74F655A Datasheet | Philips Semiconductors

FEATURES 74F655A- 74F656A - Significantly improved AC performance over 74F655 and 74F656 - High impedance NPN base input for reduced loading (40µA in High and Low states) DESCRIPTION The 74F655A and 74F656A are octal buffers and line drivers with parity generation/checking designed to be employed as memory address drivers, clock drivers and bus-oriented transmitters/receivers. These parts include parity generator/checker to improve PC board density. TYPICAL PROPAGATION DELAY 6.5ns 6.5ns - Ideal in applications where high output drive and light bus loading - 74F655A bines 74F240 and 74F280A functions in one package are required (IIL is 40µA vs. FAST std of 600µA) TYPE 74F655A 74F656A TYPICAL SUPPLY CURRENT (TOTAL) 64m A 64m A - 74F656A bines 74F244 and 74F280A functions in one package - 74F655A Inverting - 74F656A Non-inverting - 3-State outputs sink 64m A and source 15m A - 24-pin plastic Slim DIP (300mil) package - Inputs on one side and outputs on the other side simplifies PC board layout - bined functions reduce part count and enhance system performance - Industrial temperature range available (- 40°C to +85°C) ORDERING INFORMATION DESCRIPTION 24-pin Plastic Slim DIP (300mil) 24-pin Plastic SOL MERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C N74F656AN N74F656AD INDUSTRIAL RANGE VCC = 5V ±10%, Tamb = - 40°C to +85°C I74F656AN I74F656AD PKG DWG # SOT222-1 SOT137-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS D0- D7 PI OE0, OE1, OE2 ΣE, ΣO Q0- Q7 Q0- Q7 Data inputs Parity input Output Enable Inputs (active Low) Parity outputs Data outputs (74F655A) Data outputs (74F656A) DESCRIPTION 74F(U.L.) HIGH/LOW 2.0/0.066 1.0/0.033 1.0/0.033 750/106.7 750/106.7 750/106.7 LOAD VALUE HIGH/LOW 40µA/40µA 20µA/20µA 20µA/20µA 15m A/64m A 15m A/64m A 15m A/64m A NOTE: One (1.0) FAST Unit Load (U.L.) is defined as: 20µA in the High state and 0.6m A in the Low state. - Discontinued part. Please see the Discontinued Products List. 1991 Jul 17 853-0383 03305 Philips...