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参数资料
| 型号： | SN54HC191W |
| 厂商： | Texas Instruments, Inc. |
| 元件分类： | 基准电压源/电流源 |
| 英文描述： | 300mA, 2.5V +/-1% Output Voltage, Low Dropout Voltage Regulator, Pb-Free Device; Package: SOT-223 (TO-261) 4 LEAD; No of Pins: 4; Container: Tape and Reel; Qty per Container: 4000 |
| 中文描述： | 4位同步向上/向下二进制计数器 |
| 文件页数： | 4/10页 |
| 文件大小： | 156K |
| 代理商： | SN54HC191W |
SN54HC191, SN74HC191
4-BIT SYNCHRONOUS UP/DOWN BINARY COUNTERS
SCLS121B – DECEMBER 1982 – REVISED MAY 1997
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
typical load, count, and inhibit sequence
The following sequence is illustrated below:
1.
Load (preset) to binary 13
2.
Count up to 14, 15 (maximum), 0, 1, and 2
3.
Inhibit
4.
Count down to 1, 0 (minimum), 15, 14, and 13
Data
Inputs
Data
Outputs
LOAD
A
B
C
D
CLK
D/U
CTEN
MAX/MIN
QA
QB
QC
QD
Load
Count Up
Inhibit
13
14
15
0
1
2
RCO
Count Down
2
2
1
0
15
14
13
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