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MC14541B
(Rev.:2000)

Programmable Timer

ON Semiconductor 

MC14541B

PIN ASSIGNMENT

Rtc 1

Ctc 2

RS 3

NC 4

AR 5

MR 6

VSS 7

14 VDD

13 B

12 A

11 NC

10 MODE

9 Q/Q SEL

8Q

NC = NO CONNECTION

ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ ELECTRICAL CHARACTERISTICS (Voltages Referenced to VSS)

VDD

– 55_C

25_C

125_C

Characteristic

Symbol Vdc

Min

Max

Min Typ (4.) Max

Min

Max Unit

Output Voltage

Vin = VDD or 0

“0” Level VOL

5.0

10

15

—

0.05

—

—

0.05

—

—

0.05

—

0

0.05

—

0.05 Vdc

0

0.05

—

0.05

0

0.05

—

0.05

Vin = 0 or VDD

“1” Level VOH

5.0

4.95

—

4.95

5.0

10

9.95

—

9.95

10

15

14.95

—

14.95

15

—

4.95

—

Vdc

—

9.95

—

—

14.95

—

Input Voltage

“0” Level VIL

(VO = 4.5 or 0.5 Vdc)

(VO = 9.0 or 1.0 Vdc)

(VO = 13.5 or 1.5 Vdc)

“1” Level VIH

(VO = 0.5 or 4.5 Vdc)

(VO = 1.0 or 9.0 Vdc)

(VO = 1.5 or 13.5 Vdc)

Output Drive Current

(VOH = 2.5 Vdc)

(VOH = 9.5 Vdc)

(VOH = 13.5 Vdc)

IOH

Source

(VOL = 0.4 Vdc)

(VOL = 0.5 Vdc)

(VOL = 1.5 Vdc)

Sink IOL

Input Current

Iin

Input Capacitance

Cin

(Vin = 0)

Quiescent Current

IDD

(Pin 5 is High)

Auto Reset Disabled

5.0

—

1.5

—

10

—

3.0

—

15

—

4.0

—

2.25

4.50

6.75

Vdc

1.5

—

1.5

3.0

—

3.0

4.0

—

4.0

5.0

3.5

—

3.5

2.75

10

7.0

—

7.0

5.50

15

11

—

11

8.25

Vdc

—

3.5

—

—

7.0

—

—

11

—

5.0 – 7.96 — – 6.42 – 12.83

10 – 4.19 — – 3.38 – 6.75

15 – 16.3 — – 13.2 – 26.33

mAdc

— – 4.49 —

— – 2.37 —

— – 9.24 —

5.0

1.93

—

1.56

3.12

10

4.96

—

4.0

8.0

15

19.3

—

15.6

31.2

—

1.09

— mAdc

—

2.8

—

—

10.9

—

15

—

± 0.1

— ± 0.00001 ± 0.1

—

± 1.0 µAdc

—

—

—

—

5.0

7.5

—

—

pF

5.0

—

5.0

—

0.005

5.0

—

150 µAdc

10

—

10

—

0.010

10

—

300

15

—

20

—

0.015

20

—

600

Auto Reset Quiescent Current

(Pin 5 is low)

IDDR

10

15

—

250

—

—

500

—

30

250

—

1500 µAdc

82

500

—

2000

Supply Current (5.) (6.)

(Dynamic plus Quiescent)

ID

5.0

10

15

ID = (0.4 µA/kHz) f + IDD

ID = (0.8 µA/kHz) f + IDD

ID = (1.2 µA/kHz) f + IDD

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_C.

6. When using the on chip oscillator the total supply current (in µAdc) becomes: IT = ID + 2 Ctc VDD f x 10–3 where ID is in µA, Ctc is in pF,

VDD in Volts DC, and f in kHz. (see Fig. 3) Dissipation during power–on with automatic reset enabled is typically 50 µA @ VDD = 10 Vdc.

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