Philips 74LVT2952D, 74LVT2952PW, 74LVT2952DB Datasheet

INTEGRATED CIRCUITS

74LVT2952

3.3V LVT octal registered transceiver
(3-State)

Product specification
Supersedes data of 1994 Sep 27
IC23 Data Handbook




1998 Feb 19

Philips Semiconductors Product specification

74L VT29523.3V Octal registered transceiver (3-State)

FEA TURES

•8-bit registered transceiver

•Independent registers for A and B buses

•Output capability: +64mA/-32mA

•TTL input and output switching levels

•Input and output interface capability to systems at 5V supply

•Bus-hold data inputs eliminate the need for external pull-up

resistors to hold unused inputs

•Live insertion/extraction permitted

•No bus current loading when output is tied to 5V bus

•Power-up reset

•Power-up 3-State

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

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

and 200V per Machine Model

QUICK REFERENCE DATA

SYMBOL PARAMETER

t

PLH

t

PHL

C
C
I

CCZ

IN

I/O

Propagation delay
CPBA to An or
CPAB to Bn

Input capacitance VI = 0V or 3.0V 4 pF
I/O pin capacitance Outputs disabled; V
Total supply current Outputs disabled; VCC = 3.6V 0.13 mA

DESCRIPTION

The LVT2952 is a high-performance BiCMOS product designed for
V

operation at 3.3V .

CC

This device combines low static and dynamic power dissipation with
high speed and high output drive.

The 74LVT2952 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
The data is then present at the 3-State output buffers, but is only
accessible when the Output Enable (OEXX
A inputs to B outputs is the same as for B inputs to A outputs.

CONDITIONS

T

= 25°C; GND = 0V

amb

CL = 50pF; VCC = 3.3V

= 0V or 3.0V 8 pF

I/O

) is Low. Data flow from

TYPICAL UNIT

3.1

3.8

) is Low.

ns

ORDERING INFORMATION

PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER

24-Pin Plastic SOL –40°C to +85°C 74LVT2952 D 74LVT2952 D SOT137-1
24-Pin Plastic SSOP Type II –40°C to +85°C 74LVT2952 DB 74LVT2952 DB SOT340-1
24-Pin Plastic TSSOP Type I –40°C to +85°C 74LVT2952 PW 7LVT2952PW DH SOT355-1

PIN CONFIGURATION

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

SV00036

24

V

CC

23

A7

22

A6

21

A5

20

A4

19

A3

18

A2

17

A1

16

A0
OEBA
CPBA
CEBA

PIN DESCRIPTION

PIN

NUMBER

10, 14 CPAB / CPBA

11, 13 CEAB / CEBA

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

22, 23

8, 7, 6, 5,

4, 3, 2, 1

9, 15 OEAB / OEBA Output enable inputs

12 GND Ground (0V)
24 V

SYMBOL NAME AND FUNCTION

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)

CC

Positive supply voltage

1998 Feb 19 853-1765 18987

2

Philips Semiconductors Product specification

INTERNAL

OPERATING

INTERNAL

An or Bn

OPERATING

74LVT29523.3V Octal registered transceiver (3-State)

LOGIC SYMBOL

16 17 18 19 20 21 22 23

10
11
14
13

LOGIC DIAGRAM

A0 A1 A2 A3 A4 A5 A6 A7
CPAB
CEAB
CPBA
CEBA

B0 B1 B2 B3 B4 B5 B6 B7

87654321

CEAB

CPAB
OEAB

A0

OEBA
OEAB

11

10

9

16

SV00037

LOGIC SYMBOL (IEEE/IEC)

15
13

14

9
11
10

15

9

CE

Q

D

CP

16

17
18
19
20
21
22
23

DETAIL A

EN3 (BA)

G1

1C5

EN4 (AB)

G2

2C6

3
6D

1
1

SV00038

5D

4

8

7
6
5
4
3
2
1

17

A1

18

A2

19

A3

20

A4

21

A5

22

A6

23

A7

13

CEBA

14

CPBA

15

OEBA

FUNCTION TABLE for Register An or Bn

INPUTS

An or Bn CPXX CEXX

X X H NC Hold data
L

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

L
L

L

H

Load data

MODE

CE

Q

D

CP

DETAIL A X 7

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

L

H

8

B0

7

B1

6

B2

5

B3

4

B4

3

B5

2

B6

1

B7

SV00039

OUTPUTS

L

H

MODE

Enable outputs

1998 Feb 19

3

Philips Semiconductors Product specification

I

DC output current

mA

SYMBOL

PARAMETER

UNIT

I

mA

74LVT29523.3V Octal registered transceiver (3-State)

ABSOLUTE MAXIMUM RATINGS

SYMBOL

V

CC

I

IK

V

I

I

OK

V

OUT

OUT

T

stg

DC supply voltage –0.5 to +4.6 V
DC input diode current VI < 0 –50 mA
DC input voltage
DC output diode current VO < 0 –50 mA
DC output voltage

p

Storage temperature range –65 to 150 °C

PARAMETER CONDITIONS RATING UNIT

3

3

1, 2

–0.5 to +7.0 V

Output in Off or High state –0.5 to +7.0 V

Output in High state –64

Output in Low state 128

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 negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.

RECOMMENDED OPERATING CONDITIONS

LIMITS

MIN MAX

V

CC

V

V

V

I

OH

OL

∆t/∆v Input transition rise or fall rate; Outputs enabled 10 ns/V

T

amb

DC supply voltage 2.7 3.6 V
Input voltage 0 5.5 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 32
Low-level output current; current duty cycle ≤ 50%, f ≥ 1kHz 64

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

1998 Feb 19

4