The M54/74HCT164 is a high speed CMOS 8 BIT
SIPO SHIFT REGISTER fabricated in silicon gate
C2MOStechnology.It hasthesamehighspeedperformance of LSTTL combined with trueCMOS low
powerconsumption.
The HCT164is an 8bitshift register with serial data
entry and an outputfrom each of the eight stages.
Data isentered seriallythrough one of two inputs (A
or B),either of theseinputscanbeused asanactive
high enable for data entry through the other input.
An unusedinput must be high, or bothinputs connected together. Each low-to-high transition on the
clock input shifts data one place to the right and
entersintoQA,thelogicNANDofthetwodatainputs
(A • B), the datathat existed before the rising clock
edge. A low level on the clear input overrides all
otherinputsand clearstheregister asynchronously,
forcingall Q outputs low.
All inputs are equipped with protection circuits
against static discharge and transient excess voltage.
This integrated circuit has input and output characteristicsthat arefully compatible with 54/74 LSTTL
logic families. M54/74HCT devices are designed to
directly interface HSC2MOSsystems with TTL and
NMOS components. They are also plugin replacements for LSTTL devices giving a reduction of
powerconsumption.
PIN CONNECTIONS(top view)
NC =
No Internal
Connection
February 1993
1/12
Page 2
M54/M74HCT164
INPUT AND OUTPUT EQUIVALENT CIRCUIT
TRUTH TABLE
INPUTSOUTPUS
CLEARCLOCK
LXXXLL
HXXNO CHANGE
HLXLQAn
HXLLQAn
HHHHQAn
X:Don’t Care
QAn- QGn : The levelof QA -QG,respectively. before themost-recent transitionof th clock.
Supply Voltage-0.5 to +7V
DC Input Voltage-0.5 to VCC+ 0.5V
I
DC Output Voltage-0.5 to VCC+ 0.5V
DC Input Diode Current± 20mA
DC Output Diode Current± 20mA
DC Output Source Sink Current Per Output Pin± 25mA
DC VCCor Ground Current± 50mA
GND
Power Dissipation500 (*)mW
Storage Temperature-65 to +150
Lead Temperature (10 sec)300
o
C
o
C
RECO MM ENDED O PERAT IN G C O NDITI O NS
SymbolParameterValueUnit
V
V
T
t
V
r,tf
Supply Voltage4.5 to 5.5V
CC
Input Voltage0 to V
I
Output Voltage0 to V
O
Operating Temperature: M54HC Series
op
M74HC Series
CC
CC
-55 to +125
-40 to +85
Input Rise and Fall Time (VCC= 4.5 to 5.5V)0 to 500ns
V
V
o
C
o
C
3/12
Page 4
M54/M74HCT164
DC SPECIFICATIO NS
SymbolParameter
V
V
V
V
I
∆I
High Level Input
IH
Voltage
Low Level Input
IL
Voltage
High Level
OH
Output Voltage
Low Level Output
OL
Voltage
Input Leakage
I
I
Current
Quiescent Supply
CC
Current
Additional worst
CC
case supply
current
Test ConditionsValue
V
(V)
4.5
CC
=25oC
A
54HC and 74HC
Min.Typ.Max.Min.Max.Min.Max.
2.02.02.0V
-40 to 85oC
74HC
-55 to 125oC
54HC
Unit
T
to
5.5
4.5
0.80.80.8V
to
5.5
VI=
IO=-20 µA4.44.54.44.4
V
IH
4.5
or
I
=-4.0 mA 4.184.314.134.10
O
V
IL
VI=
IO=20µA0.00.10.10.1
V
IH
4.5
or
I
= 4.0 mA0.170.260.330.4
O
V
IL
VI=VCCor GND±0.1±1±1µA
5.5
5.5 VI=VCCor GND44080µA
5.5Per Input pin
2.02.93.0mA
VI= 0.5V or
V
= 2.4V
I
Other Inputs at
VCCor GND
IO=0
V
V
4/12
Page 5
M54/M74HCT164
AC ELECTRICAL CHARACTERISTICS (CL=50pF,Inputtr=tf=6ns)
Test ConditionsValue
T
=25oC
SymbolParameter
t
t
t
t
TLH
THL
PLH
PHL
Output Transition
Time
Propagation
Delay Time
V
CC
(V)
4.58151922
4.523364554
A
54HC and 74HC
Min.Typ.Max.Min.Max.Min.Max.
(CLOCK - Q)
t
PHL
Propagation
4.524374656
Delay Time
(CLEAR - Q)
f
MAX
Maximum Clock
4.530502420
Frequency
t
W(H)
t
W(L)
Minimum Pulse
Width
4.58151922
(CLOCK)
t
W(L)
Minimum Pulse
4.58151922
Width
(CLEAR)
t
Minimum Set-up
s
4.54101315
Time
(A, B - CK)
t
h
Minimum Hold
4.5000
Time
(A, B - CK)
t
REM
Minimum
Removal Time
C
C
PD
Input Capacitance5101010pF
IN
(*)Power Dissipation
137
Capacitance
(*) CPDisdefined as the valueof the IC’s internal equivalent capacitance which is calculated fromthe operatingcurrent consumption without load.
(Referto Test Circuit).Average operting current can be obtained bythefollowingequation. ICC(opr) = CPD•VCC•fIN+I
-40 to 85oC
74HC
-55 to 125oC
54HC
Unit
ns
ns
ns
MHz
ns
ns
ns
ns
568
ns
pF
CC
5/12
Page 6
M54/M74HCT164
TIMING CHART
6/12
Page 7
SWITCHING CHARACTERISTICS TEST WAVEFORM
CLEARMODESERIALMODE
M54/M74HCT164
TEST CIRCUIT ICC(Opr.)
INPUTWAVEFORM IS THE SAME AS THATIN CASE OF SWITCHING CHARACTERISTICSTEST.
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third partieswhich may results from its use. No
license is granted byimplication or otherwise under any patent or patentrights of SGS-THOMSON Microelectronics. Specificationsmentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
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