參數(shù)資料
型號: 74AC16x
廠商: ON SEMICONDUCTOR
元件分類: 通用總線功能
英文描述: Synchronous Presettable Binary Counter
中文描述: 同步可預置二進制計數(shù)器
文件頁數(shù): 1/15頁
文件大?。?/td> 202K
代理商: 74AC16X
Semiconductor Components Industries, LLC, 2006
March, 2006
Rev. 7
1
Publication Order Number:
MC74AC161/D
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.
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 devices are available in Pb
free package(s). Specifications herein
apply to both standard and Pb
free devices. Please see our website at
www.onsemi.com for specific Pb
free orderable part numbers, or
contact your local ON Semiconductor sales office or representative.
15
16
14
13
12
11
10
2
1
3
4
5
6
7
V
CC
9
8
TC
Q
0
Q
1
Q
2
Q
3
CET
PE
*R
CP
P
0
P
1
P
2
P
3
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
P
0
P
3
Parallel Data Inputs
PE
Parallel Enable Input
Q
0
Q
3
Flip
Flop Outputs
TC
Terminal Count Output
http://onsemi.com
DIP
16
N SUFFIX
CASE 648
1
16
SO
16
D SUFFIX
CASE 751B
1
16
See general marking information in the device marking
section on page 11 of this data sheet.
DEVICE MARKING INFORMATION
1
16
EIAJ
16
M SUFFIX
CASE 966
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
ORDERING INFORMATION
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