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參數(shù)資料
| 型號(hào)： | SN54HC191FK |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 計(jì)數(shù)器 |
| 英文描述： | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, CQCC20 |
| 封裝： | CERAMIC, CC-20 |
| 文件頁數(shù)： | 3/13頁 |
| 文件大?。?/td> | 203K |
| 代理商： | SN54HC191FK |
SN74HC191, 4-Bit Synchronous Up/Down Binary Counters
DEVICE STATUS: ACTIVE
l
Single Down/Up Count-Control Line
l Look-Ahead Circuitry Enhances Speed of Cascaded Counters
l
Fully Synchronous in Count Modes
l
Asynchronously Presettable With Load Control
l Package Options Include Plastic Small-Outline (D) and Ceramic Flat (W) Packages,
Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs
The 'HC191 are 4-bit synchronous, reversible, up/down binary counters. Synchronous
counting operation is provided by having all flip-flops clocked simultaneously so that the
outputs change coincident with each other when instructed by the steering logic. This mode of
operation eliminates the output counting spikes normally associated with asynchronous
(ripple-clock) counters.
The outputs of the four flip-flops are triggered on a low-to-high-level transition of the clock
(CLK) input if the count-enable (CTEN\) input is low. A high at CTEN\ inhibits counting. The
direction of the count is determined by the level of the down/up (D/U\) input. When D/U\ is
low, the counter counts up, and when D/U\ is high, it counts down.
These counters feature a fully independent clock circuit. Change at the control (CTEN\ and
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RELATED DOCUMENTS
PRODUCT SUPPORT: TRAINING
PARAMETER NAME SN74HC191
Voltage Nodes (V) 6, 5, 2
Vcc range (V)
2.0 to 6.0
Input Level
CMOS
Output Level
CMOS
Output Drive (mA) -4/4
Output
2S
FEATURES
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SN54HC191W | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, CDFP16 |
| SN54HC191J | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, CDIP16 |
| SN54HC193FK | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, CQCC20 |
| SN54HC193J | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, CDIP16 |
| SN74HC193NSR | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, PDSO16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SN54HC191J | 制造商:Texas Instruments 功能描述:Counter Single 4-Bit Async Binary UP/Down 16-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:COUNTER SGL 4BIT ASYNC BINARY UP/DOWN 16CDIP - Rail/Tube |
| SN54HC193J | 制造商:Texas Instruments 功能描述:Counter Single 4-Bit Binary UP/Down 16-Pin CDIP Tube 制造商:Texas Instruments 功能描述:COUNTER SGL 4BIT BINARY UP/DOWN 16CDIP - Rail/Tube |
| SN54HC193W | 制造商:Texas Instruments 功能描述: |
| SN54HC194J | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SN54HC195J | 制造商:Texas Instruments 功能描述:Shift Register Single 4-Bit Serial/Parallel to Parallel 16-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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