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零件编号 | MC74AC161 | ||
描述 | Synchronous Presettable Binary Counter | ||
制造商 | ON Semiconductor | ||
LOGO | |||
1 Page
MC74AC161, MC74ACT161,
MC74AC163, MC74ACT163
Synchronous Presettable
Binary Counter
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.
Features
• 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
• These are Pb−Free Devices
VCC TC Q0 Q1 Q2 Q3 CET PE
16 15 14 13 12 11 10 9
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16
1
xxx
y
A
WL
Y
WW
G
MARKING
DIAGRAM
16
SOIC−16
D SUFFIX
CASE 751B
1
xxx16yG
AWLYWW
= AC or ACT
= 1 or 3
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 11 of this data sheet.
12345678
*R CP P0 P1 P2 P3 CEP GND
Figure 1. Pinout: 16−Lead Packages Conductors
(Top View)
PIN ASSIGNMENT
PIN FUNCTION
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−P3
PE
Parallel Data Inputs
Parallel Enable Input
Q0−Q3
TC
Flip−Flop Outputs
Terminal Count Output
© Semiconductor Components Industries, LLC, 2015
January, 2015 − Rev. 8
1
Publication Order Number:
MC74AC161/D
MC74AC161, MC74ACT161, MC74AC163, MC74ACT163
DC CHARACTERISTICS
Symbol
Parameter
VIH Minimum High Level
Input Voltage
VIL Maximum Low Level
Input Voltage
VOH Minimum High Level
Output Voltage
74ACT
74ACT
VCC
(V)
TA = +25°C
TA =
−40°C to
+85°C
Typ Guaranteed Limits
4.5 1.5 2.0
5.5 1.5 2.0
2.0
2.0
4.5 1.5 0.8
5.5 1.5 0.8
0.8
0.8
4.5 4.49 4.4
5.5 5.49 5.4
4.4
5.4
VOL Maximum Low Level
Output Voltage
4.5 − 3.86
5.5 − 4.86
4.5 0.001 0.1
5.5 0.001 0.1
3.76
4.76
0.1
0.1
4.5 −
5.5 −
IIN Maximum Input
Leakage Current
5.5 −
DICCT
IOLD
IOHD
Additional Max. ICC/Input
†Minimum Dynamic
Output Current
5.5 0.6
5.5 −
5.5 −
ICC Maximum Quiescent
Supply Current
5.5 −
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one output loaded at a time.
0.36
0.36
±0.1
−
−
−
8.0
0.44
0.44
±1.0
1.5
75
−75
80
Unit Conditions
V
VOUT = 0.1 V
or VCC − 0.1 V
V
VOUT = 0.1 V
or VCC − 0.1 V
V IOUT = −50 mA
*VIN = VIL or VIH
V −24 mA
IOH −24 mA
V IOUT = 50 mA
*VIN = VIL or VIH
V
IOL
24 mA
24 mA
mA VI = VCC, GND
mA VI = VCC − 2.1 V
mA VOLD = 1.65 V Max
mA VOHD = 3.85 V Min
mA VIN = VCC or GND
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8
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页数 | 12 页 | ||
下载 | [ MC74AC161.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
MC74AC161 | Synchronous Presettable Binary Counter | ON Semiconductor |
MC74AC163 | Synchronous Presettable Binary Counter | ON Semiconductor |
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