5-1
FACT DATA
 
 
The MC74AC161/74ACT161 and MC74AC163/74ACT163 are high-speed
synchronous modulo-16 binary counters. They are synchronously presettable for
application in programmable dividers and have two types of Count Enable inputs
plus a Terminal Count output for versatility in forming synchronous multistage
counters. The MC74AC161/74ACT161 has an asynchronous Master Reset input
that overrides all other inputs and forces the outputs LOW. The MC74AC163/
74ACT163 has a Synchronous Reset input that overrides counting and parallel
loading and allows the outputs to be simultaneously reset on the rising edge of
the clock.
•Synchronous Counting and Loading
•High-Speed Synchronous Expansion
•Typical Count Rate of 125 MHz
•Outputs Source/Sink 24 mA
• ′ACT161 and ′ACT163 Have TTL Compatible Inputs
1516 14 13 12 11 10
21 3 4 5 6 7
VCC 9
8
TC Q0Q1Q2Q3CET PE
*R CP P0P1P2P3CEP GND
PIN NAMES
CEP Count Enable Parallel Input
CET Count Enable Trickle Input
CP Clock Pulse Input
MR (′161) Asynchronous Master Reset Input
SR (′163) Synchronous Reset Input
P0–P3Parallel Data Inputs
PE Parallel Enable Input
Q0–Q3Flip-Flop Outputs
TC Terminal Count Output




SYNCHRONOUS
PRESETTABLE
BINARY COUNTER
N SUFFIX
CASE 648-08
PLASTIC
D SUFFIX
CASE 751B-05
PLASTIC
LOGIC SYMBOL
*MR for
′
161
*SR for
′
163
PE P0P1P2
CEP P3
CET
CP
*R Q0Q1Q2Q3
TC
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-2
FACT DATA
FUNCTIONAL DESCRIPTION
The MC74AC161/74ACT161 and MC74AC163/74ACT163
count modulo-16 binary sequence. From state 15 (HHHH)
they increment to state 0 (LLLL). The clock inputs of all
flip-flops are driven in parallel through a clock buffer. Thus all
changes of the Q outputs (except due to Master Reset of the
′161) occur as a result of, and synchronous with, the
LOW-to-HIGH transition of the CP input signal. The circuits
have four fundamental modes of operation, in order of
precedence: asynchronous reset (′161), synchronous reset
(′163), parallel load, count-up and hold. Five control inputs —
Master Reset (MR, ′161), Synchronous Reset (SR, ′163),
Parallel Enable (PE), Count Enable Parallel (CEP) and Count
Enable Trickle (CET) determine the mode of operation, as
shown in the Mode Select Table. A LOW signal on MR
overrides all other inputs and asynchronously forces all
outputs LOW. A LOW signal on SR overrides counting and
parallel loading and allows all outputs to go LOW on the next
rising edge of CP. A LOW signal on PE overrides counting and
allows information on the Parallel Data (Pn) inputs to be loaded
into the flip-flops on the next rising edge of CP . With PE and MR
(′161) or SR (′163) HIGH, CEP and CET permit counting when
both are HIGH. Conversely, a LOW signal on either CEP or
CET inhibits counting.
The MC74AC161/74ACT161 and MC74AC163/74ACT163
use D-type edge-triggered flip-flops and changing the SR, PE,
CEP and CET inputs when the CP is in either state does not
cause errors, provided that the recommended setup and hold
times, with respect to the rising edge of CP, are observed.
The T erminal Count (TC) output is HIGH when CET is HIGH
and counter is in state 15. To implement synchronous
multistage counters, the TC outputs can be used with the CEP
and CET inputs in two different ways. Please refer to the
MC74AC568 data sheet. The TC output is subject to decoding
spikes due to internal race conditions and is therefore not
recommended for use as a clock or asynchronous reset for
flip-flops, counters or registers.
Logic Equations:Count Enable = CEP•CET•PE
TC = Q0•Q1•Q2•Q3•CET
MODE SELECT TABLE
*SR PE CET CEP Action on the Rising
Clock Edge ( )
L X X X Reset (Clear)
H L X X Load (Pn → Qn)
H H H H Count (Increment)
H H L X No Change (Hold)
H H X L No Change (Hold)
*For ′163 only
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
STATE DIAGRAM
15
0
14
13
12
5
4
6
7
8
123
11 10 9
CD
PE
P0P1P2
CEP
P3
CET
CP
Q0Q1Q2Q3
TC
MR
′
161
SR
′
163
′
163
ONLY
′163
CP
Q0Q0
CP
DETAIL A
DETAIL A DETAIL A DETAIL A
D CP D
Q Q
LOGIC DIAGRAM
Please note that this diagram is provided only for the understanding of logic
operations and should not be used to estimate propagation delays.
′
161
ONLY
′161
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-3
FACT DATA
MAXIMUM RATINGS*
Symbol Parameter Value Unit
VCC DC Supply Voltage (Referenced to GND) –0.5 to +7.0 V
Vin DC Input Voltage (Referenced to GND) –0.5 to VCC +0.5 V
Vout DC Output Voltage (Referenced to GND) –0.5 to VCC +0.5 V
Iin DC Input Current, per Pin ±20 mA
Iout DC Output Sink/Source Current, per Pin ±50 mA
ICC DC VCC or GND Current per Output Pin ±50 mA
Tstg Storage Temperature –65 to +150 °C
* Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recommended
Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol Parameter Min Typ Max Unit
VCC
Supply Voltage
′AC 2.0 5.0 6.0
V
VCC
Supply Voltage
′ACT 4.5 5.0 5.5
V
Vin, Vout DC Input Voltage, Output Voltage (Ref. to GND) 0 VCC V
tr, tf
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
VCC @ 3.0 V 150
tr, tf
Input Rise and Fall Time (Note 1)
′AC Devices except Schmitt Inputs
VCC @ 4.5 V 40 ns/V
r, tf
′AC Devices except Schmitt Inputs
VCC @ 5.5 V 25
tr, tf
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
VCC @ 4.5 V 10
ns/V
tr, tf
Input Rise and Fall Time (Note 2)
′ACT Devices except Schmitt Inputs
VCC @ 5.5 V 8.0
ns/V
TJJunction Temperature (PDIP) 140 °C
TAOperating Ambient Temperature Range –40 25 85 °C
IOH Output Current — High –24 mA
IOL Output Current — Low 24 mA
1. Vin from 30% to 70% VCC; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. Vin from 0.8 V to 2.0 V ; see individual Data Sheets for devices that dif fer from the typical input rise and fall times.
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-4
FACT DATA
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74AC 74AC
Unit
Conditions
Symbol
Parameter
VCC
(V)
TA = +25°CTA =
–40°C to +85°C
Unit
Conditions
Typ Guaranteed Limits
VIH
Minimum High Level
Input Voltage
3.0 1.5 2.1 2.1 VOUT = 0.1 V
Input Voltage
4.5 2.25 3.15 3.15 V or VCC – 0.1 V
5.5 2.75 3.85 3.85
VIL
Maximum Low Level
Input Voltage
3.0 1.5 0.9 0.9 VOUT = 0.1 V
Input Voltage
4.5 2.25 1.35 1.35 V or VCC – 0.1 V
5.5 2.75 1.65 1.65
VOH
Minimum High Level
Output Voltage
3.0 2.99 2.9 2.9 IOUT = –50 µA
Output Voltage
4.5 4.49 4.4 4.4 V
5.5 5.49 5.4 5.4
V
*VIN = VIL or VIH
3.0 2.56 2.46
V
–12 mA
4.5 3.86 3.76
V
IOH –24 mA
5.5 4.86 4.76 –24 mA
VOL
Maximum Low Level
Output Voltage
3.0 0.002 0.1 0.1 IOUT = 50 µA
Output Voltage
4.5 0.001 0.1 0.1 V
5.5 0.001 0.1 0.1
V
*VIN = VIL or VIH
3.0 0.36 0.44
V
12 mA
4.5 0.36 0.44
V
IOL 24 mA
5.5 0.36 0.44 24 mA
IIN
Maximum Input
Leakage Current
5.5
±0.1
µA
VI = VCC, GND
Leakage Current
5.5
±0.1
µA
VI = VCC, GND
IOLD
†Minimum Dynamic
Output Current
5.5 75 mA VOLD = 1.65 V Max
IOHD
Output Current
5.5 –75 mA VOHD = 3.85 V Min
ICC
Maximum Quiescent
Supply Current
5.5
8.0
µA
VIN = VCC or GND
Supply Current
5.5
8.0
µA
VIN = VCC or GND
* All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
Note: IIN and ICC @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V VCC.
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-5
FACT DATA
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74AC161 74AC161
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Min Typ Max Min Max
fmax
Maximum Count 3.3 70 111 60
MHz
3-3
fmax
Frequency 5.0 110 167 95
MHz
3-3
tPLH
Propagation Delay 3.3 2.0 7.0 12.0 1.5 13.5
ns
3-6
tPLH
CP to Qn (PE Input HIGH or LOW) 5.0 1.5 5.0 9.0 1.0 9.5
ns
3-6
tPHL
Propagation Delay 3.3 1.5 7.0 12.0 1.5 13.0
ns
3-6
tPHL
CP to Qn (PE Input HIGH or LOW) 5.0 1.5 5.0 9.5 1.5 10.0
ns
3-6
tPLH
Propagation Delay 3.3 3.0 9.0 15.0 2.5 16.5
ns
3-6
tPLH
CP to TC 5.0 2.0 6.0 10.5 1.5 11.5
ns
3-6
tPHL
Propagation Delay 3.3 3.5 8.5 14.0 2.5 15.5
ns
3-6
tPHL
CP to TC 5.0 2.0 6.5 11.0 2.0 11.5
ns
3-6
tPLH
Propagation Delay 3.3 2.0 5.5 9.5 1.5 11.0
ns
3-6
tPLH
CET to TC 5.0 1.5 3.5 6.5 1.0 7.5
ns
3-6
tPHL
Propagation Delay 3.3 2.5 6.5 11.0 2.0 12.5
ns
3-6
tPHL
CET to TC 5.0 2.0 5.0 8.5 1.5 9.5
ns
3-6
tPHL
Propagation Delay 3.3 2.0 6.0 12.0 1.5 13.5
ns
3-6
tPHL
MR to Qn5.0 1.5 5.5 9.5 1.5 10.0
ns
3-6
tPHL
Propagation Delay 3.3 3.5 10.0 15.0 3.0 17.5
ns
3-6
tPHL
MR to TC 5.0 2.5 8.5 13.0 2.5 13.5
ns
3-6
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74AC163 74AC163
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Min Typ Max Min Max
fmax
Maximum Count 3.3 70 95 60
MHz
3-3
fmax
Frequency 5.0 110 140 95
MHz
3-3
tPLH
Propagation Delay 3.3 2.0 7.5 12.5 1.5 13.5
ns
3-6
tPLH
CP to Qn (PE Input HIGH or LOW) 5.0 1.5 5.5 9.0 1.0 9.5
ns
3-6
tPHL
Propagation Delay 3.3 1.5 8.5 12.0 1.5 13.0
ns
3-6
tPHL
CP to Qn (PE Input HIGH or LOW) 5.0 1.5 6.0 9.5 1.5 10.0
ns
3-6
tPLH
Propagation Delay 3.3 3.0 9.5 15.0 2.5 16.5
ns
3-6
tPLH
CP to TC 5.0 2.0 7.0 10.5 1.5 11.5
ns
3-6
tPHL
Propagation Delay 3.3 3.5 11.0 14.0 2.5 15.5
ns
3-6
tPHL
CP to TC 5.0 2.0 8.0 11.0 2.0 11.5
ns
3-6
tPLH
Propagation Delay 3.3 2.0 7.5 9.5 1.5 11.0
ns
3-6
tPLH
CET to TC 5.0 1.5 5.5 6.5 1.0 7.5
ns
3-6
tPHL
Propagation Delay 3.3 2.5 8.5 11.0 2.0 12.5
ns
3-6
tPHL
CET to TC 5.0 2.0 6.0 8.5 1.5 9.5
ns
3-6
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-6
FACT DATA
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
74AC161 74AC161
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ Guaranteed Minimum
ts
Setup Time, HIGH or LOW 3.3 6.0 13.5 16.0
ns
3-9
ts
Pn to CP 5.0 3.5 8.5 10.5
ns
3-9
th
Hold Time, HIGH or LOW 3.3 –7.0 –1.0 –0.5
ns
3-9
th
Pn to CP 5.0 –4.0 0 0
ns
3-9
ts
Setup Time, HIGH or LOW 3.3 6.5 11.5 14.0
ns
3-9
ts
PE to CP 5.0 4.0 7.5 8.5
ns
3-9
th
Hold Time, HIGH or LOW 3.3 –6.0 0 0
ns
3-9
th
PE to CP 5.0 –3.5 0.5 1.0
ns
3-9
ts
Setup Time, HIGH or LOW 3.3 3.0 6.0 7.0
ns
3-9
ts
CEP or CET to CP 5.0 2.0 4.5 5.0
ns
3-9
th
Hold Time, HIGH or LOW 3.3 –3.5 0 0
ns
3-9
th
CEP or CET to CP 5.0 –2.0 0 0.5
ns
3-9
tw
Clock Pulse Width (Load) 3.3 2.0 3.5 4.0
ns
3-6
tw
HIGH or LOW 5.0 2.0 2.5 3.0
ns
3-6
tw
Clock Pulse Width (Count) 3.3 2.0 4.0 4.5
ns
3-6
tw
HIGH or LOW 5.0 2.0 3.0 3.5
ns
3-6
tw
MR Pulse Width, LOW
3.3 3.0 5.5 7.5
ns
3-6
tw
MR Pulse Width, LOW
5.0 2.5 4.5 6.0
ns
3-6
trec
Recovery TIme 3.3 –2.0 –0.5 0
ns
3-9
trec
MR to CP 5.0 –1.0 0 0.5
ns
3-9
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-7
FACT DATA
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
74AC163 74AC163
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ Guaranteed Minimum
ts
Setup Time, HIGH or LOW 3.3 5.5 13.5 16.0
ns
3-9
ts
Pn to CP 5.0 4.0 8.5 10.5
ns
3-9
th
Hold Time, HIGH or LOW 3.3 –7.0 –1.0 –0.5
ns
3-9
th
Pn to CP 5.0 –5.0 0 0
ns
3-9
ts
Setup Time, HIGH or LOW 3.3 5.5 14 16.5
ns
3-9
ts
SR to CP 5.0 4.0 9.5 11.0
ns
3-9
th
Hold Time, HIGH or LOW 3.3 –7.5 –1.0 –0.5
ns
3-9
th
SR to CP 5.0 –5.5 –0.5 0
ns
3-9
ts
Setup Time, HIGH or LOW 3.3 5.5 11.5 14.0
ns
3-9
ts
PE to CP 5.0 4.0 7.5 8.5
ns
3-9
th
Hold Time, HIGH or LOW 3.3 –7.5 –1.0 –0.5
ns
3-9
th
PE to CP 5.0 –5.0 –0.5 0
ns
3-9
ts
Setup Time, HIGH or LOW 3.3 3.5 6.0 7.0
ns
3-9
ts
CEP or CET to CP 5.0 2.5 4.5 5.0
ns
3-9
th
Hold Time, HIGH or LOW 3.3 –4.5 0 0
ns
3-9
th
CEP or CET to CP 5.0 –3.0 0 0.5
ns
3-9
tw
Clock Pulse Width (Load) 3.3 3.0 3.5 4.0
ns
3-6
tw
HIGH or LOW 5.0 2.0 2.5 3.0
ns
3-6
tw
Clock Pulse Width (Count) 3.3 3.0 4.0 4.5
ns
3-6
tw
HIGH or LOW 5.0 2.0 3.0 3.5
ns
3-6
* Voltage Range 3.3 V is 3.3 V ±0.3 V.
Voltage Range 5.0 V is 5.0 V ±0.5 V.
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-8
FACT DATA
DC CHARACTERISTICS
Symbol
Parameter
VCC
(V)
74ACT 74ACT
Unit
Conditions
Symbol
Parameter
VCC
(V)
TA = +25°CTA =
–40°C to +85°C
Unit
Conditions
Typ Guaranteed Limits
VIH
Minimum High Level
Input Voltage
4.5 1.5 2.0 2.0
V
VOUT = 0.1 V
Input Voltage
5.5 1.5 2.0 2.0
V
or VCC – 0.1 V
VIL
Maximum Low Level
Input Voltage
4.5 1.5 0.8 0.8
V
VOUT = 0.1 V
Input Voltage
5.5 1.5 0.8 0.8
V
or VCC – 0.1 V
VOH
Minimum High Level
Output Voltage
4.5 4.49 4.4 4.4
V
IOUT = –50 µA
Output Voltage
5.5 5.49 5.4 5.4
V
*VIN = VIL or VIH
4.5 3.86 3.76 V
IOH
–24 mA
5.5 4.86 4.76
IOH
–24 mA
VOL
Maximum Low Level
Output Voltage
4.5 0.001 0.1 0.1
V
IOUT = 50 µA
Output Voltage
5.5 0.001 0.1 0.1
V
*VIN = VIL or VIH
4.5 0.36 0.44 V
IOL
24 mA
5.5 0.36 0.44
IOL
24 mA
IIN
Maximum Input
Leakage Current
5.5
±0.1
µA
VI = VCC, GND
Leakage Current
5.5
±0.1
µA
VI = VCC, GND
∆ICCT Additional Max. ICC/Input 5.5 0.6 1.5 mA VI = VCC – 2.1 V
IOLD
†Minimum Dynamic
Output Current
5.5 75 mA VOLD = 1.65 V Max
IOHD
Output Current
5.5 –75 mA VOHD = 3.85 V Min
ICC
Maximum Quiescent
Supply Current
5.5
8.0
µA
VIN = VCC or GND
Supply Current
5.5
8.0
µA
VIN = VCC or GND
* All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-9
FACT DATA
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74ACT161 74ACT161
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Min Typ Max Min Max
fmax
Maximum Count
Frequency
5.0
115
125
100
MHz
3-3
fmax
Frequency
5.0
115
125
100
MHz
3-3
tPLH
Propagation Delay
CP to Qn (PE Input HIGH or LOW)
5.0
1.5
8.0
9.5
1.5
10.5
ns
3-6
tPLH
CP to Qn (PE
Input HIGH or LOW)
5.0
1.5
8.0
9.5
1.5
10.5
ns
3-6
tPHL
Propagation Delay
CP or Qn (PE Input HIGH or LOW)
5.0
1.5
8.0
10.5
1.5
11.5
ns
3-6
tPHL
CP or Qn (PE
Input HIGH or LOW)
5.0
1.5
8.0
10.5
1.5
11.5
ns
3-6
tPLH
Propagation Delay
CP to TC
5.0
2.0
11.0
11.0
1.5
12.5
ns
3-6
tPLH
CP to TC
5.0
2.0
11.0
11.0
1.5
12.5
ns
3-6
tPHL
Propagation Delay
CP to TC
5.0
1.5
11.0
12.5
1.5
13.5
ns
3-6
tPHL
CP to TC
5.0
1.5
11.0
12.5
1.5
13.5
ns
3-6
tPLH
Propagation Delay
CET to TC
5.0
1.5
7.5
8.5
1.5
10.0
ns
3-6
tPLH
CET to TC
5.0
1.5
7.5
8.5
1.5
10.0
ns
3-6
tPHL
Propagation Delay
CET to TC
5.0
1.5
8.0
9.5
1.5
10.5
ns
3-6
tPHL
CET to TC
5.0
1.5
8.0
9.5
1.5
10.5
ns
3-6
tPHL
Propagation Delay
MR to Qn
5.0
1.5
8.0
10.0
1.5
11.0
ns
3-6
tPHL
MR
to Qn
5.0
1.5
8.0
10.0
1.5
11.0
ns
3-6
tPHL
Propagation Delay
MR to TC
5.0
2.5
10.0
13.5
2.0
14.5
ns
3-6
tPHL
MR
to TC
5.0
2.5
10.0
13.5
2.0
14.5
ns
3-6
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
AC CHARACTERISTICS (For Figures and Waveforms — See Section 3)
Symbol
Parameter
VCC*
(V)
74ACT163 74ACT163
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Min Typ Max Min Max
fmax
Maximum Count
Frequency
5.0
120
140
105
MHz
3-3
fmax
Frequency
5.0
120
140
105
MHz
3-3
tPLH
Propagation Delay
CP to Qn (PE Input HIGH or LOW)
5.0
1.5
5.5
10.0
1.5
11.0
ns
3-6
tPLH
CP to Qn (PE
Input HIGH or LOW)
5.0
1.5
5.5
10.0
1.5
11.0
ns
3-6
tPHL
Propagation Delay
CP to Qn (PE Input HIGH or LOW)
5.0
1.5
6.0
11.0
1.5
12.0
ns
3-6
tPHL
CP to Qn (PE
Input HIGH or LOW)
5.0
1.5
6.0
11.0
1.5
12.0
ns
3-6
tPLH
Propagation Delay
CP to TC
5.0
2.5
7.0
11.5
2.0
13.5
ns
3-6
tPLH
CP to TC
5.0
2.5
7.0
11.5
2.0
13.5
ns
3-6
tPHL
Propagation Delay
CP to TC
5.0
3.0
8.0
13.5
2.0
15.0
ns
3-6
tPHL
CP to TC
5.0
3.0
8.0
13.5
2.0
15.0
ns
3-6
tPLH
Propagation Delay
CET to TC
5.0
2.0
5.5
9.0
1.5
10.5
ns
3-6
tPLH
CET to TC
5.0
2.0
5.5
9.0
1.5
10.5
ns
3-6
tPHL
Propagation Delay
CET to TC
5.0
2.0
6.0
10.0
2.0
11.0
ns
3-6
tPHL
CET to TC
5.0
2.0
6.0
10.0
2.0
11.0
ns
3-6
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-10
FACT DATA
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
74ACT161 74ACT161
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ Guaranteed Minimum
ts
Setup Time, HIGH or LOW
Pn to CP
5.0
7.0
9.5
11.5
ns
3-9
ts
Pn to CP
5.0
7.0
9.5
11.5
ns
3-9
th
Hold Time, HIGH or LOW
Pn to CP
5.0
–3.0
0
0
ns
3-9
th
Pn to CP
5.0
–3.0
0
0
ns
3-9
ts
Setup Time, HIGH or LOW
PE to CP
5.0
6.0
8.5
9.5
ns
3-9
ts
PE
to CP
5.0
6.0
8.5
9.5
ns
3-9
th
Hold Time, HIGH or LOW
PE to CP
5.0
–3.5
– 0.5
– 0.5
ns
3-9
th
PE
to CP
5.0
–3.5
– 0.5
– 0.5
ns
3-9
ts
Setup Time, HIGH or LOW
CEP or CET to CP
5.0
4.0
5.5
6.5
ns
3-9
ts
CEP or CET to CP
5.0
4.0
5.5
6.5
ns
3-9
th
Hold Time, HIGH or LOW
CEP or CET to CP
5.0
–2.0
0
0
ns
3-9
th
CEP or CET to CP
5.0
–2.0
0
0
ns
3-9
tw
Clock Pulse Width (Load)
HIGH or LOW
5.0
2.0
3.0
3.5
ns
3-6
tw
HIGH or LOW
5.0
2.0
3.0
3.5
ns
3-6
tw
Clock Pulse Width (Count)
HIGH or LOW
5.0
2.0
3.0
3.5
ns
3-6
tw
HIGH or LOW
5.0
2.0
3.0
3.5
ns
3-6
tw
MR Pulse Width, LOW
5.0
3.0
3.0
7.5
ns
3-6
tw
MR Pulse Width, LOW
5.0
3.0
3.0
7.5
ns
3-6
trec
Recovery Time
MR to CP
5.0
0
0
0.5
ns
3-9
trec
MR
to CP
5.0
0
0
0.5
ns
3-9
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-11
FACT DATA
AC OPERATING REQUIREMENTS
Symbol
Parameter
VCC*
(V)
74ACT163 74ACT163
Unit
Fig.
No.
Symbol
Parameter
VCC*
(V)
TA = +25°C
CL = 50 pF
TA = –40°C
to +85°C
CL = 50 pF
Unit
Fig.
No.
Typ Guaranteed Minimum
ts
Setup Time, HIGH or LOW
Pn to CP
5.0
4.0
10.0
12.0
ns
3-9
ts
Pn to CP
5.0
4.0
10.0
12.0
ns
3-9
th
Hold Time, HIGH or LOW
Pn to CP
5.0
–5.0
0.5
0.5
ns
3-9
th
Pn to CP
5.0
–5.0
0.5
0.5
ns
3-9
ts
Setup Time, HIGH or LOW
SR to CP
5.0
4.0
10.0
11.5
ns
3-9
ts
SR
to CP
5.0
4.0
10.0
11.5
ns
3-9
th
Hold Time, HIGH or LOW
SR to CP
5.0
–5.5
–0.5
–0.5
ns
3-9
th
SR
to CP
5.0
–5.5
–0.5
–0.5
ns
3-9
ts
Setup Time, HIGH or LOW
PE to CP
5.0
4.0
8.5
10.5
ns
3-9
ts
PE
to CP
5.0
4.0
8.5
10.5
ns
3-9
th
Hold Time, HIGH or LOW
PE to CP
5.0
–5.5
–0.5
0
ns
3-9
th
PE
to CP
5.0
–5.5
–0.5
0
ns
3-9
ts
Setup Time, HIGH or LOW
CEP or CET to CP
5.0
2.5
5.5
6.5
ns
3-9
ts
CEP or CET to CP
5.0
2.5
5.5
6.5
ns
3-9
th
Hold Time, HIGH or LOW
CEP or CET to CP
5.0
–3.0
0
0.5
ns
3-9
th
CEP or CET to CP
5.0
–3.0
0
0.5
ns
3-9
tw
Clock Pulse Width
HIGH or LOW
5.0
2.0
3.5
3.5
ns
3-6
tw
HIGH or LOW
5.0
2.0
3.5
3.5
ns
3-6
tw
Clock Pulse Width (Count)
HIGH or LOW
5.0
2.0
3.5
3.5
ns
3-6
tw
HIGH or LOW
5.0
2.0
3.5
3.5
ns
3-6
* Voltage Range 5.0 V is 5.0 V ±0.5 V.
CAPACITANCE
Symbol Parameter Value
Typ Unit Test Conditions
CIN Input Capacitance 4.5 pF VCC = 5.0 V
CPD Power Dissipation Capacitance 45 pF VCC = 5.0 V
MC74AC161 MC74ACT161 MC74AC163 MC74ACT163
5-12
FACT DATA
OUTLINE DIMENSIONS
N SUFFIX
PLASTIC DIP PACKAGE
CASE 648–08
ISSUE R
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
1 8
16 9
SEATING
PLANE
F
J
M
RX 45
_
G
8 PLP
–B–
–A–
M
0.25 (0.010) B S
–T–
D
K
C
16 PL
S
B
M
0.25 (0.010) A S
T
DIM MIN MAX MIN MAX
INCHESMILLIMETERS
A9.80 10.00 0.386 0.393
B3.80 4.00 0.150 0.157
C1.35 1.75 0.054 0.068
D0.35 0.49 0.014 0.019
F0.40 1.25 0.016 0.049
G1.27 BSC 0.050 BSC
J0.19 0.25 0.008 0.009
K0.10 0.25 0.004 0.009
M0 7 0 7
P5.80 6.20 0.229 0.244
R0.25 0.50 0.010 0.019
____
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
–A–
B
FC
S
HGD
J
L
M
16 PL
SEATING
1 8
916
K
PLANE
–T–
M
A
M
0.25 (0.010) T
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.740 0.770 18.80 19.55
B0.250 0.270 6.35 6.85
C0.145 0.175 3.69 4.44
D0.015 0.021 0.39 0.53
F0.040 0.70 1.02 1.77
G0.100 BSC 2.54 BSC
H0.050 BSC 1.27 BSC
J0.008 0.015 0.21 0.38
K0.110 0.130 2.80 3.30
L0.295 0.305 7.50 7.74
M0 10 0 10
S0.020 0.040 0.51 1.01
____
How to reach us:
USA/EUROPE: Motorola Literature Distribution; JAPAN: Nippon Motorola Ltd.; Tatsumi–SPD–JLDC, Toshikatsu Otsuki,
P.O. Box 20912; Phoenix, Arizona 85036. 1–800–441–2447 6F Seibu–Butsuryu–Center, 3–14–2 Tatsumi Koto–Ku, Tokyo 135, Japan. 03–3521–8315
MFAX: RMFAX0@email.sps.mot.com –TOUCHTONE (602) 244–6609 HONG KONG: Motorola Semiconductors H.K. Ltd.; 8B Tai Ping Industrial Park,
INTERNET: http://Design–NET.com 51 Ting Kok Road, Tai Po, N.T., Hong Kong. 852–26629298
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty , representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters can and do vary in dif ferent
applications. All operating parameters, including “T ypicals” must be validated for each customer application by customer’s technical experts. Motorola does
not convey any license under its patent rights nor the rights of others. Motorola products are not designed, intended, or authorized for use as components in
systems intended for surgical implant into the body , or other applications intended to support or sustain life, or for any other application in which the failure of
the Motorola product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such
unintended or unauthorized application, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless
against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal Opportunity/Affirmative Action Employer .
MC74AC161/D
*MC74AC161/D*
◊