- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄25619 > M74HC40102B1R (STMICROELECTRONICS) HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 8-BIT DOWN DECADE COUNTER, PDIP16 PDF資料下載
參數(shù)資料
| 型號： | M74HC40102B1R |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 計(jì)數(shù)器 |
| 英文描述： | HC/UH SERIES, SYN POSITIVE EDGE TRIGGERED 8-BIT DOWN DECADE COUNTER, PDIP16 |
| 封裝： | PLASTIC, DIP-16 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 659K |
| 代理商： | M74HC40102B1R |
M74HC40102
7/16
FUNCTIONAL DESCRIPTION
This device is an 8-stage presettable synchronous
down counter. Carry Out/Zero Detect (CO/ZD) is
output at the "L" level for the period of 1 bit when
the readout becomes "0". This device adopts
binary coded decimal notation, making setting up
to 99 counts possible.
COUNT OPERATION
At the "H" level of control input of CLEAR, SPE
and APE, the counter carriers out down count
operation one by one at the rise of pulse given to
CLOCK input. Count operation can be inhibited by
setting Carry Input/Clock Enable CI/CE to the "H"
level.
CO/ZD is output at the "L" level when the readout
becomes "0" but is not output even if the readout
becomes "0" when CI/CE is at the "H" level, thus
maintaining the "H" level.
Synchronous cascade operation can be carried
out by using CI/CE input and CO/ZD output.
The contents of count jump to maximum count
(99) if clock is given when the readout is "0".
Therefore, operation of 100-frequency division is
carried out when clock input alone is given without
various kinds of preset operation.
PRESET AND RESET OPERATION
When Clear (CLEAR) input is set to the "L" level,
the readout is set to the maximum count
independently
of
other
inputs.
When
Asynchronous Preset Enable (APE) input is set to
the "L" level, readouts given on J0 to J7 can be
preset
asynchronously
to
the
counter
independently of inputs other than CLEAR input.
When Synchronous Preset Enable (SPE) is set to
the "L" level the readouts given on J0 to J7 can be
preset to counter synchronously with the rise of
clock. As to these operation mode, refer to the
truth table.
INPUTS
OUTPUT
CLEAR
APE
SPE
JTE
CLOCK
Qn + 1
L
XXX
X
L
H
LXL
X
L
HL
X
H
X
H
HH
L
X
L
HH
L
H
X
H
HH
L
X
Qn
HHH
X
L
Qn
HHH
X
H
X
Qn
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M74HC4538M1R | HC/UH SERIES, DUAL MONOSTABLE MULTIVIBRATOR, PDSO16 |
| M74HC590RM13TR | HC/UH SERIES, ASYN POSITIVE EDGE TRIGGERED 8-BIT UP BINARY COUNTER, PDSO16 |
| M74HC592C1R | HC/UH SERIES, ASYN POSITIVE EDGE TRIGGERED 8-BIT UP BINARY COUNTER, PQCC20 |
| M74HC593M1R | HC/UH SERIES, ASYN POSITIVE EDGE TRIGGERED 8-BIT UP BINARY COUNTER, PDSO20 |
| M74HC593TTR | HC/UH SERIES, ASYN POSITIVE EDGE TRIGGERED 8-BIT UP BINARY COUNTER, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M74HC40102C1R | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8 STAGE PRESETTABLE SYNCHRONOUS DOWN COUNTERS |
| M74HC40102F1R | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8 STAGE PRESETTABLE SYNCHRONOUS DOWN COUNTERS |
| M74HC40102M1R | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8 STAGE PRESETTABLE SYNCHRONOUS DOWN COUNTERS |
| M74HC40103 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8 STAGE PRESETTABLE SYNCHRONOUS DOWN COUNTERS |
| M74HC40103B1R | 功能描述:計(jì)數(shù)器移位寄存器 Preset Sync Dwn Cntr RoHS:否 制造商:Texas Instruments 計(jì)數(shù)器類型: 計(jì)數(shù)順序:Serial to Serial/Parallel 電路數(shù)量:1 封裝 / 箱體:SOIC-20 Wide 邏輯系列: 邏輯類型: 輸入線路數(shù)量:1 輸出類型:Open Drain 傳播延遲時間:650 ns 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。