SN75C3238EPWR [TI]
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS WITH 【15-kV ESD (HBM) PROTECTION; 3V至5.5V多通道RS - 232线路驱动器/带【 15千伏ESD （ HBM ）保护接收机
| 型号： | SN75C3238EPWR |
| 厂家： | 
TEXAS INSTRUMENTS |
| 描述： | 3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS WITH 【15-kV ESD (HBM) PROTECTION |
| 文件： | 总15页 (文件大小：253K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
FEATURES
DB, DW, OR PW PACKAGE
•
RS-232 Bus-Pin ESD Protection Exceeds
(TOP VIEW)
±15 kV Using Human-Body Model (HBM)
C2+
GND
C2−
C1+
27 V+
26
1
28
•
Meet or Exceed the Requirements of
TIA/EIA-232-F and ITU v.28 Standards
2
3
V
CC
•
•
•
•
Operate With 3-V to 5.5-V VCC Supply
Operate up to 1000 kbit/s
V−
4
25 C1−
DOUT1
DOUT2
DOUT3
RIN1
5
24 DIN1
Five Drivers and Three Receivers
6
23
22
21
20
19
18
17
16
15
DIN2
Auto-Powerdown Plus Feature Enables
Flexible Power-Down Mode
7
DIN3
8
ROUT1
ROUT2
DIN4
9
RIN2
DOUT4
RIN3
•
•
•
•
Low Standby Current . . . 1 µA Typical
External Capacitors . . . 4 × 0.1 µF
10
11
12
13
14
ROUT3
DIN5
Accept 5-V Logic Input With 3.3-V Supply
DOUT5
FORCEON
FORCEOFF
Always-Active Noninverting Receiver Output
(ROUT1B)
ROUT1B
INVALID
•
ESD Protection for RS-232 Interface Pins
– ±15 kV – Human-Body Model (HBM)
– ±8 kV – IEC61000-4-2, Contact Discharge
– ±15 kV – IEC61000-4-2, Air-Gap Discharge
RHB PACKAGE
(TOP VIEW)
APPLICATIONS
•
•
•
•
•
•
•
•
•
Battery-Powered Systems
PDAs
Notebooks
Subnotebooks
Laptops
Palmtop PCs
Hand-Held Equipment
Modems
32 31 30 29 28 27 26 25
1
2
3
4
5
6
7
8
24
DOUT1
DOUT2
DOUT3
RIN1
RIN2
DOUT4
RIN3
C1–
DIN1
DIN2
DIN3
ROUT1
ROUT2
DIN4
23
22
21
20
19
18
17
Printers
NC
ROUT3
9 10 11 12 13 14 15 16
DESCRIPTION/ORDERING INFORMATION
The SN65C3238E and SN75C3238E consist of five line drivers, three line receivers, and a dual charge-pump
circuit with ±15-kV ESD (HBM) protection on the driver output (DOUT) and receiver input (RIN) terminals. The
devices meet the requirements of TIA/EIA-232-F and provide the electrical interface between notebook and
subnotebook computer applications. The charge pump and four small external capacitors allow operation from a
single 3-V to 5.5-V supply. In addition, the devices include an always-active noninverting output (ROUT1B),
which allows applications using the ring indicator to transmit data while the device is powered down. These
devices operate at data signaling rates up to 1000 kbit/s.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCT PREVIEW information concerns products in the
Copyright © 2006, Texas Instruments Incorporated
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
DESCRIPTION/ORDERING INFORMATION (CONTINUED)
Flexible control options for power management are featured when the serial port and driver inputs are inactive.
The auto-powerdown plus feature functions when FORCEON is low and FORCEOFF is high. During this mode
of operation, if the devices do not sense valid signal transitions on all receiver and driver inputs for
approximately 30 s, the built-in charge pump and drivers are powered down, reducing the supply current to
1 µA. By disconnecting the serial port or placing the peripheral drivers off, auto-powerdown plus occurs if there
is no activity in the logic levels for the driver inputs. Auto-powerdown plus can be disabled when FORCEON and
FORCEOFF are high. With auto-powerdown plus enabled, the devices activate automatically when a valid signal
is applied to any receiver or driver input. INVALID is high (valid data) if any receiver input voltage is greater than
2.7 V or less than –2.7 V, or has been between –0.3 V and 0.3 V for less than 30 µs. INVALID is low (invalid
data) if all receiver input voltages are between –0.3 V and 0.3 V for more than 30 µs. Refer to Figure 5 for
receiver input levels.
ORDERING INFORMATION
TA
PACKAGE(1)
ORDERABLE PART NUMBER
SN75C3238EDB
TOP-SIDE MARKING
75C3238E
Tube of 50
SSOP – DB
Reel of 2000
Tube of 50
SN75C3238EDBR
SN75C3238EPW
TSSOP – PW
Preview
0°C to 70°C
Reel of 2000
Tube of 50
SN75C3238EPWR
SN75C3238EDW
SOIC – DW
QFN – RHB
SSOP – DB
75C3238E
Preview
Reel of 2000
Reel of 2000
Tube of 50
SN75C3238EDWR
SN75C3238ECRHBR
SN65C3238EDB
65C3238E
Reel of 2000
Tube of 50
SN65C3238EDBR
SN65C3238EPW
TSSOP – PW
Preview
–40°C to 85°C
Reel of 2000
Tube of 50
SN65C3238EPWR
SN65C3238EDW
SOIC – DW
QFN – RHB
65C3238E
Preview
Reel of 2000
Reel of 2000
SN65C3238EDWR
SN65C3238EIRHBR
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
2
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SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
FUNCTION TABLES
abc
Each Driver(1)
INPUTS
OUTPUT
DOUT
DRIVER STATUS
TIME ELAPSED SINCE LAST
RIN OR DIN TRANSITION
DIN
FORCEON
FORCEOFF
X
L
X
H
H
L
L
X
Z
H
L
Powered off
H
H
H
H
H
H
X
Normal operation with
auto-powerdown plus disabled
H
L
X
<30 s
<30 s
>30 s
>30 s
H
L
Normal operation with
auto-powerdown plus enabled
H
L
L
L
Z
Z
Powered off by
auto-powerdown plus feature
H
L
(1) H = high level, L = low level, X = irrelevant, Z = high impedance
Each Receiver(1)
INPUTS
FORCEOFF
OUTPUTS
RECEIVER STATUS
TIME ELAPSED SINCE LAST
RIN OR DIN TRANSITION
ROUT2 AND
RIN1
RIN2–RIN3
ROUT1B
ROUT3
L
H
X
X
L
L
X
L
H
L
Z
Z
H
L
Powered off while
ROUT1B is active
X
L
L
H
H
H
H
H
<30 s
<30 s
<30 s
<30 s
<30 s
L
H
L
Normal operation with
auto-powerdown plus
disabled/enabled
H
L
H
H
L
H
L
H
H
Open
Open
H
(1) H = high level, L = low level, X = irrelevant, Z = high impedance (off), Open = input disconnected or connected driver off
3
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SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
LOGIC DIAGRAM (POSITIVE LOGIC)
24
5
6
DIN1
DIN2
DOUT1
23
DOUT2
DOUT3
DOUT4
DOUT5
22
19
17
7
10
12
DIN3
DIN4
DIN5
14
13
FORCEOFF
FORCEON
15
Auto-powerdown Plus
INVALID
16
21
ROUT1B
ROUT1
8
RIN1
20
18
9
ROUT2
ROUT3
RIN2
RIN3
11
4
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SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
Absolute Maximum Ratings(1)
over operating free-air temperature range (unless otherwise noted)
MIN
–0.3
–0.3
0.3
MAX
UNIT
VCC
V+
Supply voltage range(2)
Positive-output supply voltage range(2)
Negative-output supply voltage range(2)
6
V
V
V
V
7
–7
V–
V+ – V– Supply voltage difference(2)
13
Driver (FORCEOFF, FORCEON)
Receiver
–0.3
–25
6
VI
Input voltage range
Output voltage range
V
V
25
Driver
–13.2
–0.3
13.2
VCC + 0.3
62
VO
Receiver (INVALID)
DB package
DW package
46
θJA
Package thermal impedance(3)(4)
°C/W
PW package
62
RHB package
TBD
150
150
TJ
Operating virtual junction temperature
Storage temperature range
°C
°C
Tstg
–65
(1) Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating
conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) All voltages are with respect to network GND.
(3) Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowable ambient
temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can affect reliability.
(4) The package thermal impedance is calculated in accordance with JESD 51-7.
Recommended Operating Conditions(1)
See Figure 6
MIN NOM
MAX UNIT
VCC = 3.3 V
VCC = 5 V
VCC = 3.3 V
VCC = 5 V
3
4.5
2
3.3
5
3.6
V
Supply voltage
5.5
5.5
V
DIN, FORCEOFF,
FORCEON
VIH
Driver and control high-level input voltage
2.4
0
5.5
VIL
VI
Driver and control low-level input voltage
Receiver input voltage
DIN, FORCEOFF, FORCEON
0.8
25
70
85
V
V
–25
0
SN75C3238E
SN65C3238E
TA
Operating free-air temperature
°C
–40
(1) Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
Electrical Characteristics(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
TEST CONDITIONS
MIN TYP(2)
MAX UNIT
II
Input leakage current FORCEOFF, FORCEON
±0.01
±1
µA
Auto-powerdown plus
disabled
No load,
0.5
1
2
mA
FORCEOFF and FORCEON at VCC
Supply current
(TA = 25°C)
Powered off
No load, FORCEOFF at GND
10
ICC
No load, FORCEOFF at VCC
FORCEON at GND,
All RIN are open or grounded
,
µA
Auto-powerdown plus
enabled
1
10
(1) Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
(2) All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
5
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SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
DRIVER SECTION
xxx
Electrical Characteristics(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
TEST CONDITIONS
All DOUT at RL = 3 kΩ to GND
MIN TYP(2) MAX UNIT
VOH High-level output voltage
VOL Low-level output voltage
5
5.4
–5.4
V
V
All DOUT at RL = 3 kΩ to GND
VI = VCC
–5
IIH
IIL
High-level input current
Low-level input current
±0.01
±0.01
±1
±1
µA
µA
VI at GND
VCC = 3.6 V,
VO = 0 V
±35 ±60
±40 ±100
10M
IOS
ro
Short-circuit output current(3)
Output resistance
mA
Ω
VCC = 5.5 V,
VO = 0 V
VCC, V+, and V– = 0 V,
VO = ±2 V
VO = ±12 V,
VO = ±10 V,
300
VCC = 3 V to 3.6 V
±25
IOZ
Output leakage current
FORCEOFF = GND
µA
VCC = 4.5 V to 5.5 V
±25
(1) Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
(2) All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
(3) Short-circuit durations should be controlled to prevent exceeding the device absolute power dissipation ratings, and not more than one
output should be shorted at a time.
Switching Characteristics(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
TEST CONDITIONS
CL = 1000 pF
MIN TYP(2) MAX UNIT
250
Maximum data rate RL = 3 kΩ,
CL = 250 pF,
VCC = 3 V to 4.5 V
VCC = 4.5 V to 5.5 V
See Figure 2
1000
1000
kbit/s
(see Figure 1)
One DOUT switching
CL = 1000 pF,
tsk(p)
Pulse skew(3)
CL = 150 pF to 2500 pF,
CL = 150 pF to 1000 pF,
RL = 3 kΩ to 7 kΩ,
25
ns
Slew rate,
transition region
(see Figure 1)
SR(tr)
RL = 3 kΩ to 7 kΩ,
VCC = 3.3 V
18
150 V/µs
(1) Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
(2) All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
(3) Pulse skew is defined as |tPLH – tPHL| of each channel of the same device.
ESD Protection
PARAMETER
TEST CONDITIONS
TYP
±15
±15
±8
UNIT
HBM
DOUT
IEC 61000-4-2, Air-Gap Discharge
IEC 61000-4-2, Contact Discharge
kV
6
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SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
RECEIVER SECTION
xxx
Electrical Characteristics(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 6)
PARAMETER
High-level output voltage
TEST CONDITIONS
IOH = –1 mA
MIN
TYP(2)
MAX UNIT
VOH
VOL
VCC – 0.6
VCC – 0.1
V
Low-level output voltage
IOL = 1.6 mA
VCC = 3.3 V
VCC = 5 V
0.4
2.4
2.4
V
1.5
1.8
VIT+
Positive-going input threshold voltage
V
VCC = 3.3 V
VCC = 5 V
0.6
0.8
1.2
VIT–
Negative-going input threshold voltage
V
1.5
Vhys
IOZ
ri
Input hysteresis (VIT+ – VIT–
)
0.3
V
Output leakage current (except ROUT1B)
Input resistance
FORCEOFF = 0 V
±0.05
5
±10
µA
kΩ
VI = ±3 V to ±25 V
3
7
(1) Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
(2) All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
Switching Characteristics(1)
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)
PARAMETER
TEST CONDITIONS
CL = 150 pF, See Figure 3
TYP(2) UNIT
tPLH Propagation delay time, low- to high-level output
tPHL Propagation delay time, high- to low-level output
150
150
200
200
50
ns
ns
ns
ns
ns
CL = 150 pF, See Figure 3
CL = 150 pF, RL = 3 kΩ, See Figure 4
CL = 150 pF, RL = 3 kΩ, See Figure 4
See Figure 3
ten
Output enable time
Output disable time
tdis
tsk(p) Pulse skew(3)
(1) Testing supply conditions are C1–C4 = 0.1 µF at VCC = 3.3 V ± 0.15 V; C1–C4 = 0.22 µF at VCC = 3.3 V ± 0.3 V; and C1 = 0.047 µF
and C2–C4 = 0.33 µF at VCC = 5 V ± 0.5 V.
(2) All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
(3) Pulse skew is defined as |tPLH – tPHL| of each channel of the same device.
ESD Protection
PARAMETER
TEST CONDITIONS
TYP
±15
±15
±8
UNIT
HBM
RIN
IEC 61000-4-2, Air-Gap Discharge
IEC 61000-4-2, Contact Discharge
kV
7
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SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
AUTO-POWERDOWN PLUS SECTION
xxx
Electrical Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5)
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
Receiver input threshold
for INVALID high-level output voltage
VT+(valid)
VT–(valid)
VT(invalid)
VOH
FORCEON = GND, FORCEOFF = VCC
2.7
V
Receiver input threshold
for INVALID high-level output voltage
FORCEON = GND, FORCEOFF = VCC
FORCEON = GND, FORCEOFF = VCC
–2.7
–0.3
V
V
V
V
Receiver input threshold
for INVALID low-level output voltage
0.3
0.4
IOH = –1 mA, FORCEON = GND,
FORCEOFF = VCC
INVALID high-level output voltage
INVALID low-level output voltage
VCC – 0.6
IOL = 1.6 mA, FORCEON = GND,
FORCEOFF = VCC
VOL
Switching Characteristics
over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figure 5)
PARAMETER
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
Supply enable time
MIN
TYP(1)
0.1
MAX UNIT
tvalid
tinvalid
ten
µs
µs
µs
50
25
tdis
Receiver or driver edge to auto-powerdown plus
15
30
60
s
(1) All typical values are at VCC = 3.3 V or VCC = 5 V, and TA = 25°C.
8
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SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
PARAMETER MEASUREMENT INFORMATION
3 V
Input
RS-232
0 V
Output
Generator
(see Note B)
50 Ω
t
t
TLH
THL
C
L
R
L
(see Note A)
V
V
OH
3 V
−3 V
3 V
−3 V
3 V
FORCEOFF
Output
OL
6 V
tTHL or tTLH
SR(tr) +
TEST CIRCUIT
VOLTAGE WAVEFORMS
A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns,
tf ≤ 10 ns.
Figure 1. Driver Slew Rate
3 V
0 V
Input
1.5 V
1.5 V
RS-232
Output
Generator
(see Note B)
50 Ω
C
L
t
t
PLH
PHL
R
L
(see Note A)
V
V
OH
3 V
FORCEOFF
50%
50%
Output
OL
TEST CIRCUIT
A. CL includes probe and jig capacitance.
VOLTAGE WAVEFORMS
B. The pulse generator has the following characteristics: PRR = 250 kbit/s, ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns,
tf ≤ 10 ns.
Figure 2. Driver Pulse Skew
3 V or 0 V
FORCEON
3 V
−3 V
Input
1.5 V
1.5 V
Output
Generator
(see Note B)
t
t
PLH
PHL
50 Ω
C
L
(see Note A)
3 V
FORCEOFF
V
V
OH
50%
50%
Output
OL
TEST CIRCUIT
VOLTAGE WAVEFORMS
A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
Figure 3. Receiver Propagation Delay Times
9
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SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
PARAMETER MEASUREMENT INFORMATION (continued)
3 V
Input
1.5 V
1.5 V
V
CC
GND
3 V or 0 V
FORCEON
0 V
S1
t
PHZ
R
L
(S1 at GND)
V
OH
3 V or 0 V
Output
50%
Output
0.3 V
C
L
(see Note A)
FORCEOFF
50 Ω
t
t
PZL
PLZ
(S1 at V )
CC
(S1 at V )
CC
Generator
(see Note B)
0.3 V
Output
50%
V
OL
TEST CIRCUIT
A. CL includes probe and jig capacitance.
B. The pulse generator has the following characteristics: ZO = 50 Ω, 50% duty cycle, tr ≤ 10 ns, tf ≤ 10 ns.
C. tPLZ and tPHZ are the same as tdis
D. tPZL and tPZH are the same as ten
VOLTAGE WAVEFORMS
.
.
Figure 4. Receiver Enable and Disable Times
10
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SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
PARAMETER MEASUREMENT INFORMATION (continued)
Valid RS-232 Level, INVALID High
ROUT
2.7 V
Generator
(see Note B)
50 Ω
Indeterminate
0.3 V
If Signal Remains Within This Region
For More Than 30 µs, INVALID Is Low
0 V
†
−0.3 V
Indeterminate
Auto-
powerdown
Plus
INVALID
−2.7 V
C = 30 pF
(see Note A)
L
Valid RS-232 Level, INVALID High
†
Auto-powerdown plus disables drivers and reduces
supply current to 1 µA.
FORCEOFF
FORCEON
DIN
DOUT
TEST CIRCUIT
NOTES: A. C includes probe and jig capacitance.
L
B. The pulse generator has the following
characteristics: PRR = 5 kbit/s, Z = 50 Ω, 50%
O
duty cycle, t ≤ 10 ns, t ≤ 10 ns.
r
f
3 V
2.7 V
Receiver
Input
0 V
0 V
−2.7 V
−3 V
t
invalid
t
valid
INVALID
Output
V
CC
50%
50%
0 V
3 V to 5 V
Driver
Input
50%
50%
0 V
≈5.5 V
Driver
Output
≈ −5.5 V
t
dis
t
dis
t
en
t
en
V+
V+
V+ −0.3 V
Supply
Voltages
V− +0.3 V
V−
V−
Voltage Waveforms and Timing Diagrams
Figure 5. INVALID Propagation-Delay Times and Supply-Enabling Time
11
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SN65C3238E, SN75C3238E
3-V TO 5.5-V MULTICHANNEL RS-232 LINE DRIVERS/RECEIVERS
WITH ±15-kV ESD (HBM) PROTECTION
www.ti.com
SLLS726–MAY 2006
APPLICATION INFORMATION
+
C
= 0.1 µF
BYPASS
−
28
27
C1+
V+
1
2
C2+
+
−
+
GND
†
C3
C2
+
−
−
C1
3
4
26
25
24
C2−
V−
V
CC
−
+
C1−
C4
5
6
7
8
9
DIN1
DIN2
DIN3
DOUT1
DOUT2
DOUT3
RIN1
23
22
21
20
ROUT1
ROUT2
RS-232 Port
RIN2
Logic I/Os
5 kΩ
10
11
19
18
DOUT4
RIN3
DIN4
ROUT3
5 kΩ
12
17
16
DOUT5
DIN5
ROUT1B
5 kΩ
Auto-
powerdown
Plus
13
14
15
FORCEON
FORCEOFF
INVALID
V
CC
vs CAPACITOR VALUES
V
CC
C1
C2, C3, and C4
†
C3 can be connected to V or GND.
CC
3.3 V ± 0.15 V
3.3 V ± 0.3 V
5 V ± 0.5 V
0.1 µF
0.22 µF
0.047 µF
0.22 µF
0.1 µF
0.22 µF
0.33 µF
1 µF
NOTES: A. Resistor values shown are nominal.
B. Nonpolarizedceramic capacitors are acceptable. If polarized tantalum
or electrolytic capacitors are used, they should be connected as
shown.
3 V to 5.5 V
Figure 6. Typical Operating Circuit and Capacitor Values
12
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MECHANICAL DATA
MSSO002E – JANUARY 1995 – REVISED DECEMBER 2001
DB (R-PDSO-G**)
PLASTIC SMALL-OUTLINE
28 PINS SHOWN
0,38
0,22
0,65
28
M
0,15
15
0,25
0,09
5,60
5,00
8,20
7,40
Gage Plane
1
14
0,25
A
0°–ā8°
0,95
0,55
Seating Plane
0,10
2,00 MAX
0,05 MIN
PINS **
14
16
20
24
28
30
38
DIM
6,50
5,90
6,50
5,90
7,50
8,50
7,90
10,50
9,90
10,50 12,90
A MAX
A MIN
6,90
9,90
12,30
4040065 /E 12/01
NOTES: A. All linear dimensions are in millimeters.
B. This drawing is subject to change without notice.
C. Body dimensions do not include mold flash or protrusion not to exceed 0,15.
D. Falls within JEDEC MO-150
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