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Fairchild Semiconductor - Octal D-Type Flip-Flop with 3-STATE Outputs

Numéro de référence 74VHCT574A
Description Octal D-Type Flip-Flop with 3-STATE Outputs
Fabricant Fairchild Semiconductor 
Logo Fairchild Semiconductor 





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74VHCT574A fiche technique
July 1997
Revised April 1999
74VHCT574A
Octal D-Type Flip-Flop with 3-STATE Outputs
General Description
The VHCT574A is an advanced high speed CMOS octal
flip-flop with 3-STATE output fabricated with silicon gate
CMOS technology. It achieves the high speed operation
similar to equivalent Bipolar Schottky TTL while maintain-
ing the CMOS low power dissipation. This 8-bit D-type flip-
flop is controlled by a clock input (CP) and an Output
Enable input (OE). When the OE input is HIGH, the eight
outputs are in a high impedance state.
Protection circuits ensure that 0V to 7V can be applied to
the input and output (Note 1) pins without regard to the
supply voltage. This device can be used to interface 3V to
5V systems and two supply systems such as battery back
up. This circuit prevents device destruction due to mis-
matched supply and input voltages.
Note 1: Outputs in OFF-State.
Features
s High speed: fMAX = 140 MHz (typ) at TA = 25°C
s Power Down Protection is provided on all inputs and
outputs.
s Low Noise: VOLP = 1.6V (max)
s Low Power Dissipation:
ICC = 4 µA (max) @ TA = 25°C
s Pin and Function Compatible with 74HCT574
Ordering Code:
Order Number Package Number
Package Description
74VHCT574AM
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74VHCT574ASJ
M20D
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74VHCT574AMTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
74VHCT574AN
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
IEEE/IEC
Pin Descriptions
Pin Names
D0–D7
CP
OE
O0–O7
Description
Data Inputs
Clock Pulse Input 3-STATE
Output Enable Input 3-STATE
Outputs
© 1999 Fairchild Semiconductor Corporation DS500029.prf
www.fairchildsemi.com

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