,ꢀCL=2,500pF
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com
SP207E_ꢀ00_072309
3
TransmitterꢀOutputꢀ@ꢀ240kbps
TransmitterꢀOutputꢀ@ꢀ240kbps
RL=3KΩ,ꢀCL=ꢀ,000pF
RL=3KΩ,ꢀCL=2,500pF
PINOuT
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com
SP207E_ꢀ00_072309
4
FEATuRES
Transmitter/Drivers
The SP207E, SP208E, SP211E and
SP213E multi–channelꢀtransceiversꢀfitꢀmostꢀ
RS-232/V.28ꢀcommunicationꢀneeds.ꢀꢀAllꢀofꢀ
theseꢀdevicesꢀfeatureꢀlow–powerꢀCMOSꢀcon-
struction and ExAR–proprietary on-board
charge pump circuitry to generate RS-232
signal-voltages,makingthemidealforappli-
cations where +9V and -9V supplies are not
available.ꢀTheꢀhighlyꢀefficientꢀchargeꢀpumpꢀ
is optimized to use small and inexpensive
0.ꢀµFchargepumpcapacitors,savingboard
space and reducing overall circuit cost.
Thedriversaresingle-endedinvertingtrans-
mitters,ꢀwhichꢀacceptꢀeitherꢀTTLꢀorꢀCMOSꢀ
inputs and output the RS-232 signals with
an inverted sense relative to the input logic
levels. Should the input of the driver be left
open, an internal pullup to VCC forces the
input high, thus committing the output to a
logic-ꢀ (MARK) state. The slew rate of the
transmitter output is internally limited to a
maximumꢀ ofꢀ30V/µsꢀinꢀorderꢀ toꢀmeetꢀtheꢀ
EIA/RS-232ꢀandꢀITUꢀV.28ꢀstandards.ꢀꢀTheꢀ
transition of the output from high to low also
meets the monotonicity requirements of the
standard even when loaded. Driver output
voltage swing is ±7V (typical) with no load,
and ±5V or greater at maximum load. The
transmitter outputs are protected against
infiniteꢀ short–circuitsꢀ toꢀ groundꢀ withoutꢀ
degradation in reliability.
Eachꢀ deviceꢀ providesꢀ aꢀ differentꢀ driver/
receiver combination to match standard
application requirements. The SP207E is
a 5-driver, 3-receiver device, ideal for DCE
applications such as modems, printers or
other peripherals. SP208Eꢀisꢀaꢀ4-driver/4-
receiver device, ideal for providing hand-
shaking signals in V.35 applications or other
general-purpose serial communications.
TheSP211EandSP213Eareeach3-driver,
5-receiver devices ideal for DTE serial ports
on a PC or other data-terminal equipment.
The drivers of the SP211E, and SP213E
canꢀbeꢀtri–statedꢀbyꢀusingꢀtheꢀSHUTDOWNꢀ
function. In this “power-off” state the charge
pump is turned off and VCC current drops to
ꢀµA typical. Driver output impedance will
remainꢀ greaterꢀ thanꢀ 300Ω,ꢀ satisfyingꢀ theꢀ
RS-232ꢀandꢀV.28ꢀspecifications.ꢀꢀForꢀSP211E
SHUTDOWNꢀisꢀactiveꢀwhenꢀpinꢀ25ꢀisꢀdrivenꢀ
high. For SP213EꢀSHUTDOWNꢀisꢀactiveꢀ
when pin 25 is driven low.
The SP211E and SP213E feature a low–
powershutdownmode,whichreducespower
supply drain to ꢀµA. The SP213E includes a
Wake-Upꢀfunctionꢀwhichꢀkeepsꢀtwoꢀreceiversꢀ
activeintheshutdownmode,unlessdisabled
by the EN pin.
Receivers
The receivers convert RS-232 level input
signalstoinvertedTTLlevelsignals.Because
signals are often received from a transmis-
sion line where long cables and system
interference can degrade signal quality, the
inputs have enhanced sensitivity to detect
weakened signals. The receivers also fea-
tureatypicalhysteresismarginof500mVfor
cleanreceptionofslowlytransitioningsignals
in noisy conditions. These enhancements
ensure that the receiver is virtually immune
to noisy transmission lines.
Theꢀfamilyꢀisꢀavailableꢀinꢀ28ꢀandꢀ24ꢀpinꢀSOꢀ
(wide)ꢀandꢀSSOPꢀ(shrink)ꢀsmallꢀoutlineꢀpack-
ages.ꢀDevicesꢀcanꢀbeꢀspecifiedꢀforꢀcommer-
cialꢀ(0˚Cꢀtoꢀ+70˚C)ꢀandꢀindustrial/extendedꢀ
(–40˚Cꢀtoꢀ+85˚C)ꢀoperatingꢀtemperatures.
THEORY OF OPERATION
Exar RS-232 transceivers contain three
basicꢀcircuitꢀblocksꢀ—ꢀa)ꢀtransmitter/driver,
b) receiver and c) the ExAR–proprietary
charge pump. SP211E and SP213E also
includeꢀ SHUTDOWNꢀ andꢀ ENABLEꢀ func-
tions.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com
SP207E_ꢀ00_072309
5
Receiver input thresholds are between ꢀ.2
to ꢀ.7 volts typical. This allows the receiver
toꢀdetectꢀstandardꢀTTLꢀorꢀCMOSꢀlogic-levelꢀ
signals as well as RS-232 signals. If a re-
ceiverinputisleftunconnectedorun-driven,
aꢀ5kΩꢀpulldownꢀresistorꢀtoꢀgroundꢀwillꢀcommitꢀ
the receiver to a logic-ꢀ output state.
Phase 2
— VSS transfer and invert — Phase two con-
nects the negative terminal of C2 to the VSS
storage capacitor and the positive terminal
of C2 to ground. This transfers the doubled
andinverted(V )voltageontoC3.Meanwhile,
capacitor Cꢀ charged from VCC to prepare it
for its next phase.
-
V
CC
= +5V
Highly Efficient Charge–Pump
The onboard dual-output charge pump is
usedtogeneratepositiveandnegativesignal
voltagesfortheRS-232drivers. Thisenables
fullycompliantRS-232andV.28signalsfrom
a single power supply device.
C
+
4
–
+
V
V
Storage Capacitor
Storage Capacitor
DD
+
–
+
–
C
1
C
2
–
SS
C
–10V
3
Figure 2. Charge Pump — Phase 2
Thechargepumpsusefourexternalcapaci-
tors to hold and transfer electrical charge.
The Eꢂar–patentedꢀ designꢀ (USꢀ Patentꢀ
#5,306,954) uses a unique approach com-
paredꢀtoꢀolder,ꢀless–efficientꢀdesigns.ꢀꢀTheꢀ
pumps use a four–phase voltage shifting
technique to attain symmetrical V+ and V-
power supplies. An intelligent control oscil-
lator regulates the operation of the charge
pump to maintain the proper voltages at
maximumꢀefficiency.
Phase 3
VDD charge store and double —Phase three
isꢀidenticalꢀtoꢀtheꢀfirstꢀphase.ꢀꢀTheꢀpositiveꢀ
terminalsofcapacitorsCꢀ andC2 arecharged
fromVCCwiththeirnegativeterminalsinitially
connectedtoground. Cl+isthenconnected
–
to ground and the stored charge from Cꢀ is
–
superimposed onto C2 . Since C2+ is still
connectedtoVCC thevoltagepotentialacross
capacitor C2 is now 2 x VCC.
V
= +5V
CC
Phase 1
VSS charge store and double — The positive
terminalsofcapacitorsCꢀ andC2 arecharged
fromVCCwiththeirnegativeterminalsinitially
connectedtoground. Cl+isthenconnected
to ground and the stored charge from Cꢀ– is
superimposed onto C2–. Since C2+ is still
connectedtoVCC thevoltagepotentialacross
capacitor C2 is now 2 x VCC.
C
+5V
4
+
–
+
V
V
Storage Capacitor
Storage Capacitor
DD
+
–
+
–
C
C
2
1
–
SS
C
–5V
–5V
3
Figure 3. Charge Pump — Phase 3
V
= +5V
CC
Phase 4
C
+5V
4
VDD transfer — The fourth phase connects
the negative terminal of C2 to ground and
the positive terminal of C2 to the VDD stor-
age capacitor. This transfers the doubled
(V+) voltage onto C4. Meanwhile, capacitor
Cꢀ is charged from VCC to prepare it for its
next phase.
+
–
+
V
V
Storage Capacitor
Storage Capacitor
DD
+
–
+
–
C
C
2
1
–
SS
C
–5V
–5V
3
Figure ꢀ. Charge Pump — Phase ꢀ
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com
SP207E_ꢀ00_072309
6
V
CC
= +5V
C
+
+10V
4
Voltage potential across any of the capaci-
tors will never exceed 2 x VCC. Therefore
capacitors with working voltages as low as
ꢀ0V rating may be used with a nominal VCC
supply. Cꢀ will never see a potential greater
than VCC , so a working voltage of 6.3V is
adequate. The reference terminal of the
VDD capacitor may be connected either to
VCC or ground, but if connected to ground a
–
+
V
V
Storage Capacitor
Storage Capacitor
DD
+
–
+
–
C
1
C
2
–
SS
C
3
Figure 4. Charge Pump — Phase 4
-
TheExarcharge-pumpgeneratesV+andV
independentlyfromVCC. Henceinano–load
condition V+ and V will be symmetrical.
Olderꢀchargeꢀpumpꢀapproachesꢀgenerateꢀ
V+ and then use part of that stored charge
to generate V . Because of inherent losses,
the magnitude of V will be smaller than V+
minimum ꢀ6V working voltage is required.
Higherꢀworkingꢀvoltagesꢀand/orꢀcapacitanceꢀ
values may be advised if operating at higher
VCC or to provide greater stability as the
capacitors age.
-
-
-
on these older designs.
Underꢀlightlyꢀloadedꢀconditionsꢀtheꢀintelligentꢀ
pumpꢀ oscillatorꢀ maximizesꢀ efficiencyꢀ byꢀ
running only as needed to maintain V+ and
-
V . Sinceinterfacetransceiversoftenspend
+10V
muchꢀofꢀtheirꢀtimeꢀatꢀidle,ꢀthisꢀpower-efficientꢀ
innovation can greatly reduce total power
consumption. This improvement is made
possiblebytheindependentphasesequence
of the Exar charge-pump design.
a) C2+
ꢀND
ꢀND
ꢃ) C2–
–10V
The clock rate for the charge pump typically
operates at greater than ꢀ5kHz, allowing
theꢀpumpꢀtoꢀrunꢀefficientlyꢀwithꢀsmallꢀ0.1µFꢀ
capacitors.ꢀꢀEfficientꢀoperationꢀdependsꢀonꢀ
rapidly charging and discharging Cꢀ and
C2, therefore capacitors should be mounted
closetotheICandhavelowESR(equivalent
series resistance). Low cost surface mount
ceramiccapacitors(suchasarewidelyused
for power-supply decoupling) are ideal for
use on the charge pump.
Figure 5. Typical waveforms seen on ca-
pacitor C2 when all drivers are at maximum
load.
However the charge pumps are designed
to be able to function properly with a wide
range of capacitor styles and values. If
polarized capacitors are used, the positive
andnegativeterminalsshouldbeconnected
as shown.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com
SP207E_ꢀ00_072309
7
SHuTDOꢁN MODE
SHuTDOꢁN CONDITIONS
SP211E and SP213E feature a control input
which will shut down the device and reduce
the power supply current to less than ꢀ0µA,
making the parts ideal for battery–powered
systems. Inshutdownmodethetransmitters
will be tri–stated, the V output of the charge
pumpwilldischargetoVCC,andtheV output
will discharge to ground. Shutdown will tri-
state all receiver outputs of the SP211E.
For complete shutdown to occur and the
ꢀ0µA power drain to be realized, the follow-
ingꢀconditionsꢀmustꢀbeꢀmet:
+
SP211E:
–
• +5V must be applied to the SD pin
• ENABLE must be either Ground, +5.0V or
not connected
• the transmitter inputs must be either +5.0V
or not connected
• VCC must be +5V
SP213E ꢁAKEuP FuNCTION
On the SP213E, shutdown will tri-state re-
ceiversꢀ-3. Receivers4and5remainactive
to provide a “wake-up” function and may be
used to monitor handshaking and control
inputsꢀforꢀactivity.ꢀꢀWithꢀonlyꢀtwoꢀreceiversꢀ
active during shutdown, the SP213E draws
only 5–ꢀ0µA of supply current.
• Receiver inputs must be >0V and <+5V
SP213E:
• 0V must be applied to the SD pin
• ENABLE must be either 0V, +5.0V or not
connected
• the transmitter inputs must be either +5.0V
or not connected
• VCC must be +5V
ManyꢀstandardꢀUARTꢀdevicesꢀmayꢀbeꢀcon-
figuredꢀtoꢀgenerateꢀanꢀinterruptꢀsignalꢀbasedꢀ
on changes to the Ring Indicate (RI) or other
inputs. A typical application of this function
would be to detect modem activity with the
computer in a power–down mode. The ring
indicator signal from the modem could be
passed through an active receiver in the
SP213E that is itself in the shutdown mode.
The ring indicator signal would propagate
through the SP213E to the power manage-
ment circuitry of the computer to power up
the microprocessor and the SP213E driv-
ers. After the supply voltage to the SP213E
reachesꢀ +5.0V,ꢀ theꢀ SHUTDOWNꢀ pinꢀ canꢀ
be disabled, taking the SP213E out of the
shutdown mode.
• Receiver inputs must be >0V and <+5V
Allreceiversthatareactiveduringshutdown
maintain 500mV (typ.) of hysteresis. All
receivers on the SP213E may be put into
tri-state using the ENABLE pin.
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 5ꢀ0-668-70ꢀ7 • www.exar.com
SP207E_ꢀ00_072309
8
RECEIVER ENAbLE
SP2ꢀꢀE
Drivers
Active
SP211E and SP213E feature an enable
input, which allows the receiver outputs to
be either tri–stated or enabled. This can be
especially useful when the receiver is tied
directly to a shared microprocessor data
bus. For the SP211E, enable is active low;
that is, ZeroV applied to the ENABLE pin
will enable the receiver outputs. For the
SP213E, enable is active high; that is, +5V
applied to the ENABLE pin will enable the
receiver outputs.
SD
0
EN#
ꢀ
Receivers
Tri-State
Active
0
0
Active
ꢀ
ꢀ
ꢀ
0
Off
Off
Tri-State
Tri-State
SP2ꢀ3E
SD#
EN
ꢀ
Drivers
RX ꢀ-3
RX 4-5
0
0
ꢀ
ꢀ
Off
Off
Tri-State
Tri-State
Active
Active
Tr-State
Active
0
ꢀ
Active
Active
0
Tri-State Tri-State
Tableꢀ2.ꢀShut-downꢀandꢀWake–UpꢀTruthꢀTables
POWER UP WITH SD ACTIVE (Charge pump in shutdown mode)
t
0 (POWERUP)
+5V
DATA VALID
R
OUT
0V
t
WAIT
ENABLE
SD
DISABLE
POWER UP WITH SD DISABLED (Charge pump in active mode)
t
0 (POWERUP)
+5V
DATA VALID
R
OUT
0V
t
ENABLE
ENABLE
SD
DISABLE
EXERCISING WAKE–UP FEATURE
t
0 (POWERUP)
+5V
DATA VALID
DATA VALID
DATA VALID
t
ENABLE
R
OUT
0V
t
t
ENABLE
ENABLE
SD
DISABLE
ENABLE
DISABLE
t
WAIT
V
= +5V –10%; T = 25 C
A
CC
t
t
= 2ms typical, 3ms maximum
= 1ms typical, 2ms maximum
WAIT
ENABLE
Figureꢀ6.ꢀWake–UpꢀTiming
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SP207E_ꢀ00_072309
9
theymustguaranteeacertainamountofESD
protection since the system itself is exposed
totheoutsideenvironmentandhumanpres-
ence. The premise with IECꢀ000-4-2 is that
thesystemisrequiredtowithstandanamount
of static electricity when ESD is applied to
points and surfaces of the equipment that
are accessible to personnel during normal
usage. The transceiver IC receives most
of the ESD current when the ESD source
is applied to the connector pins. The test
circuitforIECꢀ000-4-2isshownonFigure8.
There are two methods within IECꢀ000-4-2,
the Air Discharge method and the Contact
Discharge method.
ESD TOLERANCE
The SP207E Family incorporates rug-
gedized ESD cells on all driver output
and receiver input pins. The ESD struc-
ture is improved over our previous fam-
ily for more rugged applications and
environments sensitive to electro-static
discharges and associated transients. The
improved ESD tolerance is at least +ꢀ5kV
without damage nor latch-up.
There are different methods of ESD testing
applied:ꢀ
a) MIL-STD-883, Method 30ꢀ5.7
b) IECꢀ000-4-2 Air-Discharge
c) IECꢀ000-4-2 Direct Contact
Withꢀ theꢀ Airꢀ Dischargeꢀ Method,ꢀ anꢀ ESDꢀ
voltage is applied to the equipment under
testꢀ(EUT)ꢀthroughꢀair.ꢀꢀThisꢀsimulatesꢀanꢀ
electricallychargedpersonreadytoconnect
a cable onto the rear of the system only to
findꢀanꢀunpleasantꢀzapꢀjustꢀbeforeꢀtheꢀpersonꢀ
touches the back panel. The high energy
potential on the person discharges through
anarcingpathtotherearpanelofthesystem
before he or she even touches the system.
This energy, whether discharged directly or
throughair,ispredominantlyafunctionofthe
discharge current rather than the discharge
voltage. Variableswithanairdischargesuch
asꢀapproachꢀspeedꢀofꢀtheꢀobjectꢀcarryingꢀtheꢀ
ESD potential to the system and humidity
will tend to change the discharge current.
For example, the rise time of the discharge
current varies with the approach speed.
The Human Body Model has been the
generally accepted ESD testing method
for semiconductors. This method is also
specifiedꢀinꢀMIL-STD-883,ꢀMethodꢀ3015.7ꢀ
for ESD testing. The premise of this ESD
testistosimulatethehumanbody’spotential
to store electro-static energy and discharge
it to an integrated circuit. The simulation is
performed by using a test model as shown
in Figure 7. This method will test the IC’s
capability to withstand an ESD transient
during normal handling such as in manu-
facturing areas where the ICs tend to be
handled frequently.
The IEC-ꢀ000-4-2, formerly IEC80ꢀ-2, is
generallyusedfortestingESDonequipment
and systems. For system manufacturers,
R
S
R
C
SW1
SW2
Device
Under
Test
C
DC Power
Source
S
Figure 7. ESD Test Circuit for Human Body Model
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SP207E_ꢀ00_072309
ꢀ0
Contact-Discharge Model
R
R
R
V
C
S
SW1
SW2
Device
Under
Test
C
DC Power
Source
S
and
add up to 330Ω for IEC1000-4-2.
R
V
R
S
Figure 8. ESD Test Circuit for IECꢀ000-4-2
The Contact Discharge Method applies the
ESDꢀcurrentꢀdirectlyꢀtoꢀtheꢀEUT.ꢀꢀThisꢀmethodꢀ
was devised to reduce the unpredictability
of the ESD arc. The discharge current rise
time is constant since the energy is directly
transferred without the air-gap arc.
In situations such as hand held systems, the
ESD charge can be directly discharged to
theequipmentfromapersonalreadyholding
the equipment. The current is transferred
on to the keypad or the serial port of the
equipment directly and then travels through
theꢀPCBꢀandꢀfinallyꢀtoꢀtheꢀIC.
30A
ꢀ5A
0A
ThecircuitmodelinFigures7and8represent
the typical ESD testing circuit used for all
three methods. The C is initially charged
withꢀ theꢀ DCꢀ powerꢀ suSpplyꢀ whenꢀ theꢀ firstꢀ
switchꢀ(SW1)ꢀisꢀon.
Now that the capacitor is charged, the sec-
ondꢀswitchꢀ(SW2)ꢀisꢀonꢀwhileꢀSW1ꢀswitchesꢀ
off. The voltage stored in the capacitor is
then applied through RS, the current limiting
resistor,ꢀontoꢀtheꢀdeviceꢀunderꢀtestꢀ(DUT).ꢀ
InꢀESDꢀtests,ꢀtheꢀSW2ꢀswitchꢀisꢀpulsedꢀsoꢀ
that the device under test receives a dura-
tion of voltage.
t=0ns
t=30ns
t
Figureꢀ9.ꢀESDꢀTestꢀWaveformꢀforꢀIEC1000-4-2
(CS)ꢀareꢀ1.5kΩꢀanꢀ100pF,ꢀrespectively.ꢀꢀForꢀ
IEC-ꢀ000-4-2, the current limiting resistor
(R ) and the source capacitor (CS)ꢀareꢀ330Ωꢀ
anSꢀ50pF, respectively.
The higher CS value and lower R value in
the IECꢀ000-4-2 model are moreSstringent
than the Human Body Model. The larger
storageꢀcapacitorꢀinjectsꢀaꢀhigherꢀvoltageꢀ
toꢀtheꢀtestꢀpointꢀwhenꢀSW2ꢀisꢀswitchedꢀon.ꢀ
The lower current limiting resistor increases
the current charge onto the test point.
For the Human Body Model, the current
limitingresistor(RS)andthesourcecapacitor
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SP207E_ꢀ00_072309
ꢀꢀ
Theꢀ largerꢀ storageꢀ capacitorꢀ injectsꢀ aꢀ
higherꢀvoltageꢀtoꢀtheꢀtestꢀpointꢀwhenꢀSW2ꢀ
is switched on. The lower current limiting
resistor increases the current charge onto
the test point.
TheRS-232isarelativelyslowdataexchange
protocol, with a maximum baud rate of only
20kbps, which can be transmitted over a
maximumcopperwirecablelengthof50feet.
TheSP207EthroughSP2ꢀ3ESeriesofdata
communications interface products have
beendesignedtomeetboththeEIAprotocol
standards, and the needs of the industry.
EIA STANDARDS
The Electronic Industry Association (EIA)
developed several standards of data
transmission which are revised and up-
dated in order to meet the requirements
of the industry. In data processing, there
are two basic means of communicating
between systems and components. The
RS--232ꢀ standardꢀ wasꢀ firstꢀ introducedꢀ inꢀ
ꢀ962 and, since that time, has become an
industry standard.
DEVICE PIN
TESTED
HuMAN bODY
MODEL
IEC1000-4-2
Air Discharge Direct Contact
Level
DriverꢀOutputsꢀ ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ+ꢀ5kV
Receiver Inputs +ꢀ5kV
+ꢀ5kV
+ꢀ5kV
+8kV
+8kV
4
4
Table 3. Transceiver ESD Tolerance Levels
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SP207E_ꢀ00_072309
ꢀ2
TYPICAL APPLICATION CIRCuITS...SP207E TO SP213E
+5V
11
VCC
12
Typical EIA-232
Application:
C1+
C1 -
C2+
C2 -
V+
V-
14
15
13
17
SP213E, UART &
DB-9 Connector
16
8
9
DCD
DSR
1
2
3
4
5
16C550
UART
22
23
6
7
8
9
Rx
26
7
27
2
DCD
DSR
SI
RTS
Tx
6
3
CTS
DTR
RTS
SO
5
4
1
CTS
DTR
RI
RI
20
19
18
CS
NC
NC
SG
28
21
25
24
CS
VCC or CS *
SHUTDOWN
EN
GND
Figure ꢀ0. Typical SP2ꢀ3E Application
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SP207E_ꢀ00_072309
ꢀ3
TYPICAL APPLICATION CIRCuITS...SP207E TO SP213E
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SP207E_ꢀ00_072309
ꢀ4
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SP207E_ꢀ00_072309
ꢀ5
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SP207E_ꢀ00_072309
ꢀ6
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SP207E_ꢀ00_072309
ꢀ7
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SP207E_ꢀ00_072309
ꢀ8
ORDERINꢀ INFORMATION
RS232ꢀTransceivers:
Model ......................Drivers.............................Receivers ........................................Temperature Range .................................... Package Type
SP207ECA-L ...............5 ........................................3 .................................................... 0°C to +70°C.................................................24–pinꢀSSOP
SP207ECT-L ..............5 ........................................3 .................................................... 0°C to +70°C.................................................. 24–pinꢀSOIC
SP207EEA -L ...............5 ........................................3 ................................................ –40°C to +85°C.................................................24–pinꢀSSOP
SP207EET-L ................5 ........................................3 ................................................ –40°C to +85°C.................................................. 24–pinꢀSOIC
SP208ECA-L ...............4 ........................................4 .................................................... 0°C to +70°C.................................................24–pinꢀSSOP
SP208ECT-L ...............4 ........................................4 .................................................... 0°C to +70°C.................................................. 24–pinꢀSOIC
SP208EEA-L ...............4 ........................................4 ................................................ –40°C to +85°C.................................................24–pinꢀSSOP
SP208EET-L ................4 ........................................4 ................................................ –40°C to +85°C.................................................. 24–pinꢀSOIC
RS232ꢀTransceiversꢀwithꢀLow–PowerꢀShutdownꢀandꢀTri–stateꢀEnable:
Model ......................Drivers.............................Receivers ........................................Temperature Range .................................... Package Type
SP2ꢀꢀECA-L.................4.................................. ......5.....................................................0°C to +70°C ................................................28–pinꢀSSOP
SP2ꢀꢀECT-L .................4.................................. ......5.....................................................0°C to +70°C ................................................. 28–pinꢀSOIC
SP2ꢀꢀEEA-L .................4 ................................. ......5.................................................–40°C to +85°C ................................................28–pinꢀSSOP
SP2ꢀꢀEET-L .................4.................................. ......5.................................................–40°C to +85°C ................................................. 28–pinꢀSOIC
RS232ꢀTransceiversꢀwithꢀLow–PowerꢀShutdown,ꢀTri–stateꢀEnable,ꢀandWake–UpꢀFunction:
Model ......................Drivers.............................Receivers ........................................Temperature Range .................................... Package Type
SP2ꢀ3ECA-L.......... 4........................................ 5, with 2 active in Shutdown.................0°C to +70°C................................................28–pinꢀSSOP
SP2ꢀ3ECT-L .......... 4........................................ 5, with 2 active in Shutdown.................0°C to +70°C................................................. 28–pinꢀSOIC
SP2ꢀ3EEA-L.......... 4........................................ 5, with 2 active in Shutdown.............–40°C to +85°C................................................28–pinꢀSSOP
SP2ꢀ3EET-L........... 4........................................ 5, with 2 active in Shutdown.............–40°C to +85°C................................................. 28–pinꢀSOIC
PleaseꢀconsultꢀtheꢀfactoryꢀforꢀpricingꢀandꢀavailabilityꢀonꢀaꢀTape-On-Reelꢀoption.
DATE
1/27/06
07/23/09
REVISION DESCRIPTION
--
Legacy Sipex Datasheet
ꢀ.0.0
Convert to Exar format, update ordering information and
change rev to ꢀ.0.0
Notice
EXAR Corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reli-
ability. EXAR Corporation assumes no representation that the circuits are free of patent infringement. Charts and schedules contained herein are
onlyꢀforꢀillustrationꢀpurposesꢀandꢀmayꢀvaryꢀdependingꢀuponꢀaꢀuser'sꢀspecificꢀapplication.ꢀWhileꢀtheꢀinformationꢀinꢀthisꢀpublicationꢀhasꢀbeenꢀcarefullyꢀ
checked;
no responsibility, however, is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can
reasonablyꢀbeꢀexpectedꢀtoꢀcauseꢀfailureꢀofꢀtheꢀlifeꢀsupportꢀsystemꢀorꢀtoꢀsignificantlyꢀaffectꢀitsꢀsafetyꢀorꢀeffectiveness.ꢀProductsꢀareꢀnotꢀauthorizedꢀforꢀ
useꢀinꢀsuchꢀapplicationsꢀunlessꢀEXARꢀCorporationꢀreceives,ꢀinꢀwritting,ꢀassurancesꢀtoꢀitsꢀsatisfactionꢀthat:ꢀ(a)ꢀtheꢀriskꢀofꢀinjuryꢀorꢀdamageꢀhasꢀbeenꢀ
minimized ; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.
Copyright 2009 EXAR Corporation
Datasheet July 2009
SendꢀyourꢀInterfaceꢀtechnicalꢀinquiryꢀwithꢀtechnicalꢀdetailsꢀto:ꢀꢀuarttechsupport@exar.com
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
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SP207E_ꢀ00_072309
ꢀ9
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