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74F821

Part Number	74F821
Manufacturer	Philips
Description	Bus interface registers
Published	May 28, 2005
Detailed Description	INTEGRATED CIRCUITS 74F821/822/823/824/825/826 Bus interface registers Product specification IC15 Data Handbook 1996 Ja...
Datasheet	74F821 PDF File

Overview

INTEGRATED CIRCUITS 74F821/822/823/824/825/826 Bus interface registers Product specification IC15 Data Handbook 1996 Jan 05 Philips Semiconductors Philips Semiconductors Product specification Bus interface registers 74F821/822/823/824/825/826 74F821 74F822 74F823 74F824 74F825 74F826 10-bit bus interface register, non-inverting (3-State) 10-bit bus interface register, inverting (3-State) 9-bit bus interface register, non-inverting (3-State) 9-bit bus interface register, inverting (3-State) 8-bit bus interface register, non-inverting (3-State) 8-bit bus interface register, inverting (3-State) DESCRIPTION The 74F821 series bus interface registers are designed to eliminate the extra packages required to buffer existing registers and provide extra data width for wider data/address paths of busses carrying parity.
The 74F821/74F822 are buffered 10-bit wide versions of the popular 74F374/74F534 functions.
The 74F822 is the inverted output version of 74F821.
The 74F823 and 74F824 are 9-bit wide buffered registers with clock enable (CE) and master reset (MR) which are ideal for parity bus interfacing in high microprogrammed systems.
The 74F824 is the inverted version of 74F823.
The 74F825 and 74F826 are 8-bit buffered registers with all the 74F823/74F824 controls plus output enable (OE0, OE1, OE2) to allow multiuser control of the interface, e.
g.
, CS, DMA, and RD/WR.
They are ideal for uses as an output port requiring high IOL/IOH.
The 74F826 is the inverted version of 74F825.
TYPICAL fmax 180MHz 180MHz 180MHz TYPICAL SUPPLY CURRENT (TOTAL) 75mA 70mA 65mA FEATURES flip-flops • High speed parallel registers with positive edge-triggered D-type • High performance bus interface buffering for wide data/address paths or busses carrying parity • High impedance PNP base inputs for reduced loading (20µA in high and low states) • IIL is 20µA vs 1000µA for AM29821 series • Buffered control inputs to reduce AC effects • Ideal where high speed, light loading, or increased fa...

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