HT6571
Multiple RS-232 Drivers and Receivers
Block Diagram
Pin Assignment
Absolute Maximum Ratings
Supply Voltage (VSS VDD) ..........................
-15V~15V
Supply Voltage (GND VCC) .......................
-0.3V~5.5V
Input Voltage Driver .......................................... 0V~7V
Receiver ......................................................
-15V~15V
Output Voltage Driver ..................................
-15V~15V
Receiver ............................................................ 0V~7V
Note: These are stress ratings only. Stresses exceeding the range specified under
Absolute Maximum Ratings may
cause substantial damage to the device. Functional operation of this device at other conditions beyond those
listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliabil-
ity.
Rev. 1.20
1
August 20, 2002
Features
Single-chip with easy interface between UART and
serial port connector
Three drivers and five receivers meet or exceed the
requirements of EIA/TIA-232-D
Designed to support data rates up to 120 Kbit/s
Driver current-limited output: 25mA typ.
Flexible supply voltage range
ESD protection exceeds 5kV
20-pin SOP package
General Description
The HT6571 is a CMOS device containing three RS-232
line drivers, and five RS-232 line receivers that are used
to interface data terminal equipment (DTE) with data cir-
cuit-terminating equipment (DCE).
R A 1
R A 2
R A 3
D Y 1
D Y 2
R A 4
D Y 3
R A 5
R Y 1
R Y 2
R Y 3
D A 1
D A 2
R Y 4
D A 3
R Y 5
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
1
2
3
4
5
6
7
8
9
1 0
V D D
R A 1
R A 2
R A 3
D Y 1
D Y 2
R A 4
D Y 3
R A 5
V S S
V C C
R Y 1
R Y 2
R Y 3
D A 1
D A 2
R Y 4
D A 3
R Y 5
G N D
H T 6 5 7 1
2 0 S O P - A
Electrical Characteristics
Symbol
Paremeter
Test Conditions
Min.
Typ.
Max.
Unit
V
DD
V
CC
Conditions
V
DD
Operation Voltage
7.5
9
15
V
V
SS
Operation Voltage
-7.5
-9
-15
V
V
CC
Operation Voltage
4.5
5
5.5
V
V
IH1
Driver Input High
12V
5V
2
V
V
IL1
Driver Input Low
12V
5V
0.8
V
V
IH2
Receiver Input High
12V
5V
3
V
V
IL2
Receiver Input Low
12V
5V
0
V
I
OH1
Receiver Output Source Current
12V
5V
V
O
=2.4V
-1
-2
-3
mA
I
OL1
Receiver Output Sink Current
12V
5V
V
O
=0.4V
+1
+2
+3
mA
I
OS(H)
High-level Driver Short Current
12V
5V
V
O
=0V
-15
-25
-35
mA
I
OS(L)
Low-level Driver Short Current
12V
5V
V
O
=0V
15
25
35
mA
S
R1
Slew Rate
12V
5V
R
L
=7k
W, C
1
=330pF
30
V/
ms
HT6571
Rev. 1.20
2
August 20, 2002
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