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MC74HC161A Datasheet PDF : 16 Pages
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MC74HC161A,
MC74HC163A
Presettable Counters
High–Performance Silicon–Gate CMOS
The MC74HC161A and HC163A are identical in pinout to the
LS161 and LS163. The device inputs are compatible with standard
CMOS outputs; with pull–up resistors, they are compatible with
LSTTL outputs.
The HC161A and HC163A are programmable 4–bit binary counters
with asynchronous and synchronous reset, respectively.
• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS, and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 mA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
• Chip Complexity: 192 FETs or 48 Equivalent Gates
RESET 1
CLOCK 2
P0 3
P1 4
P2 5
P3 6
ENABLE P 7
GND 8
16 VCC
15 RIPPLE
CARRY OUT
14 Q0
13 Q1
12 Q2
11 Q3
10 ENABLE T
9 LOAD
Figure 1. Pin Assignment
FUNCTION TABLE
Clock Reset*
L
H
H
H
H
Inputs
Output
Load Enable P Enable T
Q
X
X
L
X
H
H
H
L
H
X
X
Reset
X
Load Preset Data
H
Count
X
No Count
L
No Count
*HC163A only. HC161A is an Asynchronous Reset Device
H = high level, L = low level, X = don’t care
http://onsemi.com
16
1
PDIP–16
N SUFFIX
CASE 648
MARKING
DIAGRAMS
16
MC74HC16xAN
AWLYYWW
1
16
1
SO–16
D SUFFIX
CASE 751B
16
1
TSSOP–16
DT SUFFIX
CASE 948F
16
HC16xA
AWLYWW
1
16
HC
16xA
ALYW
1
x
= 1 or 3
A
= Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
ORDERING INFORMATION
Device
Package Shipping
MC74HC161AN
PDIP–16 2000/Box
MC74HC161AD
SOIC–16
48/Rail
MC74HC161ADR2
SOIC–16 2500/Reel
MC74HC161ADT
TSSOP–16 96/Rail
MC74HC161ADTR2 TSSOP–16 2500/Reel
MC74HC163AN
PDIP–16 2000/Box
MC74HC163AD
SOIC–16
48/Rail
MC74HC163ADR2
SOIC–16 2500/Reel
MC74HC163ADT
TSSOP–16 96/Rail
MC74HC163ADTR2 TSSOP–16 2500/Reel
© Semiconductor Components Industries, LLC, 2001
1
June, 2001 – Rev. 9
Publication Order Number:
MC74HC161A/D
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