• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: N
= 30%, NIH = 30% of V
IL
at VCC = 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V
= 0.8V (Max), VIH = 2V (Min)
IL
- CMOS Input Compatibility, I
≤ 1µA at VOL, V
l
CC
= 5V,
o
CD74HC564, CD74HCT564
Three-State Inverting Positive-Edge Triggered
Description
The Harris CD74HC534, CD74HCT534, CD74HC564 and
CD74HCT564 are high speed Octal D-Type Flip-Flops manufactured with silicon gate CMOS technology. The y possess
the low power consumption of standard CMOS integrated circuits, as well as the ability to drive 15 LSTTL loads. Due to the
large output drive capability and the three-state feature, these
devices are ideally suited for interfacing with bus lines in a bus
organized system. The two types are functionally identical and
differ only in their pinout arrangements.
TheCD74HC534,CD74HCT534,CD74HC564and
CD74HCT564 are positive edge triggered flip-flops. Data at
the D inputs, meeting the setup and hold time requirements,
C to 125oC
OH
are inverted and transferred to the Q outputs on the positive
going transition of the CLOCK input. When a high logic level is
applied to the OUTPUT ENABLE input, all outputs go to a
high impedance state, regardless of what signals are present
at the other inputs and the state of the storage elements.
The CD74HCT logic family is speed, function, and pin
compatible with the standard 74LS logic family.
Ordering Information
CC
PART NUMBER TEMP. RANGE (oC) PACKAGE
CD74HC534E-55 to 12520 Ld PDIPE20.3
CD74HCT534E-55 to 12520 Ld PDIPE20.3
CD74HC564E-55 to 12520 Ld PDIPE20.3
CD74HCT564E-55 to 12520 Ld PDIPE20.3
CD74HC564M-55 to 12520 Ld SOICM20.3
CD74HCT564M-55 to 12520 Ld SOICM20.3
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 sales office or
Harris customer service for ordering information.
PKG.
NO.
Pinouts
CD74HC534, CD74HCT534 (PDIP)
OE
Q0
D0
D1
Q1
Q2
D2
D3
Q3
GND
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
3. θJA is measured with the component mounted on an evaluation PC board in free air.
NOTE: Outputs should be switching from 10% VCC to 90% VCC in
accordance with device truth table.For f
, input duty cycle = 50%.
MAX
FIGURE 1. HC CLOCK PULSE RISE AND FALL TIMES AND
PULSE WIDTH
tr = 6nstf = 6ns
V
t
CC
GND
TLH
INPUT
t
THL
90%
50%
10%
90%
t
50%
10%
PLH
INVERTING
OUTPUT
t
PHL
FIGURE 3. HCTRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
tfC
L
V
CC
50%
GND
t
H(L)
V
CC
50%
t
SU(L)
GND
CLOCK
INPUT
DAT A
INPUT
t
SU(H)
trC
L
90%
10%
t
H(H)
NOTE: Outputs should be switching from 10% VCC to 90% VCC in
accordance with device truth table.For f
, input duty cycle = 50%.
MAX
FIGURE 2. HCT CLOCK PULSE RISE AND FALL TIMES AND
PULSE WIDTH
= 6ns
tr = 6ns
INPUT
t
THL
2.7V
1.3V
0.3V
t
f
3V
GND
t
TLH
90%
t
PLH
1.3V
10%
INVERTING
OUTPUT
t
PHL
FIGURE 4. HCTTRANSITION TIMES AND PROPAGATION
DELAY TIMES, COMBINATION LOGIC
CLOCK
INPUT
DAT A
INPUT
t
SU(H)
trC
L
2.7V
0.3V
t
H(H)
1.3V
1.3V
tfC
L
3V
1.3V
GND
t
H(L)
3V
1.3V
t
SU(L)
GND
OUTPUT
t
REM
V
CC
SET, RESET
OR PRESET
50%
90%
t
PLH
IC
t
TLH
t
THL
90%
50%
10%
t
PHL
GND
C
L
50pF
FIGURE 5. HC SETUP TIMES, HOLD TIMES, REMOVAL TIME,
AND PROPAGATION DELAY TIMES FOR EDGE
TRIGGERED SEQUENTIAL LOGIC CIRCUITS
OUTPUT
t
REM
3V
SET, RESET
1.3V
90%
1.3V
t
t
PLH
TLH
90%
1.3V
10%
t
PHL
t
THL
OR PRESET
IC
C
L
50pF
FIGURE 6. HCT SETUP TIMES, HOLD TIMES, REMOVAL TIME,
AND PROPAGATION DELAY TIMES FOR EDGE
TRIGGERED SEQUENTIAL LOGIC CIRCUITS
7
GND
CD74HC534, CD74HCT534, CD74HC564, CD74HCT564
Test Circuits and Waveforms
6ns6ns
OUTPUT
DISABLE
OUTPUT LOW
TO OFF
OUTPUT HIGH
TO OFF
50%
t
t
OUTPUTS
ENABLED
PLZ
PHZ
90%
10%
90%
OUTPUTS
DISABLED
(Continued)
10%
t
PZL
t
PZH
FIGURE 7. HCTHREE-STATE PROPAGATION DELAY
WAVEFORM
OTHER
INPUTS
TIED HIGH
OR LOW
OUTPUT
DISABLE
50%
50%
OUTPUTS
ENABLED
IC WITH
THREE-
STATE
OUTPUT
V
CC
GND
OUTPUT
R
0.3
t
t
6ns
PZL
PZH
t
r
OUTPUT
DISABLE
OUTPUT LOW
TO OFF
OUTPUT HIGH
TO OFF
t
t
OUTPUTS
ENABLED
6nst
PLZ
PHZ
10%
90%
f
2.7
1.3
OUTPUTS
DISABLED
FIGURE 8. HCT THREE-STATE PROPAGATION DELAY
WAVEFORM
= 1kΩ
L
C
L
50pF
VCC FOR t
GND FOR t
PLZ
PHZ
AND t
AND t
PZL
PZH
3V
GND
1.3V
1.3V
OUTPUTS
ENABLED
NOTE: Opendrain waveformst
VCC, CL = 50pF.
FIGURE 9. HC AND HCT THREE-STATE PROPAGATION DELAY TEST CIRCUIT
PLZ
and t
are the same as those for three-state shown on the left. The test circuit is Output RL=1kΩto
PZL
8
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accordance with TI’s standard warranty. Testing and other quality control techniques are utilized to the extent
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performed, except those mandated by government requirements.
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Copyright 1999, Texas Instruments Incorporated
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