74F598 Datasheet | Philips Semiconductors

FEATURES - High impedance PNP base input for reduced loading (20µA in High and Low states) - 8- bit parallel storage register - Shift register has asynchronous direct overriding reset - Shift load SHLD is functional when SHCP is Low and locked out when SHCP is High. - Guaranteed shift frequency DC to 105MHz - Parallel 3- State I/O storage register inputs and shift register parallel outputs The shift register load function has been modified to load when both SHLD and SHCP are Low. When SHCP is High the shift register load operation is not performed. Data will be properly shifted on the rising edge of SHCP when SHLD is High. TYPE 74F598 TYPICAL SHCP fmax 100MHz TYPICAL SUPPLY CURRENT (TOTAL) 75m A ORDERING INFORMATION ORDER CODE DESCRIPTION MERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C N74F598N N74F598D PKG DWG # DESCRIPTION The 74F598 consists of an 8- bit storage register feeding a parallel- in/serial- in, parallel- out/serial- out 8- bit shift register. Both the storage register and shift register have positive edge- triggered clocks. The shift register has asynchronous reset and when SHCP is Low, it has asynchronous load. 20- pin plastic DIP 20- pin plastic SOL SOT146-1 SOT163-1 INPUT AND OUTPUT LOADING AND FAN OUT TABLE PINS I/On Ds0, Ds1 SHCP STCP SHCPEN SHLD SHRST S OE Qs Parallel data input Serial data inputs Shift register clock pulse input Storage register clock pulse input Shift register clock pulse enable input Shift register load input (active Low) Shift register reset input (active Low) Serial data select input Output enable input Serial data output DESCRIPTION 74F (U.L.) High/ Low 1.0/0.033 1.0/0.033 1.0/0.033 1.0/0.033 1.0/0.033 1.0/0.033 1.0/0.033 1.0/0.033 1.0/0.033 50/33 150/40 LOAD VALUE High/Low 20µA/20µA 20µA/20µA 20µA/20µA 20µA/20µA 20µA/20µA 20µA/20µA 20µA/20µA 20µA/20µA 20µA/20µA 1.0m A/20m A 3.0m A/24m A I/On Parallel data outputs Note to input and output loading and fan out table 1. One (1.0) FAST unit load is defined as: 20µA in the High state...