MOTOROLA MC14538BCP, MC14538BD, MC14538BDR2, MC14538BDT, MC14538BDTR2 Datasheet

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 Semiconductor Components Industries, LLC, 2000

March, 2000 – Rev. 3

1 Publication Order Number:

MC14538B/D

MC14538B

Dual Precision

Retriggerable/Resettable

Monostable Multivibrator

The MC14538B is a dual, retriggerable, resettable monostable

multivibrator. It may be triggered from either edge of an input pulse,

and produces an accurate output pulse over a wide range of widths, the

duration and accuracy of which are determined by the external timing

components, C

and R

Output Pulse Width = (Cx) (Rx) where:

Rx is in k

Cx is in

• Unlimited Rise and Fall Time Allowed on the A Trigger Input

• Pulse Width Range = 10 µs to 10 s

• Latched Trigger Inputs

• Separate Latched Reset Inputs

• 3.0 Vdc to 18 Vdc Operational Limits

• Triggerable from Positive (A Input) or Negative–Going Edge

(B–Input)

• Capable of Driving Two Low–power TTL Loads or One Low–power

Schottky TTL Load Over the Rated Temperature Range

• Pin–for–pin Compatible with MC14528B and CD4528B (CD4098)

• Use the MC54/74HC4538A for Pulse Widths Less Than 10 µs with

Supplies Up to 6 V.

MAXIMUM RATINGS (Voltages Referenced to V

) (Note 2.)

Symbol Parameter Value Unit

DC Supply Voltage Range –0.5 to +18.0 V

, V

out

Input or Output Voltage Range

(DC or Transient)

–0.5 to V

+ 0.5 V

, I

out

Input or Output Current

(DC or Transient) per Pin

±10 mA

Power Dissipation,

per Package (Note 3.)

500 mW

Operating Temperature Range –55 to +125 °C

stg

Storage Temperature Range –65 to +150 °C

Lead Temperature

(8–Second Soldering)

260 °C

2. Maximum Ratings are those values beyond which damage to the device

may occur.

3. Temperature Derating:

Plastic “P and D/DW” Packages: – 7.0 mW/

C From 65

C T o 125

This device contains protection circuitry to guard against damage due to high

static voltages or electric fields. However, precautions must be taken to avoid

applications of any voltage higher than maximum rated voltages to this

high–impedance circuit. For proper operation, V

and V

out

should be constrained

to the range V

or V

out

)

Unused inputs must always be tied to an appropriate logic voltage level (e.g.,

either V

or V

). Unused outputs must be left open.

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A = Assembly Location

WL or L = Wafer Lot

YY or Y = Year

WW or W = Work Week

Device Package Shipping

ORDERING INFORMATION

MC14538BCP PDIP–16 2000/Box

MC14538BD SOIC–16 48/Rail

MARKING

DIAGRAMS

PDIP–16

P SUFFIX

CASE 648

MC14538BCP

AWLYYWW

MC14538BDR2 SOIC–16 2500/Tape & Reel

SOIC–16

DW SUFFIX

CASE 751G

14538B

AWLYYWW

1. For ordering information on the EIAJ version of

the SOIC packages, please contact your local

ON Semiconductor representative.

SOEIAJ–16

F SUFFIX

CASE 966

MC14538B

AWLYWW

MC14538BDT TSSOP–16 96/Rail

SOIC–16

D SUFFIX

CASE 751B

14538B

AWLYWW

TSSOP–16

DT SUFFIX

CASE 948F

538B

ALYW

MC14538BDTR2 TSSOP–16 2500/Tape & Reel

MC14538BDW SOIC–16 47/Rail

MC14538BDWR2 SOIC–16 1000/Tape & Reel

MC14538BF SOEIAJ–16 See Note 1.

MC14538BFEL SOEIAJ–16 See Note 1.

MC14538B

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PIN ASSIGNMENT

125

RESET B

RESET A

BLOCK DIAGRAM

RESET

15 14

RESET

AND C

ARE EXTERNAL COMPONENTS.

= PIN 16

= PIN 8, PIN 1, PIN 15

ONE–SHOT SELECTION GUIDE

100 ns

MC14528B

MC14536B

MC14538B

MC14541B

MC4538A*

1 µs 10 µs 100 µs 1 ms 10 ms 100 ms 1 s 10 s

*LIMITED OPERATING VOLTAGE (2 – 6 V)

TOTAL OUTPUT PULSE WIDTH RANGE

RECOMMENDED PULSE WIDTH RANGE

23 HR

5 MIN.

MC14538B

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ELECTRICAL CHARACTERISTICS (Voltages Referenced to V

)

– 55

C 25

C 125

Characteristic Symbol

Vdc

Min Max Min Typ

(4.)

Max Min Max

Unit

Output Voltage “0” Level

= V

or 0

5.0

—

0.05

—

0.05

—

0.05

Vdc

“1” Level

= 0 or V

5.0

4.95

9.95

14.95

—

4.95

9.95

14.95

5.0

—

4.95

9.95

14.95

—

Vdc

Input Voltage “0” Level

= 4.5 or 0.5 Vdc)

= 9.0 or 1.0 Vdc)

= 13.5 or 1.5 Vdc)

5.0

—

1.5

3.0

4.0

—

2.25

4.50

6.75

1.5

3.0

4.0

—

1.5

3.0

4.0

Vdc

“1” Level

= 0.5 or 4.5 Vdc)

= 1.0 or 9.0 Vdc)

= 1.5 or 13.5 Vdc)

5.0

3.5

7.0

—

3.5

7.0

2.75

5.50

8.25

—

3.5

7.0

—

Vdc

Output Drive Current

= 2.5 Vdc) Source

= 4.6 Vdc)

= 9.5 Vdc)

= 13.5 Vdc)

5.0

– 3.0

– 0.64

– 1.6

– 4.2

—

– 2.4

– 0.51

– 1.3

– 3.4

– 4.2

– 0.88

– 2.25

– 8.8

—

– 1.7

– 0.36

– 0.9

– 2.4

—

mAdc

= 0.4 Vdc) Sink

= 0.5 Vdc)

= 1.5 Vdc)

5.0

0.64

1.6

4.2

—

0.51

1.3

3.4

0.88

2.25

8.8

—

0.36

0.9

2.4

—

mAdc

Input Current, Pin 2 or 14 I

15 — ±0.05 — ±0.00001 ±0.05 — ±0.5 µAdc

Input Current, Other Inputs I

15 — ±0.1 — ±0.00001 ±0.1 — ±1.0 µAdc

Input Capacitance, Pin 2 or 14 C

— — — — 25 — — — pF

Input Capacitance, Other Inputs

= 0)

— — — — 5.0 7.5 — — pF

Quiescent Current

(Per Package)

Q = Low, Q

= High

5.0

—

5.0

—

0.005

0.010

0.015

5.0

—

150

300

600

µAdc

Quiescent Current, Active State

(Both) (Per Package)

Q = High, Q

= Low

5.0

—

2.0

—

0.04

0.08

0.13

0.20

0.45

0.70

—

2.0

mAdc

Total Supply Current at an external

load capacitance (C

) and at

external timing network (R

, C

)

(5.)

5.0

= (3.5 x 10

–2

) R

f + 4C

f + 1 x 10

–5

= (8.0 x 10

–2

) R

f + 9C

f + 2 x 10

–5

= (1.25 x 10

–1

) R

f + 12C

f + 3 x 10

–5

where: I

in µA (one monostable switching only),

where: C

in µF, C

in pF, R

in k ohms, and

where: f in Hz is the input frequency.

µAdc

4. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.

5. The formulas given are for the typical characteristics only at 25

MC14538B

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SWITCHING CHARACTERISTICS

(6.)

= 50 pF, T

= 25

All Types

Characteristic Symbol

Vdc

Min Typ

(7.)

Max

Unit

Output Rise Time

TLH

= (1.35 ns/pF) C

+ 33 ns

TLH

= (0.60 ns/pF) C

+ 20 ns

TLH

= (0.40 ns/pF) C

+ 20 ns

TLH

5.0

—

100

200

100

Output Fall Time

THL

= (1.35 ns/pF) C

+ 33 ns

THL

= (0.60 ns/pF) C

+ 20 ns

THL

= (0.40 ns/pF) C

+ 20 ns

THL

5.0

—

100

200

100

Propagation Delay Time

A or B to Q or Q

PLH

, t

PHL

= (0.90 ns/pF) C

+ 255 ns

PLH

, t

PHL

= (0.36 ns/pF) C

+ 132 ns

PLH

, t

PHL

= (0.26 ns/pF) C

+ 87 ns

PLH

PHL

5.0

—

300

150

100

600

300

220

Reset to Q or Q

PLH

, t

PHL

= (0.90 ns/pF) C

+ 205 ns

PLH

, t

PHL

= (0.36 ns/pF) C

+ 107 ns

PLH

, t

PHL

= (0.26 ns/pF) C

+ 82 ns

5.0

—

250

125

500

250

190

Input Rise and Fall Times

Reset

, t

—

µs

B Input 5

—

300

1.2

0.4

1.0

0.1

0.05

A Input 5

No Limit

—

Input Pulse Width

A, B, or Reset

5.0

170

—

Retrigger Time t

5.0

—

Output Pulse Width — Q or Q

Refer to Figures 8 and 9

= 0.002 µF, R

= 100 kΩ

5.0

198

200

202

210

212

214

230

232

234

µs

= 0.1 µF, R

= 100 kΩ 5.0

9.3

9.4

9.5

9.86

10.14

10.5

10.6

10.7

= 10 µF, R

= 100 kΩ 5.0

0.91

0.92

0.93

0.965

0.98

0.99

1.03

1.04

1.06

Pulse Width Match between circuits in

the same package.

= 0.1 µF, R

= 100 kΩ

100

[(T

– T

)/T

]

5.0

—

± 1.0

± 5.0

6. The formulas given are for the typical characteristics only at 25

7. Data labelled “Typ” is not to be used for design purposes but is intended as an indication of the IC’s potential performance.

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