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74VCX16841MTD_Q

Low Voltage 20-Bit Transparent Latch with 3.6V Tolerant Inputs and Outputs

Fairchild Semiconductor 

March 1998

Revised October 2004

74VCX16841

Low Voltage 20-Bit Transparent Latch

with 3.6V Tolerant Inputs and Outputs

General Description

The VCX16841 contains twenty non-inverting latches with

3-STATE outputs and is intended for bus oriented applica-

tions. The device is byte controlled. The flip-flops appear

transparent to the data when the Latch enable (LE) is

HIGH. When LE is LOW, the data that meets the setup time

is latched. Data appears on the bus when the Output

Enable (OE) is LOW. When OE is HIGH, the outputs are in

a high impedance state.

The 74VCX16841 is designed for low voltage (1.4V to

3.6V) VCC applications with I/O compatibility up to 3.6V.

The 74VCX16841 is fabricated with an advanced CMOS

technology to achieve high speed operation while maintain-

ing low CMOS power dissipation.

Features

s 1.4V to 3.6V VCC supply operation

s 3.6V tolerant inputs and outputs

s tPD (Dn to On)

3.0 ns max for 3.0V to 3.6V VCC

s Power-off high impedance inputs and outputs

s Supports live insertion and withdrawal (Note 1)

s Static Drive (IOH/IOL)

±24 mA @ 3.0V VCC

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

down, OE should be tied to VCC through a pull-up resistor; the minimum

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

driver.

Ordering Code:

Order Number Package Number

Package Description

74VCX16841MTD

MTD56

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

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

Logic Symbol

Pin Descriptions

Pin Names

Description

OEn

LEn

D0–D19

O0–O19

Output Enable Input (Active LOW)

Latch Enable Input

Inputs

Outputs

© 2004 Fairchild Semiconductor Corporation DS500132

www.fairchildsemi.com

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