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UT54ACS264 PDF预览

UT54ACS264

更新时间: 2024-10-15 01:17:47
品牌 Logo 应用领域
艾法斯 - AEROFLEX /
页数 文件大小 规格书
11页 245K
描述
Look-Ahead Carry Generators for Counters

UT54ACS264 数据手册

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Standard Products  
UT54ACS264/UT54ACTS264  
Look-Ahead Carry Generators for Counters  
Datasheet  
November 2010  
www.aeroflex.com/logic  
FEATURES  
PINOUTS  
‰ Performs look-ahead carry across n-bit counters  
‰ Accommodates active-high or active-low carry  
‰ Improves cascaded counters system performance  
‰ 1.2μ CMOS  
16-Pin DIP  
Top View  
16  
1
A1  
VDD  
- Latchup immune  
15  
14  
13  
12  
11  
10  
9
2
3
4
5
6
7
8
B1  
A0  
B2  
‰ High speed  
‰ Low power consumption  
‰ Single 5 volt supply  
‰ Available QML Q or V processes  
‰ Flexible package  
- 16-pin DIP  
A2  
B0  
CE  
A3  
C0  
B3  
C1  
RCOB  
VSS  
RCOA  
C2  
- 16-lead flatpack  
‰ UT54ACS264- SMD 5962-96576  
‰ UT54ACTS264 - SMD 5962-96577  
16-Lead Flatpack  
Top View  
DESCRIPTION  
The UT54ACS264 and the UT54ACTS264 are look-ahead gen-  
eratorsdesignedspecificallytoperformacarry-anticipateacross  
any number of n-bit counters, thus increasing system clock fre-  
quency. AcarryenableCE, andcarryoutputsRCOAandRCOB  
are provided for n-bit cascading.  
VDD  
A1  
1
16  
B2  
B1  
A0  
2
3
4
5
6
7
8
15  
14  
13  
12  
11  
10  
9
A2  
CE  
B0  
Use the counter with either active-high-carry or active-low-car-  
ry counters. For active-high-carry counters, CE is active high,  
the A set of inputs and output RCOA are used. The B set of  
inputs are connected to a low logic level. For active-low-carry  
counters, CE is active low, the B set of inputs and output RCOB  
are used. The A set of inputs are connected to a high logic level.  
C0  
A3  
C1  
B3  
RCOA  
C2  
RCOB  
VSS  
The devices are characterized over full military temperature  
range of -55°C to +125°C.  
1

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