UT213L-R28-R [UTC]
Line Driver/Receiver,;
| 型号： | UT213L-R28-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | Line Driver/Receiver, |
| 文件： | 总8页 (文件大小：313K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
UT213
CMOS IC
+5.0V POWER SUPPLY, 120KBPS,
MULTICHANNAEL RS-232 LINE
DRIVERS/RECEIVERS
SOP-28
DESCRIPTION
The UTC UT213 consists of 4 drivers and 5 receivers. It meets
ElA/TIA-232 and V.28/V.24 specifications, it intended for notebook
computer applications. A high-efficiency, dual charge-pumps power supply
and a low-dropout transmitter combine to deliver true RS-232 performance
from a single +4.5V~+5.5V power supply. A guaranteed data rate of
120kbps provides compatibility with popular software for communicating
with PCs.
SSOP-28
The UTC UT213 has an active-low shutdown and an active-high
receiver enable control.
FEATURES
* Operates With 4.5V~5.5V Power Supply
* Four Drivers and Five Receivers
* Designed to Transmit at a Data Rate of 120 kbps
* Low Standby Current (15µA Typical)
* Serial-Mouse Drivability
* Exceeds ±8KV ESD Protection(HBM) for RS-232 I/O Pins
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
UT213L-S28-R
UT213L-R28-R
UT213G-S28-R
UT213G-R28-R
SOP-28
Tape Reel
Tape Reel
SSOP-28
UT213G-S28-R
(1) R: Tape Reel
(2) S28: SOP-28, R28: SSOP-28
(3) G: Halogen Free and Lead Free, L: Lead Free
(1)Packing Type
(2)Package Type
(3)Green Package
■
MARKING
23
15
16
17
24
25
22 21 20 19 18
28 27
26
Date Code
UTC
U T 2 1
L: Lead Free
G: Halogen Free
3
Lot Code
1
2
4
6
7
8
9
10
12 13 14
11
3
5
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UT213
CMOS IC
PIN CONFIGURATION
T3OUT
T1OUT
T2OUT
1
2
28
27
26
T4OUT
R3IN
3
R3OUT
4
R2IN
R2OUT
T2IN
25 SHDN
24 EN
5
6
23
22
21
20
R4IN
T1IN
7
R4OUT
T4IN
UTC
UT213
R1OUT
R1IN
8
9
T3IN
10
11
12
13
14
GND
VCC
C1+
V+
19 R5OUT
R5IN
V-
18
17
16
15
C2-
C2+
C1-
PIN DESCRIPTION
PIN NO.
1, 2, 3, 28
4, 9, 27
5, 8, 26
6, 7, 20, 21
10
PIN NAME
TXOUT
DESCRIPTION
RS-232 Transmitter Outputs
RS-232 Receiver Inputs
TTL/CMOS Receiver Outputs
TTL/CMOS Transmitter Inputs
Ground
R1IN ~ R3IN
R1OUT ~ R3OUT
TXIN
GND
11
VCC
+4.5V ~ +5.5V Supply Voltage
12
C1+
Positive terminal of the voltage doubler charge-pump capacitor
+5.5V generated by the charge pump
13
V+
14
C1-
Negative terminal of the voltage doubler charge-pump capacitor
Positive terminal of inverting charge-pump capacitor
Negative terminal of inverting charge-pump capacitor
-5.5V generated by the charge pump
15
C2+
16
C2-
17
V-
18, 23
19, 22
24
R4IN ~ R5IN
R4OUT ~ R5OUT
EN
RS-232 Receiver Inputs (Active in shutdown)
TTL/CMOS Receiver Outputs (Active in shutdown)
Active high enable control
25
Active low shutdown control
SHDN
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UT213
CMOS IC
BLOCK DIAGRAM
VCC
400kΩ
VCC
400kΩ
VCC
400kΩ
VCC
400kΩ
T1IN
T2IN
T3IN
T4IN
T1OUT
T2OUT
T3OUT
T4OUT
T1
T2
T3
T4
SHDN
EN
SHUTDOWN
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
R1IN
R2IN
R2IN
R4IN
R5IN
R1
R2
R3
R4
R5
5kΩ
5kΩ
5kΩ
5kΩ
5kΩ
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UT213
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
VCC
RATINGS
+6.0
UNIT
VCC
V
V
V
V
V+ (Note 2)
V- (Note 2)
V+ +|V-| (Note 2)
V+
+7.0
V-
-7.0
VPUMP
+13
-0.3 ~ +6.0
V
T_IN, SHDN, EN
Input Voltages
VIN
R_IN
±25
±13.2
V
V
V
T_OUT
R_OUT,
T_OUT
Output Voltages
VOUT
-0.3 ~ (VCC+0.3)
Continuous
870
Short-Circuit Duration
Power Dissipation(TA=25°C)
Operating Temperature
Storage Temperature
SC
PD
mW
°C
TOPR
TSTG
-40 ~ +85
-65 ~ +150
°C
Notes: 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. V+ and V- can have maximum magnitudes of 7.0V, but their absolute difference cannot exceed 13V.
ELECTRICAL CHARACTERISTICS
(VCC=+5V, C1~C4=0.1µF, TA = TMIN to TMAX, unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
DC CHARACTERISTICS
Supply Current, Shutdown
ISHDN
ICC
15
11
50
20
µA
SHDN=0V, EN=0V or VCC
SHDN=VCC, EN=0V or VCC
TA= 25°C
VCC Supply Current
mA
LOGIC INPUTS
Low
Input Logic Threshold
High
VLGL
0.8
V
T_IN, SHDN, EN
VLGH
IPullup
2.4
3.5
V
T_IN, SHDN, EN, VCC=5V
T_IN=0V
Logic Pullup Current
RECEIVER OUTPUTS
Output Leakage Current
15
200
µA
EN=0V,0V≤ROUT≤VCC
IROUT(LK)
0.05 ±10
0.4
µA
V
Low
Output Voltage
High
VROUTL IOUT = 1.6mA
VROUTH IOUT = -1.0mA
V
RECEIVER INPUTS
Input Voltage Range
VRR
-30
0.8
30
V
V
Active mode
Shutdown mode
R4, R5
1.2
Input Threshold Low
Input Threshold High
VRINL
TA=25°C
TA=25°C
0.6
1.5
Active mode
Shutdown mode
R4, R5
1.7
1.5
2.4
2.4
VRINH
V
Input Hysteresis
VRINHYS no Hysteresis in shutdown
VRINRES TA=25°C
0.2
3
0.5
5
1.0
7
V
Input Resistance
kΩ
TRANSMITTER OUTPUTS
All transmitter outputs loaded with 3kΩ to
ground
Output Voltage Swing
VTOUTSW
±5.0 ±5.4
300 10M
V
VCC= V+=V-=0V,
Transmitter output=±2V
Output Resistance
VTOUTRES
ITSC
Ω
Output Short-Circuit Current
Output Leakage Current
±10 ±60 mA
±25 µA
VCC=5.0V, VOUT=±12V,
Transmitters disabled
ITOUT(L)
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UT213
CMOS IC
ELECTRICAL CHARACTERISTICS (Cont.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
TIMING CHARACTERISTICS
RL=3kΩ to 7kΩ
Maximum Data Rate
DR
CL=50pf to 1000pF
one transmitter switching
120
kbps
µs
TDR1
TDR2
4
40
10
SHDN=0V, R4,R5
SHDN=VCC
Receiver Propagation Delay
0.5
Enable
Receiver Output Time
Disable
tR(EN)
tR(DIS)
tTS
600
200
300
ns
ns
ns
Normal operation
Transmitter Skew
|tPHL – tPLH|
TA=25°C,
RL=3kΩ~7kΩ,
measured from +3V ~
-3V or -3V~+3V
Transition-Region Slew Rate
SR
CL=50pF~2500pF
15
V/µs
Note: Typical values are at TA=25°C.
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UT213
CMOS IC
DETAILED DESCRIPTION
Charge-Pump Voltage Converter
The UTC UT213 consists of a regulated dual charge pumps that provide output voltages of +5.5V and -5.5V,
regardless of the input voltage (VCC) changing from +4.5V to +5.5V.
The charge pumps operate in a discontinuous mode: if the output voltages are less than 5.5V, the charge pumps
are enabled; if the output voltages exceed 5.5V, the charge pumps are disabled.
Each charge pump requires a flying capacitor (C1, C2) and a reservoir capacitor (C3, C4) to generate the V+ and
V- supplies, refer to application circuit.
RS-232 Transmitters
UTC UT213’s transmitters are inverting level translators that convert CMOS-logic levels to 5.0V EIA/TIA-232 levels.
They guarantee a 120kbps data rate when VCC=5V with worst-case loads of 3kΩ in parallel with 1000pF, providing
compatibility with PC-to-PC communication software.
Input thresholds are both CMOS and TTL compatible. The inputs of unused drivers can be left unconnected since
400kΩ pullup resistors to VCC are included on-chip. Since all drivers invert, the pullup resistors force the outputs of
unused drivers low. The input pullup resistors typically source 15μA; therefore, the driver inputs should be driven
high or open circuited to minimize power-supply current in shutdown mode.
RS-232 Receivers
The UTC UT213’s receivers convert RS-232 signals to CMOS logic output levels. Receiver outputs are inverting,
maintaining compatibility with driver outputs. The guaranteed receiver input thresholds of +0.8V and +2.4V are
significantly tighter than the Q3.0V threshold required by the EIA/TIA-232E specification. This allows receiver inputs
to respond to TTL/CMOS logic levels and improves noise margin for RS-232 levels.
Receiver inputs have approximately +0.5V hysteresis. This provides clean output transitions, even with slow rise
and fall time input signals with moderate amounts of noise and ringing. In shutdown, the UTC UT213’s receivers R4
and R5 have no hysteresis.
During normal operation, the UTC UT213’s receiver propagation delay is typically 1us. When entering shutdown
with receivers active, R4 and R5 are not valid until 80Fs after SHDN is driven low. In shutdown mode, propagation
delays increase to 4us for a high-to-low or a low-to-high transition.
Shutdown Function
In shutdown mode, the UTC UT213’s charge pumps are turned off, V+ is pulled down to VCC, V- is pulled to
ground, and the transmitter outputs are disabled. This reduces supply current typically to 15μA. The time required to
exit shutdown is 1ms, All receivers except R4 and R5 on the UTC UT213 are put into a high-impedance state in
shutdown mode. The UTC UT213’s R4 and R5 receivers still function in shutdown mode. These two receivers are
useful for monitoring external activity while maintaining minimal power consumption.
The enable control is used to put the receiver outputs into a high-impedance state, so that the receivers can be
connected directly to a three-state bus. It has no effect on the RS-232 drivers or on the charge pumps.
Table 1. Shutdown Logic Control Truth Table
EN
OPERATION STATUS
Shutdown
TRANSMITTERS T1–T4
R1, R2, R3
R4, R5
SHDN
0
0
1
1
0
1
0
1
High-Z
High-Z
Active
Active
High-Z
High-Z
High-Z
Active
High-Z
Active*
High-Z
Active
Shutdown
Normal operation
Normal operation
* Active with reduced performance.
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UT213
CMOS IC
TYPICAL APPLICATION CIRCUIT
5V
CBYPASS
VCC
C1+
V+
V-
C1
C3
C4
C1-
C2+
UTC
UT213
C2
C2-
VCC
VCC
VCC
VCC
400kΩ
400kΩ
400kΩ
400kΩ
T1IN
T2IN
T3IN
T4IN
T1OUT
T2OUT
T3OUT
T4OUT
T1
T2
T3
T4
SHDN
SHUTDOWN
EN
R1
R2
R3
R4
R5
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
R1IN
R2IN
R2IN
R4IN
R5IN
5kΩ
5kΩ
5kΩ
5kΩ
5kΩ
GND
Table 2. Required Capacitor Value
VCC (V)
4.5~5.5
C1, C2, C3, C4 (µF)
0.1
CBYPASS (µF)
0.047
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UT213
CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all UTC products described or contained herein.
UTC products are not designed for use in life support appliances, devices or systems where malfunction
of these products can be reasonably expected to result in personal injury. Reproduction in whole or in
part is prohibited without the prior written consent of the copyright owner. UTC reserves the right to
make changes to information published in this document, including without limitation specifications and
product descriptions, at any time and without notice. This document supersedes and replaces all
information supplied prior to the publication hereof.
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