74F410 Datasheet | Philips Semiconductors

FEATURES - Edge triggered output register - ypical access time of 19.5ns - Optimize for register stack operation - 3- state outputs - 18- pin package DESCRIPTION The 74F410 is a register oriented high speed 64- bit read/write memory organized as 16- words by 4- bits. An edge- triggered 4- bit output register allows new input data to be written while previous data is held. 3- state outputs are provided for maximum versatility. The 74F410 is fully patible with all TTL families. TYPICAL SUPPLY CURRENT ( TOTAL) 45m A while WE, CS, and CP are low, the contents of the selected memory location follow these changes provided setup and hold time criteria are met. Read operation - When CS is low, WE is high, and CP goes from low- to- high, the contents of the memory location selected by the address inputs (A0- A3) are edge- triggered into the output register. When WE is low, CS is low, CP goes from low- to- high, the data at the data inputs is edge- triggered into the output register. The OE input controls the output buffers. When OE is high the four outputs (Q0- Q3) are in a high impedance or off state; when OE is low, the outputs are determined by the state of the output register. TYPE 74F410 TYPICAL ACCESS TIME 19.5ns FUNCTIONAL DESCRIPTION Write operation - When the three control inputs, write enable (WE), chip select (CS), and clock (CP), are low the information on the data inputs (D0- D3) is written into the memory location selected by the address inputs (A0- A3). If the input data changes ORDERING INFORMATION ORDER CODE DESCRIPTION MERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 18- pin plastic DIP (300mil) N74F410N INPUT AND OUTPUT LOADING AND FAN OUT TABLE PINS D0 - D3 A0 - A3 CP CS OE WE Data inputs Address inputs Clock pulse input (active rising edge) Chip select input (active low) Output enable input (active low) Write enable input (active low) DESCRIPTION 74F (U.L.) HIGH/LOW 1.0/1.0 1.0/1.0 1.0/2.0 1.0/2.0 1.0/1.0 1.0/1.0 150/40 LOAD VALUE HIGH/LOW 20µA/0.6m A 20µA/0.6m A...