Philips 74abt2952 DATASHEETS

INTEGRATED CIRCUITS

74ABT2952

Octal registered transceiver (3-State)

Product specification
Supersedes data of 1995 Jun 15

IC23 Data Handbook




1998 Feb 11

Philips Semiconductors Product specification

74ABT2952Octal registered transceiver (3-State)

FEA TURES

•8-bit registered transceiver

•Independent registers for A and B buses

•Output capability: +64mA/–32mA

•Latch-up protection exceeds 500mA per JEDEC Std 17

•ESD protection exceeds 2000V per MIL STD 883 Method 3015

and 200V per Machine Model

•Power-up 3-State

•Power-up reset

DESCRIPTION

The 74ABT2952 high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed and high
output drive.

The 74ABT2952 device is an 8-bit registered 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
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.

) is Low. The data is then present at the 3-State

•Live insertion/extraction permitted

QUICK REFERENCE DATA

SYMBOL PARAMETER

t

PLH

t

PHL

C
C
I

CCZ

IN

I/O

Propagation delay
CPBA to An or

CL = 50pF; VCC = 5V 5.7 ns

CPAB to Bn
Input capacitance VI = 0V or V
I/O capacitance Outputs disabled; VO = 0V or V
Total supply current Outputs disabled; VCC =5.5V 110 µA

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER

24-Pin Plastic DIP –40°C to +85°C 74ABT2952 N 74ABT2952 N SOT222-1
24-Pin plastic SO –40°C to +85°C 74ABT2952 D 74ABT2952 D SOT137-1
24-Pin Plastic SSOP Type II –40°C to +85°C 74ABT2952 DB 74ABT2952 DB SOT340-1
24-Pin Plastic TSSOP Type I –40°C to +85°C 74ABT2952 PW 7ABT2952PW DH SOT355-1

CONDITIONS

T

= 25°C; GND = 0V

amb

CC

CC

TYPICAL UNIT

4 pF
7 pF

PIN CONFIGURATION

V

1

B7

2

B6

3

B5

4

B4

5

B3

6

B2

7

B1

8

B0

9

OEAB

10 15

CPAB

11 14CEAB
12 13GND

1998 Feb 1 1 853-1554 18949

24
23
22
21
20
19
18
17
16

SA00114

CC

A7
A6
A5
A4
A3
A2
A1
A0
OEBA
CPBA
CEBA

PIN DESCRIPTION

PIN

NUMBER

10, 14

11, 13

16, 17, 18,
19, 20, 21,

22, 23

1, 2, 3, 4, 5,

6, 7, 8

9, 15

12 GND Ground (0V)
24 V

2

SYMBOL NAME AND FUNCTION

CPAB /

CPBA

CEAB /

CEBA

Clock input A to B / Clock input B to A
Clock enable input A to B / Clock

enable input B to A

A0 – A7 Data inputs/outputs (A side)

B0 – B7 Data outputs/outputs (B side)

OEAB /

OEBA

Output enable inputs

Positive supply voltage

CC

Philips Semiconductors Product specification

74ABT2952Octal registered transceiver (3-State)

LOGIC SYMBOL

16 17 18 19 20 21 22 23

A0 A1 A2 A3 A4 A5 A6 A7

10

CPAB

11

CEAB

14

CPBA

13

CEBA

B0 B1 B2 B3 B4 B5 B6 B7

87654321

LOGIC SYMBOL (IEEE/IEC)

11
13
15

9
10
14

EN1
EN2
EN3

EN4

C5
C6

OEBA
OEAB

SA00115

FUNCTION TABLE for Register An or Bn

INPUTS

An or Bn CPXX CEXX

X X H NC Hold data
L

15

9

H

H = High voltage level

↑
↑

L =Low voltage level
↑ =Low–to–High transition
X = Don’t care
XX= AB or BA
NC=No change

INTERNAL OPERATING

Q MODE

L
L

L

H

Load data

FUNCTION TABLE for Output Enable

INPUTS

OEXX

H X Z Disable outputs
L

L

H = High voltage level
L =Low voltage level
X = Don’t care
XX= AB or BA
Z =High impedance “off” state

INTERNAL An or Bn OPERATING

Q OUTPUTS MODE

L

H

L

H

Enable outputs

16
17
18
19
20
21
22
23

1, 4, 52, 3, 6

ABSOLUTE MAXIMUM RATINGS

SYMBOL

V

CC

I

IK

V

I

I

OK

V

OUT

I

OUT

T

stg

DC supply voltage –0.5 to +7.0 V
DC input diode current VI < 0 –18 mA
DC input voltage
DC output diode current VO < 0 –50 mA
DC output voltage
DC output current output in Low state 128 mA
Storage temperature range –65 to 150 °C

PARAMETER CONDITIONS RATING UNIT

3

3

1, 2

8
7
6
5
4
3
2
1

SA00116

–1.2 to +7.0 V

output in Off or High state –0.5 to +5.5 V

NOTES:

1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the
device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to
absolute-maximum-rated conditions for extended periods may affect device reliability .

2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.

3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

1998 Feb 1 1

3

Philips Semiconductors Product specification

SYMBOL

PARAMETER

UNIT

74ABT2952Octal registered transceiver (3-State)

LOGIC DIAGRAM

11

CEAB

10

CPAB

9

OEAB

DETAIL A

CE

CP

Q

CE

Q

D

CP

8

B0

16

A0

D

17

A1

18

A2

19

A3

CEBA

CPBA

OEBA

20

A4

21

A5

22

A6

23

A7

13

14

15

DETAIL A X 7

RECOMMENDED OPERATING CONDITIONS

LIMITS

Min Max

V

CC

V
V
V
I

OH

I

OL

∆t/∆v Input transition rise or fall rate 0 10 ns/V
T

amb

DC supply voltage 4.5 5.5 V
Input voltage 0 V

I

High-level input voltage 2.0 V

IH

Low-level Input voltage 0.8 V

IL

High-level output current –32 mA
Low-level output current 64 mA

Operating free-air temperature range –40 +85 °C

CC

7

B1

6

B2

5

B3

4

B4

3

B5

2

B6

1

B7

SA00117

V

1998 Feb 1 1

4