Philips 74hc hct164 DATASHEETS
INTEGRATED CIRCUITS
DATA SH EET
For a complete data sheet, please also download:
•The IC06 74HC/HCT/HCU/HCMOS Logic Family Specifications
•The IC06 74HC/HCT/HCU/HCMOS Logic Package Information
•The IC06 74HC/HCT/HCU/HCMOS Logic Package Outlines
74HC/HCT164
8-bit serial-in/parallel-out shift
register
Product specification
File under Integrated Circuits, IC06
December 1990
Philips Semiconductors Product specification
8-bit serial-in/parallel-out shift register 74HC/HCT164
FEATURES
• Gated serial data inputs
• Asynchronous master reset
• Output capability: standard
• ICC category: MSI
Data is entered serially through one of two inputs (D
Dsb); either input can be used as an active HIGH enable for
data entry through the other input.
Both inputs must be connected together or an unused
input must be tied HIGH.
Data shifts one place to the right on each LOW-to-HIGH
transition of the clock (CP) input and enters into Q0, which
GENERAL DESCRIPTION
The 74HC/HCT164 are high-speed Si-gate CMOS devices
and are pin compatible with low power Schottky TTL
(LSTTL). They are specified in compliance with JEDEC
standard no. 7A.
is the logical AND of the two data inputs (Dsa,Dsb) that
existed one set-up time prior to the rising clock edge.
A LOW level on the master reset (MR) input overrides all
other inputs and clears the register asynchronously,
forcing all outputs LOW.
The 74HC/HCT164 are 8-bit edge-triggered shift registers
with serial data entry and an output from each of the eight
stages.
QUICK REFERENCE DATA
GND = 0 V; T
= 25 °C; tr= tf= 6 ns
amb
SYMBOL PARAMETER CONDITIONS
t
PHL
f
max
C
C
I
PD
/ t
PLH
propagation delay
CP to Q
MR to Q
n
n
CL= 15 pF; VCC= 5 V
maximum clock frequency 78 61 MHz
input capacitance 3.5 3.5 pF
power dissipation capacitance per
notes 1 and 2
package
TYPICAL
HC HCT
12
11
14
16
ns
ns
40 40 pF
sa
UNIT
or
Notes
1. C
is used to determine the dynamic power dissipation (PDin µW):
PD
PD= CPD× V
2
× fi+∑(CL× V
CC
2
× fo) where:
CC
fi= input frequency in MHz
fo= output frequency in MHz
∑ (CL× V
2
× fo) = sum of outputs
CC
CL= output load capacitance in pF
VCC= supply voltage in V
2. For HC the condition is VI= GND to V
CC
For HCT the condition is VI= GND to VCC− 1.5 V
ORDERING INFORMATION
See
“74HC/HCT/HCU/HCMOS Logic Package Information”
December 1990 2
.
Philips Semiconductors Product specification
8-bit serial-in/parallel-out shift register 74HC/HCT164
PIN DESCRIPTION
PIN NO. SYMBOL NAME AND FUNCTION
1, 2 D
3, 4, 5, 6, 10, 11, 12, 13 Q
sa,Dsb
to Q
0
7
7 GND ground (0 V)
8 CP clock input (LOW-to-HIGH, edge-triggered)
9
14 V
MR master reset input (active LOW)
CC
data inputs
outputs
positive supply voltage
Fig.1 Pin configuration. Fig.2 Logic symbol.
December 1990 3
Fig.3 IEC logic symbol.
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