© 2000 Fairchild Semiconductor Corporation

DS500045

www.fairchildsemi.com

August 1997

Revised July 2000

74VCX162838

Low Voltage 16-Bit Selectable Register/Buffer

with 3.6V Tolerant Inputs and Outputs

and 26

Ω Series Resistors in the Outputs

General Description

The VCX162838 contains sixteen non-inverting selectable

buffered or registered paths. The device can be configured

to operate in a registered, or flow through buffer mode by

utilizing the register enable (REGE) and Clock (CP) sig-

nals. The device operates in a 16-bit word wide mode. All

outputs can be placed into 3-State through the use of the

OE pin. These devices are ideally suited for buffered or

registered 168 pin and 200 pin SDRAM DIMM memory

modules.

The 74VCX162838 is designed for low voltage (1.65V to

The VCX162838 is also designed with 26

Ω series resistors

in the outputs. This design reduces line noise in applica-

tions such as memory address drivers, clock drivers, and

bus transceivers/transmitters.

The 74VCX162838 is fabricated with an advanced CMOS

technology to achieve high speed operation while maintain-

ing low CMOS power dissipation.

Features

s Compatible with PC100 and PC133 DIMM module

specifications

s 3.6V tolerant inputs and outputs

s 26

Ω series resistors in the outputs

s Power-off high impedance inputs and outputs

s Supports live insertion and withdrawal (Note 1)

±12 mA @ 3.0V V

CC

±8 mA @ 2.3V V

CC

±3 mA @ 1.65V V

CC

s Uses patented noise/EMI reduction circuitry

s Latch-up performance exceeds 300 mA

s ESD performance:

Human body model

> 2000V

Machine model

> 200V

Note 1: To ensure the high-impedance state during power up or power

value of the resistor is determined by the current -sourcing capability of the

driver.

Ordering Code:

Devices also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering code.

Logic Symbol

Pin Descriptions

Ordering Code

Package Number

Package Descriptions

74VCX162838MTD

MTD48

48-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 6.1mm Wide

Pin Names

Description

OE

Output Enable Input (Active LOW)

Inputs

Outputs

CP

Clock Pulse Input

REGE

Register Enable Input