ON Semiconductor MC1455, MC1455B, NCV1455B Technical data

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MC1455, MC1455B,
NCV1455B

Timers

The MC1455 monolithic timing circuit is a highly stable controller
capable of producing accurate time delays or oscillation. Additional
terminals are provided for triggering or resetting if desired. In the time
delay mode, time is precisely controlled by one external resistor and
capacitor. For astable operation as an oscillator, the free−running
frequency and the duty cycle are both accurately controlled with two
external resistors and one capacitor. The circuit may be triggered and
reset on falling waveforms, and the output structure can source or sink
up to 200 mA or drive MTTL circuits.

• Direct Replacement for NE555 Timers

• Timing from Microseconds through Hours

• Operates in Both Astable and Monostable Modes

• Adjustable Duty Cycle

• High Current Output Can Source or Sink 200 mA

• Output Can Drive MTTL

• Temperature Stability of 0.005% per °C

• Normally ON or Normally OFF Output

38

10 k

0.1 F

t = 1.1; R and C = 22 sec
Time delay (t) is variable by
changing R and C (see Figure 16).

0.01 F

4
2

MC1455

5

1.0 k

6

R

7

1.0 F

1

1N4740

20M

C

MT2

G

−10 V

Figure 1. 22 Second Solid State Time Delay Relay Circuit

V

CC

8

5 k

Threshold

Control Voltage

Trigger

6

5

2

+

Comp

A

−

5 k

+

Comp

B

−

5 k

1

Gnd Reset

R

S

Flip

Flop

Inhibit/

Reset

Q

4

3.5 k

250 V

MT1

Load

1N4003

−

10 F

+

7

3

Discharge

Output

117 Vac/60 Hz

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MARKING

DIAGRAMS

XXXXXXXXX

AWL

8

1

YYWW

P1 SUFFIX

PLASTIC PACKAGE

CASE 626

8

8

1

D SUFFIX

PLASTIC PACKAGE

CASE 751

XXXXXX

ALYW

1

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

ORDERING INFORMATION

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

(Create − Named − OrderingInfoText.)

V

I

V

R

Reset 4 8

+

0.01 F

V

O

Test circuit for measuring DC parameters (to set output and
measure parameters):
a) When V
b) When V
c) When V

c) high, apply Reset voltage, and test for current flowing into Pin 7.
c) When Reset is not in use, it should be tied to V

5

Control

Voltage

Output

I

Sink

I

Source

 2/3 VCC, VO is low.

S

 1/3 VCC, VO is high.

S

is low, Pin 7 sinks current. To test for Reset, set V

O

MC1455

3

Gnd

1

CC

7

V

CC

Discharge

Threshold

6

Trigger

2

CC

700

V

S

2.0 k

I

th

O

.

CC

Figure 2. Representative Block Diagram Figure 3. General Test Circuit

 Semiconductor Components Industries, LLC, 2004

March, 2004 − Rev. 8

1 Publication Order Number:

MC1455/D

MC1455, MC1455B, NCV1455B

MAXIMUM RATINGS (T

= +25°C, unless otherwise noted.)

A

Rating

Power Supply Voltage V
Discharge Current (Pin 7) I
Power Dissipation (Package Limitation)

P1 Suffix, Plastic Package

Derate above T

= +25°C

A

D Suffix, Plastic Package

Derate above T

= +25°C

A

Operating Temperature Range (Ambient)

MC1455B
MC1455

NCV1455B
Maximum Operating Die Junction Temperature T
Storage Temperature Range T

ELECTRICAL CHARACTERISTICS (T

Characteristics

Operating Supply Voltage Range V
Supply Current

= 5.0 V, RL = 

V

CC

= 15 V, RL = , Low State (Note 1)

V

CC

= +25°C, VCC = +5.0 V to +15 V, unless otherwise noted.)

A

Symbol Min Typ Max Unit

CC

I

CC

4.5 − 16 V

−

−

Timing Error (R = 1.0 k to 100 k) (Note 2)

Initial Accuracy C = 0.1 F

Drift with Temperature

Drift with Supply Voltage
Threshold Voltage/Supply Voltage Vth/V
Trigger Voltage

V

= 15 V

CC

= 5.0 V

V

CC

V

Trigger Current I
Reset Voltage V
Reset Current I
Threshold Current (Note 3) I
Discharge Leakage Current (Pin 7) I
Control Voltage Level

= 15 V

V

CC

= 5.0 V

V

CC

Output Voltage Low

= 10 mA (VCC = 15 V)

I

Sink

I

= 50 mA (VCC = 15 V)

Sink

= 100 mA (VCC = 15 V)

I

Sink

I

= 200 mA (VCC = 15 V)

Sink

= 8.0 mA (VCC = 5.0 V)

I

Sink

= 5.0 mA (VCC = 5.0 V)

I

Sink

Output Voltage High

V

CC

V

CC

V

CC

= 15 V (I
= 15 V (I
= 5.0 V (I

Source
Source

Source

= 200 mA)
= 100 mA)

= 100 mA)

dischg

V

V

V

Rise Time Differential Output t
Fall Time Differential Output t

CC

T

T

R

R

th

CL

OL

OH

r
f

−

−

−

− 2/3 −

−

−

− 0.5 − A

0.4 0.7 1.0 V

− 0.1 − mA

− 0.1 0.25 A

− − 100 nA

9.0

2.6

−

−

−

−

−

−

−

12.75

2.75

− 100 − ns

− 100 − ns

1. ‘Supply current when output is high is typically 1.0 mA less.

2. Tested at V

3. This will determine the maximum value of R
= 0°C for MC1455, T

4. T

low

= +70°C for MC1455, T

T

high

5. NCV prefix is for Automotive and other applications requiring site and change control.

= 5.0 V and VCC = 15 V Monostable mode.

CC

= −40°C for MC1455B, NCV1455B

low

= +85°C for MC1455B, T

high

+ RB for 15 V operation. The maximum total R = 20 M.

A

= +125°C for NCV1455B

high

Symbol Value Unit

CC

7

P

D

P

D

T

A

+18 Vdc
200 mA

625

5.0
625
160

−40 to +85

mW

mW/°C

mW

°C/W

°C

0 to +70

−40 to +125

J

stg

+150 °C

−65 to +150 °C

mA

3.0
10

1.0
50

0.1

6.0
15

−

−

−

%

PPM/°C

%/V

V

5.0

1.67

−

−

V

10

3.33

11

4.0

V

0.1

0.4

2.0

2.5

−

0.25

0.25

0.75

2.5

−

−

0.35

V

12.5

13.3

3.3

−

−

−

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2

MC1455, MC1455B, NCV1455B

150

125

100

75

50

PW, PULSE WIDTH (ns min)

25

0

V

, MINIMUM TRIGGER VOLTAGE (x VCC = Vdc)

T(min)

Figure 4. Trigger Pulse Width

2.0

1.8

1.6

1.4

1.2

(Vdc)

OH

1.0

−V

0.8

CC

V

0.6

0.4

0.2
0

1.0

2.0 5.0 10 20 50 100

Figure 6. High Output Voltage Figure 7. Low Output Voltage

I

Source

25°C

25°C

(mA)

0°C

70°C

0.30.20.10

5.0 V ≤ VCC ≤ 15 V

0.4

10

25°C

8.0

6.0

4.0

, SUPPLY CURRENT (mA)

CC

2.0

I

0

, SUPPLY VOLTAGE (Vdc)

V

CC

Figure 5. Supply Current

10

(mA)

I

Sink

= 5.0 Vdc

CC

25°C

1.0

0.1

, LOW OUTPUT VOLTAGE (Vdc)

OL

V

0.01

1.0 2.0 5.0 10 20 50 100

@ V

155.0 10

10

1.0

0.1

, LOW OUTPUT VOLTAGE (Vdc)

OL

V

0.01

1.0

25°C

2.0 5.0 10 20 50 100

I

(mA)

Sink

Figure 8. Low Output Voltage

@ VCC = 10 Vdc

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, LOW OUTPUT VOLTAGE (Vdc)

V

3

OL

1.0

0.1

0.01

10

25°C

1.0

2.0 5.0 10 20 50 100

I

(mA)

Sink

Figure 9. Low Output Voltage

@ VCC = 15 Vdc