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參數資料
| 型號： | MM54HC390J |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 計數器 |
| 英文描述： | HC/UH SERIES, ASYN NEGATIVE EDGE TRIGGERED 3-BIT UP DECADE COUNTER, CDIP16 |
| 封裝： | DIP-16 |
| 文件頁數： | 1/8頁 |
| 文件大小： | 149K |
| 代理商： | MM54HC390J |
TLF5337
MM54HC390MM74HC390
Dual
4-Bit
Decade
Counter
MM54HC393MM74HC393
Dual
4-Bit
Binary
Counter
January 1988
MM54HC390MM74HC390
Dual 4-Bit Decade Counter
MM54HC393MM74HC393
Dual 4-Bit Binary Counter
General Description
These counter circuits contain independent ripple carry
counters and utilize advanced silicon-gate CMOS technolo-
gy The MM54HC390MM74HC390 incorporate dual dec-
ade counters each composed of a divide-by-two and a di-
vide-by-five counter The divide-by-two and divide-by-five
counters can be cascaded to form dual decade dual bi-qui-
nary or various combinations up to a single divide-by-100
counter The MM54HC393MM74HC393 contain two 4-bit
ripple carry binary counters which can be cascaded to cre-
ate a single divide-by-256 counter
Each of the two 4-bit counters is incremented on the high to
low transition (negative edge) of the clock input and each
has an independent clear input When clear is set high all
four bits of each counter are set to a low level This enables
count truncation and allows the implementation of divide-by-
N counter configurations
Each of the counters outputs can drive 10 low power
Schottky TTL equivalent loads These counters are func-
tionally as well as pin equivalent to the 54LS39074LS390
and the 54LS39374LS393 respectively All inputs are pro-
tected from damage due to static discharge by diodes to
VCC and ground
Features
Y
Typical operating frequency 50 MHz
Y
Typical propagation delay 13 ns (Ck to QA)
Y
Wide operating supply voltage range 2 – 6V
Y
Low input current k1 mA
Y
Low quiescent supply current 80 mA maximum
(74HC Series)
Y
Fanout of 10 LS-TTL loads
Connection Diagrams
Dual-In-Line Package
TLF5337 – 1
Top View
Order Number MM54HC390 or MM74HC390
Dual-In-Line Package
TLF5337 – 2
Top View
Order Number MM54HC393 or MM74HC393
C1995 National Semiconductor Corporation
RRD-B30M105Printed in U S A
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相關代理商/技術參數 |
參數描述 |
|---|---|
| MM54HC390J883C | 制造商:NATIONAL 功能描述:8600901EA |
| MM54HC393 WAF | 制造商:Texas Instruments 功能描述: |
| MM54HC393E/883 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MM54HC393J/883 | 制造商:National Semiconductor Corporation 功能描述:Counter, Up, 4 Bit Binary, 14 Pin, Ceramic, DIP 制造商:Texas Instruments 功能描述: |
| MM54HC393J/883B | 制造商: 功能描述: 制造商:undefined 功能描述: |
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