March 1998

Revised April 1999

© 1999 Fairchild Semiconductor Corporation

DS500143.prf

www.fairchildsemi.com

74VCX16721

Low Voltage 20-Bit D-Type Flip-Flops with 3.6V Tolerant

Inputs and Outputs

General Description

The VCX16721 contains twenty non-inverting D-type flip-

flops with 3-STATE outputs and is intended for bus oriented

applications.

The 74VCX16721 is designed for low voltage (1.65V to

The 74VCX16721 is fabricated with an advanced CMOS

technology to achieve high speed operation while maintain-

ing low CMOS power dissipation.

Features

s 3.6V tolerant inputs and outputs

s Power-off high impedance inputs and outputs

s Supports live insertion and withdrawal (Note 1)

±24 mA @ 3.0V V

CC

±18 mA @ 2.3V V

CC

±6 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:

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

Logic Symbol

Pin Descriptions

Order Number

Package Number

Package Description

74VCX16721MTD

MTD56

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

Pin Names

Description

OE

Output Enable Input (Active LOW)

CLK

Clock Input

Inputs

Outputs

CE

Clock Enable Input (Active LOW)