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74F821

Fairchild
Part Number 74F821
Manufacturer Fairchild
Description 10-Bit D-Type Flip-Flop
Published May 28, 2005
Detailed Description 74F821 10-Bit D-Type Flip-Flop April 1988 Revised August 1999 74F821 10-Bit D-Type Flip-Flop General Description The 7...
Datasheet PDF File 74F821 PDF File

74F821
74F821

Overview
74F821 10-Bit D-Type Flip-Flop April 1988 Revised August 1999 74F821 10-Bit D-Type Flip-Flop General Description The 74F821 is a 10-bit D-type flip-flop with 3-STATE true outputs arranged in a broadside pinout.
Features s 3-STATE Outputs Ordering Code: Order Number 74F821SC 74F821SPC Package Number M24B N24C Package Description 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.
300 Wide 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.
300 Wide Devices also available in Tape and Reel.
Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols Connection Diagram IEEE/IEC © 1999 Fairchild Semiconductor Corporation DS009595 www.
fairchildsemi.
com 74F821 Unit Loading/Fan Out Pin Names D0–D9 OE CP O0–O9 Description Data Inputs Output Enable 3-STATE Input Clock Input 3-STATE Outputs 1.
0/1.
0 150/40 (33.
3) 20 µA/−0.
6 mA −3.
0 mA/24 mA (20 mA) U.
L.
HIGH/LOW 1.
0/1.
0 1.
0/1.
0 Input IIH/IIL Output IOH/IOL 20 µA/−0.
6 mA 20 µA/−0.
6 mA Functional Description The 74F821 consists of ten D-type edge-triggered flipflops.
This device has 3-STATE true outputs for bus systems organized in a broadside pinning.
The buffered Clock (CP) and buffered Output Enable (OE) are common to all flip-flops.
The flip-flops will store the state of their individual D inputs that meet the setup and hold times requirements on the LOW-to-HIGH CP transition.
With the OE LOW the content of the flip-flops are available at the outputs.
When the OE is HIGH, the outputs go to the high impedance state.
Operation of the OE input does not affect the state of the flip-flops.
Function Table Inputs OE H H H H L L L L CP H D X X L H L H X X Internal Output Function Q NC NC H L H L NC NC O Z Z Z Z L H NC NC Hold Hold Load Load Data Available Data Available No Change in Data No Change in Data     L H L  Logic Diagram L = LOW Voltage Level H = HIGH Voltage Level X = Immaterial Z = High Impedance = LOW-to-HIGH Transition NC = No Change Please note that this d...


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