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CD4538BCWM 数据手册 - ON Semiconductor（安森美）
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SOIC-16
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CD4538BCWM数据手册
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© 2002 Fairchild Semiconductor Corporation DS006000 www.fairchildsemi.com
October 1987
Revised April 2002
CD4538BC Dual Precision Monostable
CD4538BC
Dual Precision Monostable
General Description
The CD4538BC is a dual, precision monostable multivibra-
tor with independent trigger and reset controls. The device
is retriggerable and resettable, and the control inputs are
internally latched. Two trigger inputs are provided to allow
either rising or falling edge triggering. The reset inputs are
active LOW and prevent triggering while active. Precise
control of output pulse-width has been achieved using lin-
ear CMOS techniques. The pulse duration and accuracy
are determined by external components R
X
and C
X
. The
device does not allow the timing capacitor to discharge
through the timing pin on power-down condition. For this
reason, no external protection resistor is required in series
with the timing pin. Input protection from static discharge is
provided on all pins.
Features
■ Wide supply voltage range: 3.0V to 15V
■ High noise immunity: 0.45 V
CC
(typ.)
■ Low power TTL compatibility:
Fan out of 2 driving 74L or 1 driving 74LS
■ New formula:
PW
OUT
= RC (PW in seconds, R in Ohms, C in Farads)
■
±1.0% pulse-width variation from part to part (typ.)
■ Wide pulse-width range: 1
µs to ∞
■ Separate latched reset inputs
■ Symmetrical output sink and source capability
■ Low standby current: 5 nA (typ.) @ 5 V
DC
■ Pin compatible to CD4528BC
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Top View
Truth Table
H = HIGH Level
L = LOW Level
↑ = Transition from LOW-to-HIGH
↓ = Transition from HIGH-to-LOW
= One HIGH Level Pulse
= One LOW Level Pulse
X = Irrelevant
Order Number Package Number Package Description
CD4538BCM M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
CD4538BCWM M16B 16-Lead Small Outline Intergrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
CD4538BCN N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
Inputs Outputs
Clear A B Q Q
LXXLH
XHXLH
XXLLH
HL
↓
H ↑ H
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