74LVT2952 查看數據表（PDF） - Philips Electronics

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74LVT2952

3.3V LVT octal registered transceiver (3-State)

Philips Electronics 

Philips Semiconductors

3.3V Octal registered transceiver (3-State)

Product specification

74LVT2952

FEATURES

• 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

DESCRIPTION

The LVT2952 is a high-performance BiCMOS product designed for

VCC operation at 3.3V.

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) 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

tPLH

tPHL

CIN

CI/O

ICCZ

Propagation delay

CPBA to An or

CPAB to Bn

Input capacitance

I/O pin capacitance

Total supply current

CONDITIONS

Tamb = 25°C; GND = 0V

CL = 50pF; VCC = 3.3V

VI = 0V or 3.0V

Outputs disabled; VI/O = 0V or 3.0V

Outputs disabled; VCC = 3.6V

TYPICAL

3.1

3.8

4

8

0.13

UNIT

ns

pF

pF

mA

ORDERING INFORMATION

PACKAGES

24-Pin Plastic SOL

24-Pin Plastic SSOP Type II

24-Pin Plastic TSSOP Type I

TEMPERATURE RANGE

–40°C to +85°C

–40°C to +85°C

–40°C to +85°C

OUTSIDE NORTH AMERICA

74LVT2952 D

74LVT2952 DB

74LVT2952 PW

NORTH AMERICA

74LVT2952 D

74LVT2952 DB

7LVT2952PW DH

DWG NUMBER

SOT137-1

SOT340-1

SOT355-1

PIN CONFIGURATION

B7 1

B6 2

B5 3

B4 4

B3 5

B2 6

B1 7

B0 8

OEAB 9

CPAB 10

CEAB 11

GND 12

24 VCC

23 A7

22 A6

21 A5

20 A4

19 A3

18 A2

17 A1

16 A0

15 OEBA

14 CPBA

13 CEBA

SV00036

PIN DESCRIPTION

PIN

NUMBER

SYMBOL

10, 14 CPAB / CPBA

11, 13 CEAB / CEBA

16, 17, 18,

19, 20, 21,

22, 23

A0 – A7

8, 7, 6, 5,

4, 3, 2, 1

B0 – B7

9, 15 OEAB / OEBA

12

GND

24

VCC

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

Data inputs/outputs (A side)

Data outputs/outputs (B side)

Output enable inputs

Ground (0V)

Positive supply voltage

1998 Feb 19

2

853-1765 18987

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