CDP1872CE datasheet(1/6 Pages) INTERSIL

Part #	CDP1872CE

Description	High-Speed 8-Bit Input and Output Ports

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Manufacturer	INTERSIL [Intersil Corporation]

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CDP1872C,

CDP1874C, CDP1875C

High-Speed 8-Bit Input and Output Ports

Description

The CDP1872C, CDP1874C and CDP1875C devices are

high-speed 8-bit parallel input and output ports designed for

use in the CDP1800 microprocessor system and for general

use in other microprocessor systems. The CDP1872C and

CDP1874C are 8-bit input ports; the CDP1875C is an 8-bit

output port.

These devices have ﬂexible capabilities as buffers and data

latches and are reset by CLR input when the data strobe is

not active.

The CDP1872C and CDP1874C are functionally identical

except for device selects.The CDP1872C has one active low

and one active high select; the CDP1874C has two active

high device selects. These devices also feature Three-state

outputs when deselected. Data is strobed into the register on

the leading edge of the CLOCK and latched on the trailing

edge of the CLOCK.

The CDP1875C is an output port with data latched into the

registers when the device selects are active. There are two

active high and one active low selects. The output buffers

are enabled at all times.

Features

• Parallel 8-Bit Input/Output Register with Buffered Out-

puts

• High-Speed Data-In to Data-Out 85ns (Max) at VDD = 5V

• Flexible Applications In Microprocessor Systems as

Buffers and Latches

• High Order Address-Latch Capability in CDP1800-

Series Microprocessor Systems

• Output Sink Current = 5mA (Min) at VDD = 5V

• Three-State Output - CDP1872C and CDP1874C

Ordering Information

PART

NUMBER

TEMP. RANGE

PACKAGE

PKG.

NO.

CDP1872CE

-40oC to +85oC

PDIP

E22.4

CDP1874CE

-40oC to +85oC

PDIP

E22.4

CDP1875CE

-40oC to +85oC

PDIP

E22.4

March 1997

File Number

1255.2

CDP1874C INPUT PORT

(PDIP)

TOP VIEW

1

11

10

9

8

7

6

5

3

2

4

22

12

13

14

15

16

17

18

19

21

20

DI0

DO0

DI1

D01

DI2

D02

D03

DI3

CLOCK

VSS

DI7

DI6

D06

DI5

D07

D05

DI4

D04

CLR

CS2

CS1

VDD

CDP1875C OUTPUT PORT

(PDIP)

TOP VIEW

1

11

10

9

8

7

6

5

3

2

4

22

12

13

14

15

16

17

18

19

21

20

DI0

DO0

DI1

D01

DI2

D02

D03

DI3

CS3

VSS

DI7

DI6

D06

DI5

D07

D05

DI4

D04

CLR

CS2

CS1

VDD

Pinouts

CDP1872C INPUT PORT

(PDIP)

TOP VIEW

1

11

10

9

8

7

6

5

3

2

4

22

12

13

14

15

16

17

18

19

21

20

DI0

DO0

DI1

D01

DI2

D02

D03

DI3

CLOCK

VSS

DI7

DI6

D06

DI5

D07

D05

DI4

D04

CLR

CS2

CS1

VDD

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

http://www.intersil.com or 407-727-9207

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