Datasheet CD4538BC (Fairchild)
| Manufacturer | Fairchild |
| Description | Dual Precision Monostable |
| Pages / Page | 12 / 1 — CD453. 8BC. Dual. CD4538BC Dual Precision Monostable. Prec. General … |
| File Format / Size | PDF / 140 Kb |
| Document Language | English |
CD453. 8BC. Dual. CD4538BC Dual Precision Monostable. Prec. General Description. Features. isi. on Monost. Ordering Code:. Order Number
Model Line for this Datasheet
Text Version of Document
CD453
October 1987 Revised April 2002
8BC Dual CD4538BC Dual Precision Monostable Prec General Description Features isi
The CD4538BC is a dual, precision monostable multivibra- ■ Wide supply voltage range: 3.0V to 15V tor with independent trigger and reset controls. The device
on Monost
■ High noise immunity: 0.45 VCC (typ.) is retriggerable and resettable, and the control inputs are ■ Low power TTL compatibility: internally latched. Two trigger inputs are provided to allow Fan out of 2 driving 74L or 1 driving 74LS either rising or falling edge triggering. The reset inputs are active LOW and prevent triggering while active. Precise ■ New formula: control of output pulse-width has been achieved using lin- PWOUT = RC (PW in seconds, R in Ohms, C in Farads) ear CMOS techniques. The pulse duration and accuracy ■ ±1.0% pulse-width variation from part to part (typ.)
a
are determined by external components RX and CX. The
bl
■ Wide pulse-width range: 1 µs to ∞ device does not allow the timing capacitor to discharge
e
■ Separate latched reset inputs through the timing pin on power-down condition. For this reason, no external protection resistor is required in series ■ Symmetrical output sink and source capability with the timing pin. Input protection from static discharge is ■ Low standby current: 5 nA (typ.) @ 5 VDC provided on all pins. ■ Pin compatible to CD4528BC
Ordering Code: 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 Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram Truth Table Inputs Outputs Clear A B Q Q
L X X L H X H X L H X X L L H H L ↓ H ↑ H H = HIGH Level L = LOW Level ↑ = Transition from LOW-to-HIGH
Top View
↓ = Transition from HIGH-to-LOW = One HIGH Level Pulse = One LOW Level Pulse X = Irrelevant © 2002 Fairchild Semiconductor Corporation DS006000 www.fairchildsemi.com
October 1987 Revised April 2002
8BC Dual CD4538BC Dual Precision Monostable Prec General Description Features isi
The CD4538BC is a dual, precision monostable multivibra- ■ Wide supply voltage range: 3.0V to 15V tor with independent trigger and reset controls. The device
on Monost
■ High noise immunity: 0.45 VCC (typ.) is retriggerable and resettable, and the control inputs are ■ Low power TTL compatibility: internally latched. Two trigger inputs are provided to allow Fan out of 2 driving 74L or 1 driving 74LS either rising or falling edge triggering. The reset inputs are active LOW and prevent triggering while active. Precise ■ New formula: control of output pulse-width has been achieved using lin- PWOUT = RC (PW in seconds, R in Ohms, C in Farads) ear CMOS techniques. The pulse duration and accuracy ■ ±1.0% pulse-width variation from part to part (typ.)
a
are determined by external components RX and CX. The
bl
■ Wide pulse-width range: 1 µs to ∞ device does not allow the timing capacitor to discharge
e
■ Separate latched reset inputs through the timing pin on power-down condition. For this reason, no external protection resistor is required in series ■ Symmetrical output sink and source capability with the timing pin. Input protection from static discharge is ■ Low standby current: 5 nA (typ.) @ 5 VDC provided on all pins. ■ Pin compatible to CD4528BC
Ordering Code: 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 Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram Truth Table Inputs Outputs Clear A B Q Q
L X X L H X H X L H X X L L H H L ↓ H ↑ H H = HIGH Level L = LOW Level ↑ = Transition from LOW-to-HIGH
Top View
↓ = Transition from HIGH-to-LOW = One HIGH Level Pulse = One LOW Level Pulse X = Irrelevant © 2002 Fairchild Semiconductor Corporation DS006000 www.fairchildsemi.com
