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参数资料
| 型号： | SNJ54HC193FKR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 计数器 |
| 英文描述： | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 4-BIT BIDIRECTIONAL BINARY COUNTER, CQCC20 |
| 封装： | CERAMIC, LCC-20 |
| 文件页数： | 12/21页 |
| 文件大小： | 757K |
| 代理商： | SNJ54HC193FKR |
SN54HC193, SN74HC193
4BIT SYNCHRONOUS UP/DOWN COUNTERS
(DUAL CLOCK WITH CLEAR)
SCLS122D DECEMBER 1982 REVISED OCTOBER 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
The outputs of the four flip-flops are triggered on a low-to-high-level transition of either count (clock) input (UP
or DOWN). The direction of counting is determined by which count input is pulsed while the other count input
is high.
All four counters are fully programmable; that is, each output may be preset to either level by placing a low on
the load (LOAD) input and entering the desired data at the data inputs. The output changes to agree with the
data inputs independently of the count pulses. This feature allows the counters to be used as modulo-N dividers
simply by modifying the count length with the preset inputs.
A clear (CLR) input has been provided that forces all outputs to the low level when a high level is applied. The
clear function is independent of the count and LOAD inputs.
These counters were designed to be cascaded without the need for external circuitry. The borrow (BO) output
produces a low-level pulse while the count is zero (all outputs low) and DOWN is low. Similarly, the carry (CO)
output produces a low-level pulse while the count is maximum (9 or 15), and UP is low. The counters then can
be cascaded easily by feeding BO and CO to DOWN and UP, respectively, of the succeeding counter.
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相关代理商/技术参数 |
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| SNJ54HC193J | 制造商:Texas Instruments 功能描述:Counter Single 4-Bit Binary UP/Down 16-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SNJ54HC194J | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| SNJ54HC20FK | 制造商:Texas Instruments 功能描述:NAND Gate 2-Element 4-IN CMOS 20-Pin LCCC Tube |
| SNJ54HC20J | 制造商:Rochester Electronics LLC 功能描述:8403901CA, DUAL 4-IN POS-NAND GATE - Bulk 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:NAND Gate 2-Element 4-IN CMOS 14-Pin CDIP Tube |
| SNJ54HC20W | 制造商:Texas Instruments 功能描述: |
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