ON Semiconductor MC14538B Technical data

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

RX = 

= Farads

Features

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

• Pulse Width Range = 10 s 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 s with

Supplies Up to 6 V

• Pb−Free Packages are Available*

and RX. Output Pulse Width T = RX  CX (secs)

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PDIP−16

P SUFFIX

CASE 648

SOIC−16

D SUFFIX

CASE 751B

SOIC−16 DW SUFFIX CASE 751G

MARKING

DIAGRAMS

MC14538BCP

AWLYYWW

14538B

AWLYWW

14538B

AWLYYWW

MAXIMUM RATINGS (Voltages Referenced to V

Symbol

Vin, V

Iin, I

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied, damage may occur and reliability may be affected.

1. Temperature Derating: Plastic “P and D/DW” Packages: – 7.0 mW/C From 65C To 125C

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 to the range V

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

DC Supply Voltage Range −0.5 to +18.0 V

Input or Output Voltage Range

out

(DC or Transient) Input or Output Current

out

(DC or Transient) per Pin

Power Dissipation, per Package

(Note 1)

Operating Temperature Range −55 to +125 °C

Storage Temperature Range −65 to +150 °C

stg

Lead Temperature

(8−Second Soldering)

Parameter Value Unit

 (Vin or V

or VDD). Unused outputs must be left open.

)  VDD.

out

)

−0.5 to VDD + 0.5 V

±10 mA

500 mW

260 °C

and V

should be constrained

out

TSSOP−16

DT SUFFIX

CASE 948F

SOEIAJ−16

F SUFFIX

CASE 966

A = Assembly Location WL, L = Wafer Lot YY, Y = Year WW, W = Work Week

538B

ALYW

MC14538B

AWLYWW

ORDERING INFORMATION

See detailed ordering and shipping information in the package dimensions section on page 2 of this data sheet.

*For additional information on our Pb−Free strategy

and soldering details, please download the ON Semiconductor Soldering and Mounting

ues Reference Manual, SOLDERRM/D.

Techni

 Semiconductor Components Industries, LLC, 2005

February, 2005 − Rev. 6

1 Publication Order Number:

MC14538B/D

MC14538B

MC14528B MC14536B MC14538B

MC14541B MC4538A*

100 ns

PIN ASSIGNMENT

X/RX

RESET A

125

X/RX

RESET B

ONE−SHOT SELECTION GUIDE

1 s 10 s 100 s 1 ms 10 ms 100 ms 1 s 10 s

23 HR

5 MIN.

BLOCK DIAGRAM

RX AND CX ARE EXTERNAL COMPONENTS. V

= PIN 16

V

= PIN 8, PIN 1, PIN 15

RESET

15 14

RESET

*LIMITED OPERATING VOLTAGE (2 − 6 V)

TOTAL OUTPUT PULSE WIDTH RANGE

RECOMMENDED PULSE WIDTH RANGE

ORDERING INFORMATION

Device Package Shipping

MC14538BCP PDIP−16 500 Units / Rail MC14538BCPG PDIP−16

500 Units / Rail

(Pb−Free) MC14538BD SOIC−16 48 Units / Rail MC14538BDG SOIC−16

48 Units / Rail

(Pb−Free) MC14538BDR2 SOIC−16 2500 Units / Tape & Reel MC14538BDR2G SOIC−16

2500 Units / Tape & Reel

(Pb−Free) MC14538BDW SOIC−16 WB 47 Units / Rail MC14538BDWR2 SOIC−16 WB 1000 Units / Tape & Reel MC14538BDWR2G SOIC−16 WB

1000 Units / Tape & Reel

(Pb−Free) MC14538BDTR2 TSSOP−16* 2500 Units / Tape & Reel MC14538BF SOEIAJ−16 50 Units / Rail MC14538BFG SOEIAJ−16

50 Units / Rail

(Pb−Free) MC14538BFEL SOEIAJ−16 2000 Units / Tape & Reel MC14538BFELG SOEIAJ−16

2000 Units / Tape & Reel

(Pb−Free)

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

*This package is inherently Pb−Free.

†

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MC14538B

ELECTRICAL CHARACTERISTICS (Voltages Referenced to V

)

− 55C 25C 125C

Characteristic Symbol

Output Voltage “0” Level

= VDD or 0

“1” Level

= 0 or V

Input Voltage “0” Level

= 4.5 or 0.5 Vdc)

= 9.0 or 1.0 Vdc)

= 13.5 or 1.5 Vdc)

“1” Level

= 0.5 or 4.5 Vdc)

= 1.0 or 9.0 Vdc)

= 1.5 or 13.5 Vdc)

Output Drive Current

= 2.5 Vdc) Source

= 4.6 Vdc)

= 9.5 Vdc)

= 13.5 Vdc)

(VOL = 0.4 Vdc) Sink (V

= 0.5 Vdc)

= 1.5 Vdc)

Input Current, Pin 2 or 14 I Input Current, Other Inputs I Input Capacitance, Pin 2 or 14 C Input Capacitance, Other Inputs

= 0)

Quiescent Current

(Per Package) Q = Low, Q

= High

Quiescent Current, Active State

(Both) (Per Package) Q = High, Q

= Low

Total Supply Current at an external load capacitance (C external timing network (R

) and at

, CX)

(Note 3)

in in

Vdc

5.0 10 15

5.0

5.0 10 15

Min Max Min Typ

(Note 2)

−

4.95

9.95

14.95

−

3.5

7.0 11

– 3.0

– 0.64

– 1.6 – 4.2

0.64

1.6

4.2

0.05

−

1.5

3.0

4.0

−

4.95

9.95

14.95

−

3.5

7.0 11

– 2.4

– 0.51

– 1.3 – 3.4

0.51

1.3

3.4

– 0.88 – 2.25

0 0 0

5.0 10 15

2.25

4.50

6.75

2.75

5.50

8.25

– 4.2

– 8.8

0.88

2.25

8.8

Max Min Max

0.05

−

1.5

3.0

4.0

−

4.95

9.95

14.95

−

3.5

7.0 11

– 1.7

– 0.36

– 0.9 – 2.4

0.36

0.9

2.4

15 − ±0.05 − ±0.00001 ±0.05 − ±0.5 Adc 15 − ±0.1 − ±0.00001 ±0.1 − ±1.0 Adc

− − − − 25 − − − pF

− − − − 5.0 7.5 − − pF

5.0 10 15

5.0 10

−

5.0 10 20

2.0

−

0.005

0.010

0.015

0.04

0.08

0.13

IT = (3.5 x 10–2) RXCXf + 4CXf + 1 x 10–5 CLf I

= (8.0 x 10–2) RXCXf + 9CXf + 2 x 10–5 CLf

= (1.25 x 10–1) RXCXf + 12CXf + 3 x 10–5 CLf

where: I

where: C

in A (one monostable switching only),

in F, CL in pF, RX in k ohms, and

5.0 10 20

0.20

0.45

0.70

−

where: f in Hz is the input frequency.

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

3. The formulas given are for the typical characteristics only at 25C.

0.05

−

1.5

3.0

4.0

−

150 300 600

2.0

Unit

Vdc

mAdc

Adc

mAdc

Adc

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MC14538B

SWITCHING CHARACTERISTICS (Note 4) (C

= 50 pF, T

= 25C)

All Types

Characteristic Symbol

Output Rise Time

= (1.35 ns/pF) CL + 33 ns

TLH

= (0.60 ns/pF) CL + 20 ns

TLH

= (0.40 ns/pF) CL + 20 ns

TLH

Output Fall Time

= (1.35 ns/pF) CL + 33 ns

THL

= (0.60 ns/pF) CL + 20 ns

THL

= (0.40 ns/pF) CL + 20 ns

THL

Propagation Delay Time

A or B to Q or Q

, t t t

PLH PLH PLH

= (0.90 ns/pF) CL + 255 ns

PHL

, t

= (0.36 ns/pF) CL + 132 ns

PHL

, t

= (0.26 ns/pF) CL + 87 ns

PHL

PLH

TLH

THL

PHL

Reset to Q or Q

, t

PLH

Input Rise and Fall Times

= (0.90 ns/pF) CL + 205 ns

PHL

, t

= (0.36 ns/pF) CL + 107 ns

PHL

, t

= (0.26 ns/pF) CL + 82 ns

PHL

tr, t

Reset

B Input 5

A Input 5

Vdc

5.0 10 15

5 10 15

10 15

Min Typ

(Note 5)

−

100

50 40

100

50 40

300 150 100

250 125

−

300

1.2

0.4

No Limit

Max

200 100

600 300 220

500 250 190

5 4

1.0

0.1

0.05

Unit

s

−

Input Pulse Width

A, B, or Reset

Retrigger Time t

Output Pulse Width — Q or Q

tWH,

5.0 10 15

170

90 80

0 0 0

85 45 40

−

− s

Refer to Figures 8 and 9

= 0.002 F, RX = 100 k

CX = 0.1 F, RX = 100 k 5.0

CX = 10 F, RX = 100 k 5.0

Pulse Width Match between circuits in

the same package.

= 0.1 F, RX = 100 k

[(T

100

– T2)/T1]

5.0 10 15

10 15

5.0 10 15

198 200 202

9.3

9.4

9.5

0.91

0.92

0.93

−

210 212 214

9.86 10

10.14

0.965

0.98

0.99

± 1.0 ± 1.0 ± 1.0

230 232 234

10.5

10.6

10.7

1.03

1.04

1.06

± 5.0 ± 5.0 ± 5.0

4. The formulas given are for the typical characteristics only at 25C.

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

OPERATING CONDITIONS

External Timing Resistance R External Timing Capacitance C

X X

6. The maximum usable resistance RX is a function of the leakage of the capacitor CX, leakage of the MC14538B, and leakage due to board layout and surface resistance. Susceptibility to externally induced noise signals may occur for R

> 15 F, use discharge protection diode per Fig. 11.

7. If C

− 5.0 − (Note 6) k

− 0 − No Limit

F

(Note 7)

> 1 M..

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ON Semiconductor MC14538B Technical data

Specifications and Main Features

Frequently Asked Questions

User Manual