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參數資料
| 型號： | KK74HC123AD |
| 廠商： | KODENSHI CORP. |
| 英文描述： | Dual Retriggerable Monostable Multivibrator |
| 中文描述： | 雙Retriggerable單穩態觸發器 |
| 文件頁數： | 1/7頁 |
| 文件大小： | 188K |
| 代理商： | KK74HC123AD |
TECHNICAL DATA
K K
74HC123A
Dual Retriggerable Monostable
Multivibrator
The
KK
74HC123A is identical in pinout to the LS/ALS123. The
device inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
There are two trigger inputs, A INPUT (negative edge) and
B INPUT (positive edge). These inputs are valid for rising/falling signals.
The device may also be triggered by using the CLR input (positive-
edge) because of the Schmitt-trigger input; after triggering the output
maintains the MONOSTABLE state for the time period determined by the
external resistor R
X
and capacitor C
X
. Taking CLR low breaks this
MONOSTABLE STATE. If the next trigger pulse occurs during the
MONOSTABLE period it makes the MONOSTABLE period longer.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 3.0 to 6.0 V
Low Input Current: 1.0
μ
A
High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION
KK
74HC123AN Plastic
KK
74HC123AD SOIC
T
A
= -55
°
to 125
°
C for all packages
LOGIC DIAGRAM
PIN 16 =V
CC
PIN 8 = GND
PIN ASSIGNMENT
FUNCTION TABLE
Inputs
Outputs
Note
A
B
CLR
Q
Q
H
H
Output
Enable
X
L
H
L
*
L
*
H
*
H
*
Inhibit
H
X
H
Inhibit
L
H
Output
Enable
L
H
Output
Enable
X
X
L
L
H
Inhibit
X = don’t care
*
- except for monostable period
Note
(1) C
X
, R
X
, D
X
are external components.
(2) D
X
is a clamping diode.
The external capacitor is charged to V
CC
in the stand-by
state, i.e. no trigger. When the supply voltage is turned off
C
X
is discharged mainly through an internal parasitic diode.
If C
X
is sufficiently large and V
CC
decreases rapidy, there
will be some possibility of damaging the I.C. with a surge
current or latch-up. If the voltage supply filter capacitor is
large enough and V
CC
decrease slowly, the surge current is
automatically limited and damage the I.C. is avoided. The
maximum forward current of the parasitic diode is
approximately 20 mA.
1
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PDF描述 |
|---|---|
| KK74HC123AN | Dual Retriggerable Monostable Multivibrator |
| KK74HC125A | Quad 3-State Noninverting Buffers |
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| KK74HC125AN | Replacement for Texas Instruments part number SN74LS193N. Buy from authorized manufacturer Rochester Electronics. |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| KK74HC123AN | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Dual Retriggerable Monostable Multivibrator |
| KK74HC125A | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Quad 3-State Noninverting Buffers |
| KK74HC125AD | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Quad 3-State Noninverting Buffers |
| KK74HC125AN | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Quad 3-State Noninverting Buffers |
| KK74HC132A | 制造商:KODENSHI 制造商全稱:KODENSHI KOREA CORP. 功能描述:Quad 2-Input NAND Gate with Schmitt-Trigger Inputs High-Performance Silicon-Gate CMOS |
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