HOLTEK HT6571

HT6571
Multiple RS-232 Drivers and Receivers
Features
· Single-chip with easy interface between UART and
· Driver current-limited output: 25mA typ.
serial port connector
· Flexible supply voltage range
· Three drivers and five receivers meet or exceed the
· ESD protection exceeds 5kV
requirements of EIA/TIA-232-D
· 20-pin SOP package
· Designed to support data rates up to 120 Kbit/s
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 circuit-terminating equipment (DCE).
Block Diagram
Pin Assignment
R A 1
R A 2
R A 3
D Y 1
R Y 1
R Y 2
R Y 3
D A 1
D Y 2
D A 2
R A 4
R Y 4
D Y 3
D A 3
R A 5
R Y 5
V D D
1
2 0
V C C
R A 1
2
1 9
R Y 1
R A 2
3
1 8
R Y 2
R A 3
4
1 7
R Y 3
D Y 1
5
1 6
D A 1
D Y 2
6
1 5
D A 2
R A 4
7
1 4
R Y 4
D Y 3
8
1 3
D A 3
R A 5
9
1 2
R Y 5
V S S
1 0
1 1
G N D
H T 6 5 7 1
2 0 S O P -A
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 ²Absolute Maximum Ratings² 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 reliability.
Rev. 1.20
1
August 20, 2002
HT6571
Electrical Characteristics
Symbol
Paremeter
Test Conditions
VDD
VCC
Conditions
Min.
Typ.
Max.
Unit
VDD
Operation Voltage
¾
¾
¾
7.5
9
15
V
VSS
Operation Voltage
¾
¾
¾
-7.5
-9
-15
V
VCC
Operation Voltage
¾
¾
¾
4.5
5
5.5
V
VIH1
Driver Input High
12V
5V
2
¾
¾
V
VIL1
Driver Input Low
12V
5V
¾
¾
0.8
V
VIH2
Receiver Input High
12V
5V
3
¾
¾
V
VIL2
Receiver Input Low
12V
5V
¾
¾
0
V
IOH1
Receiver Output Source Current
12V
5V
VO=2.4V
-1
-2
-3
mA
IOL1
Receiver Output Sink Current
12V
5V
VO=0.4V
+1
+2
+3
mA
IOS(H)
High-level Driver Short Current
12V
5V
VO=0V
-15
-25
-35
mA
IOS(L)
Low-level Driver Short Current
12V
5V
VO=0V
15
25
35
mA
SR1
Slew Rate
12V
5V
RL=7kW, C1=330pF
¾
¾
30
V/ms
Rev. 1.20
2
August 20, 2002
HT6571
Application Circuits
Rev. 1.20
3
August 20, 2002
HT6571
,
, Rev. 1.20
4
August 20, 2002
HT6571
Package Information
20-pin SOP (300mil) outline dimensions
1 1
2 0
A
B
1
1 0
C
C '
G
H
D
E
Symbol
Rev. 1.20
=
F
Dimensions in mil
Min.
Nom.
Max.
A
394
¾
419
B
290
¾
300
C
14
¾
20
C¢
490
¾
510
D
92
¾
104
E
¾
50
¾
F
4
¾
¾
G
32
¾
38
H
4
¾
12
a
0°
¾
10°
5
August 20, 2002
HT6571
Product Tape and Reel Specifications
Reel dimensions
,
6
)
+
*
6 SOP 20W
Symbol
Description
Dimensions in mm
A
Reel Outer Diameter
330±1.0
B
Reel Inner Diameter
62±1.5
C
Spindle Hole Diameter
13.0+0.5
-0.2
D
Key Slit Width
2.0±0.5
T1
Space Between Flange
24.8+0.3
-0.2
T2
Reel Thickness
30.2±0.2
Rev. 1.20
6
August 20, 2002
HT6571
Carrier tape dimensions
P 0
D
P 1
t
E
F
W
C
D 1
B 0
P
K 0
A 0
SOP 20W
Symbol
Description
Dimensions in mm
24.0+0.3
-0.1
W
Carrier Tape Width
P
Cavity Pitch
12.0±0.1
E
Perforation Position
1.75±0.1
F
Cavity to Perforation (Width Direction)
11.5±0.1
D
Perforation Diameter
1.5+0.1
D1
Cavity Hole Diameter
1.5+0.25
P0
Perforation Pitch
4.0±0.1
P1
Cavity to Perforation (Length Direction)
2.0±0.1
A0
Cavity Length
10.8±0.1
B0
Cavity Width
13.3±0.1
K0
Cavity Depth
3.2±0.1
t
Carrier Tape Thickness
0.3±0.05
C
Cover Tape Width
Rev. 1.20
21.3
7
August 20, 2002
HT6571
Holtek Semiconductor Inc. (Headquarters)
No.3, Creation Rd. II, Science-based Industrial Park, Hsinchu, Taiwan
Tel: 886-3-563-1999
Fax: 886-3-563-1189
http://www.holtek.com.tw
Holtek Semiconductor Inc. (Sales Office)
11F, No.576, Sec.7 Chung Hsiao E. Rd., Taipei, Taiwan
Tel: 886-2-2782-9635
Fax: 886-2-2782-9636
Fax: 886-2-2782-7128 (International sales hotline)
Holtek Semiconductor (Shanghai) Inc.
7th Floor, Building 2, No.889, Yi Shan Rd., Shanghai, China
Tel: 021-6485-5560
Fax: 021-6485-0313
http://www.holtek.com.cn
Holtek Semiconductor (Hong Kong) Ltd.
RM.711, Tower 2, Cheung Sha Wan Plaza, 833 Cheung Sha Wan Rd., Kowloon, Hong Kong
Tel: 852-2-745-8288
Fax: 852-2-742-8657
Holmate Semiconductor, Inc.
48531 Warm Springs Boulevard, Suite 413, Fremont, CA 94539
Tel: 510-252-9880
Fax: 510-252-9885
http://www.holmate.com
Copyright Ó 2002 by HOLTEK SEMICONDUCTOR INC.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used
solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable
without further modification, nor recommends the use of its products for application that may present a risk to human life
due to malfunction or otherwise. Holtek reserves the right to alter its products without prior notification. For the most
up-to-date information, please visit our web site at http://www.holtek.com.tw.
Rev. 1.20
8
August 20, 2002