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CD74FCT821A

Features: BiCMOS Technology With Low Quiescent PowerBuffered InputsNoninverted OutputsInput/Output Isolation From VCCControlled Output Edge Rates48-mA Output Sink CurrentOutput Voltage Swing Limited to 3.7 VSCR Latch-Up-Resistant BiCMOS Process and Circuit DesignProvide Extra Data Width Necessary...

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SeekIC No. : 004311946 Detail

CD74FCT821A: Features: BiCMOS Technology With Low Quiescent PowerBuffered InputsNoninverted OutputsInput/Output Isolation From VCCControlled Output Edge Rates48-mA Output Sink CurrentOutput Voltage Swing Limite...

CD74FCT821A Data Sheet

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Part Number:
CD74FCT821A
Supply Ability:
5000

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  • 1~5000
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  • 15 Days
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Product Details

Description



Features:

BiCMOS Technology With Low Quiescent Power
 Buffered Inputs
 Noninverted Outputs
 Input/Output Isolation From VCC
 Controlled Output Edge Rates
 48-mA Output Sink Current
 Output Voltage Swing Limited to 3.7 V
 SCR Latch-Up-Resistant BiCMOS Process and Circuit Design
 Provide Extra Data Width Necessary for Wider Address/Data Paths or Buses With Parity
 Outputs Have Undershoot-Protection Circuitry
 Buffered Control Inputs Reduce dc Loading Effects
 Package Options Include Plastic Small-Outline (M) Package and Standard Plastic (EN) DIP


Pinout

Connection Diagram


Specifications

DC supply voltage range, VCC  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 V to 6 V
DC input clamp current, IIK (VI < 0.5 V)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 mA
DC output clamp current, IOK (VO < 0.5 V)  . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .50 mA
DC output sink current per output pin, IOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .70 mA
DC output source current per output pin, IOH  . . . . . . . . . . . . . .. . . . . . . . . . . . . .. . .30 mA
Continuous current through VCC, (ICC)  . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . .  260 mA
Continuous current through GND  . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . .. .500 mA
Package thermal impedance, JA (see Note 1)  EN package  . .. . . . . . . . . . . . . . . . . .67°C/W
                                                                          M package . . . . . . . . . . . . . . . . . . . . 46°C/W
Storage temperature range, Tstg  . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .. . . 65°C to 150°C 


Description

The CD74FCT821A is a 10-bit flip-flop that features 3-state outputs designed specifically for driving highly capacitive or relatively low-impedance loads. It is particularly suitable for implementing wider buffer registers, I/O ports, bidirectional bus drivers with parity, and working registers.

CD74FCT821A uses a small-geometry BiCMOS technology. The CD74FCT821A output stage is a combination of bipolar and CMOS transistors that limits the output high level to two diode drops below VCC. This resultant lowering of output swing (0 V to 3.7 V) reduces power-bus ringing [a source of electromagnetic interference (EMI)] and minimizes VCC bounce and ground bounce and their effects during simultaneous output switching. The output configuration also enhances switching speed and is capable of sinking 48 mA.

The CD74FCT821A flip-flops enter data into their registers on the low-to-high transition of the clock (CLK). The Q outputs are noninverted data. The output-enable (OE) input controls the 3-state outputs and is independent of register operation. When OE is high, the outputs are in the high-impedance state.

The CD74FCT821A is characterized for operation from 0°C to 70°C.




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