Texas Instruments CY54FCT841T, CY74FCT841T 10-Bit Latches with 3-State Outputs Data Sheet

CY54FCT841T, CY74FCT841T

10-BIT LATCHES WITH 3-STATE OUTPUTS

SCCS035A – SEPTEMBER 1994 – REVISED OCTOBER 2001

Function, Pinout, and Drive Compatible CY54FCT841T D PACKAGE CY74FCT841T P, Q, OR SO PACKAGE

With FCT, F, and AM29841 Logic

(TOP VIEW)

Reduced VOH (Typically = 3.3 V) Versions of Equivalent FCT Functions OE VCC

Edge-Rate Control Circuitry for D0 Y0 Significantly Improved Noise D1 Y1 Characteristics D2 Y2 D3 Y3

Ioff Supports Partial-Power-Down Mode

Operation

Matched Rise and Fall Times

ESD Protection Exceeds JESD 22

– 2000-V Human-Body Model (A114-A)

– 200-V Machine Model (A115-A)

– 1000-V Charged-Device Model (C101)

GND LE

Fully Compatible With TTL Input and Output Logic Levels High-Speed Parallel Latches Buffered Common Latch-Enable Input 3-State Outputs CY54FCT841T – 32-m A Output Sink Current – 12-m A Output Source Current CY74FCT841T – 64-m A Output Sink Current – 32-m A Output Source Current

description The ’FCT841T bus-interface latches are designed to eliminate additional packages required to buffer existing latches and provide additional data width for wider address/data paths or buses carrying parity. The ’FCT841T devices are buffered 10-bit-wide versions of the FCT373 function. The ’FCT841T devices’ high-performance interface is designed for high-capacitance-load drive capability, while providing low-capacitance bus loading at both inputs and outputs. Outputs are designed for low-capacitance bus loading in the high-impedance state. These devices are fully specified for partial-power-down applications using Ioff. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down.

PIN DESCRIPTION

NAME I/O DESCRIPTION

Latch data inputs Latch-enable input. The latches are transparent when LE is high.

Input data is latched on the high-to-low transition. 3-state latch outputs Output-enable control. When OE is low, the outputs are enabled.

When OE is high, the outputs are in the high-impedance (off) state.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright  2001, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments On products compliant to MIL-PRF-38535, all parameters are tested standard warranty. Production processing does not necessarily include unless otherwise noted. On all other products, production testing of all parameters. processing does not necessarily include testing of all parameters.

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