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WS82C55A-5P Datasheet

  • WS82C55A-5P

  • CMOS Programmable peripheral Interface

  • 25頁

  • WINGS

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CMOS Programmable peripheral
Interface
Features
鈥?Pin Compatible with NMOS 8255A
鈥?24 Programmable I/O Pins
鈥?Fully TTL Compatible
鈥?High Speed, No 鈥淲ait State鈥?Operation with 5MHz
80C86 and 8MHz 80C88
鈥?Direct Bit Set/Reset Capability
鈥?Enhanced Control Word Read Capability
鈥?L7 Process
鈥?2.5mA Drive Capability on All I/O Ports
鈥?Low Standby Power (ICCSB) . . . . . . . . . . . . . . . . .10碌A
WS82C55A
Description
The WS82C55A is a high performance CMOS version of
the industry standard 8255A and is manufactured using a
self-aligned silicon gate CMOS process (Scaled SAJI IV). It
is a general purpose programmable I/O device which may be
used with many different microprocessors. There are 24 I/O
pins which may be individually programmed in 2 groups of
12 and used in 3 major modes of operation. The high
performance and industry standard con鏗乬uration of the
WS82C55A
make it compatible with the 80C86, and
other microprocessors.
Static CMOS circuit design insures low operating power. TTL
compatibility over the full military temperature range and bus
hold circuitry eliminate the need for pull-up resistors. The
advanced SAJI process results in performance equal
to or greater than existing functionally equivalent products at
a fraction of the power.
SPEED
8MHz
8MHz
Ordering Information
PART NUMBERS
SPEED
PART NUMBERS
TEMPERATURE
RANGE
o
PKG.
40DIP
WS82C55A-5P
5MHz
WS82C55AP
0 C to 70 C
o
o
WS82C55A-5C
WS82C55A-5Q
5MHz
5MHz
WS82C55AC
WS82C55AQ
0 C to 70 C
o
44 PLCC
8MHz
0 C to 70 C
o
o
44 QFP
Pinouts
44
RD
43 PA
0
42 PA
1
41 PA
2
40 PA
3
38 PA
4
37 PA
5
36 PA
6
35 PA
7
34
WR
39 V
CC
PA3
PA2
PA1
PA0
RD
CS
GND
A1
A0
PC7
PC6
PC5
PC4
PC0
PC1
PC2
PC3
PB0
PB1
PB2
40
39
38
37
36
5
35
6
7
WS82C55A-5P
34
8
WS82C55AP
33
32
9
10
31
11
30
12
29
1
2
3
4
13
14
15
16
17
18
19
20
PA4
PA5
PA6
CS
1
PA7
WR
GND 2
RESET
A
1
3
D0
A
0
4
D1
PC
7
5
D2
PC
6
6
D3
D4
PC
5
7
D5
PC
4
8
D6
PC
0
9
D7
PC
1
10
V
CC
PC
2
11
PB7
PB6
PB5
PB4
PB3
RD
PA0
PA1
PA2
PA3
NC
PA4
PA5
PA6
PA7
WR
6 5 4 3 2 1 44 43 42 41 40
WS82C55A-5Q
WS82C55AQ
QFP-44
DIP-40
28
27
26
25
24
23
22
21
PC2
PC3
PB0
PB1
PB
0
14
PB
1
15
PB
2
16
V
CC
17
PB
3
18
PB
4
19
PB
5
20
PB
6
21
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
NC 12
PC
3
13
1
Wing Shing Computer Components Co., (H.K.)Ltd.
Homepage:
http://www.wingshing.com
Tel:(852)2341 9276 Fax:(852)2797 8153
E-mail: wsccltd@hkstar.com
NC 22
PB2
NC
PB3
PB4
PB5
PB6
PB7
33
32
31
30
29
28
27
26
25
24
23
RESET
D
0
D
1
D
2.
D
3
D
4
D
5
D
6
D
7
V
CC
PB
7
CS
GND
A1
A0
PC7
NC
PC6
PC5
PC4
PC0
PC1
7
8
9
10
11
12
13
14
15
16
17
WS82C55A-5C
WS82C55AC
PLCC-44
39
38
37
36
35
34
33
32
31
30
29
RESET
D0
D1
D2
D3
NC
D4
D5
D6
D7
V
CC
18 1920 21 22 23 24 25 26 27 28

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