1
Data sheet acquired from Harris Semiconductor
SCHS183A
Features
• Buffered Inputs
• Common Three-State Output Enable Control
• Three-State Outputs
• Bus Line Driving Capability
• Typical Propagation Delay (Cloc k to Q) = 15ns at
VCC = 5V, CL = 15pF, TA = 25oC
• Fanout (Over Temperature Range)
- Standard Outputs. . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating T emperature Range . . . -55oC to 125oC
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30% of VCC
at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il≤1µA at VOL, VOH
Description
The ’HC374, ’HCT374, ’HC574, and ’HCT574 are Octal D-Type
Flip-Flops with Three-State Outputs and the capability to drive
15 LSTTL loads. The eight edge-triggered flip-flops enter data
into their registers on the LOW to HIGH transition of clock (CP).
The Output Enable (OE) controls the three-state outputs and is
independent of the register operation. When Output Enable
(OE) is HIGH the outputs will be in the high impedance state.
The 374 and 574 are identical in function and differ only in their
pinout arrangements.
Ordering Information
PART NUMBER TEMP. RANGE
(oC) PACKAGE
CD54HC374F3A -55 to 125 20 Ld CERDIP
CD74HC374E -55 to 125 20 Ld PDIP
CD74HC374M -55 to 125 20 Ld SOIC
CD54HCT374F3A -55 to 125 20 Ld CERDIP
CD74HCT374E -55 to 125 20 Ld PDIP
CD74HCT374M -55 to 125 20 Ld SOIC
CD54HC574F -55 to 125 20 Ld CERDIP
CD54HC574F3A -55 to 125 20 Ld CERDIP
CD74HC574E -55 to 125 20 Ld PDIP
CD74HC574M -55 to 125 20 Ld SOIC
CD54HCT574F -55 to 125 20 Ld CERDIP
CD54HCT574F3A -55 to 125 20 Ld CERDIP
CD74HCT574E -55 to 125 20 Ld PDIP
CD74HCT574M -55 to 125 20 Ld SOIC
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Wafer and die for this part number is available which meets all
electrical specifications. Please contact your local TI sales office
or customer service for ordering information.
F ebruary 1998 - Revised Ma y 2000
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © 2000, Texas Instruments Incorporated
CD54/74HC374, CD54/74HCT374,
CD54/74HC574, CD54/74HCT574
High Speed CMOS Logic Octal D-Type Flip-Flop,
Three-State Positive-Edge Triggered
[ /Title
(CD74
HC374
,
CD74
HCT37
4,
CD74
HC574
,
CD74
HCT57