Philips Semiconductors

Product specification

74ABT2953

Octal registered transceiver, inverting (3-State)

1

1995 Sep 06

853-1555 15702

FEATURES

and 200V per Machine Model

DESCRIPTION

The 74ABT2953 high-performance BiCMOS device combines low

static and dynamic power dissipation with high speed and high

output drive.

The 74ABT2953 device is an 8-bit registered inverting transceiver.

Two 8-bit back-to-back registers store data flowing in both directions

between two bidirectional buses. Data applied to the inputs is

entered and stored on the rising edge of the Clock (CPXX) provided

that the Clock Enable (CEXX) is Low. The data is then present at

the 3-State output buffers, but is only accessible when the Output

Enable (OEXX) is Low. Data flow from A inputs to B outputs is the

same as for B inputs to A outputs.

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

Propagation delay

CPBA to An or CPAB to Bn

5.0

ns

Input capacitance

4

pF

I/O capacitance

Outputs disabled;

7

pF

Total supply current

500

nA

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

OUTSIDE NORTH AMERICA

NORTH AMERICA

DWG NUMBER

24-Pin Plastic DIP

–40

°C to +85°C

74ABT9253 N

74ABT2953 N

SOT222-1

24-Pin plastic SO

–40

°C to +85°C

74ABT2953 D

74ABT2953 D

SOT137-1

24-Pin Plastic SSOP Type II

–40

°C to +85°C

74ABT2953 DB

74ABT2953 DB

SOT340-1

24-Pin Plastic TSSOP Type I

–40

°C to +85°C

74ABT2953 PW

74ABT2953PW DH

SOT355-1

PIN CONFIGURATION

1

2

3

4

5

6

7

8

9

10

15

16

17

18

19

20

21

22

23

24

B7

B6

B5

B4

B3

B2

B1

B0

OEAB

A0

CPAB

A1

A2

A3

A4

A5

A6

A7

VCC

OEBA

11

14

CEAB

CPBA

12

13

GND

CEBA

TOP VIEW

SA00305

PIN DESCRIPTION

PIN NUMBER

SYMBOL

NAME AND FUNCTION

10, 14

CPAB /

CPBA

Clock input A to B / Clock input

B to A

11, 13

CEAB /

CEBA

Clock enable input A to B / Clock

enable input B to A

16, 17, 18, 19,

20, 21, 22, 23

A0 – A7

Data inputs/outputs (A side)

1, 2, 3, 4, 5, 6,

7, 8

B0 – B7

Data outputs/outputs (B side)

9, 15

OEAB /

OEBA

Output enable inputs

12

GND

Ground (0V)

24

Positive supply voltage