ON MC1455BD, MC1455D Schematic

MC1455, MC1455B,

e

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.

Features

• 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

• Pb−Free Packages are Available

38

10 k

0.1 mF

0.01 mF

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

4 2

MC1455

5

1.0 k

6

R

7

1.0 mF

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

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

3.5 k

250 V−+

MT1

Load

1N4003

10 mF

7

3

117 Vac/60 Hz

Discharge

Output

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MARKING

DIAGRAMS

8

SOIC−8

8

1

D SUFFIX

CASE 751

1455x ALYW

G

1

8

PDIP−8

P1 SUFFIX

8

CASE 626

1

MC1455yyy

AWL

YYWWG

1

x = B or V yyy = BP1 or P1 A = Assembly Location L = Wafer Lot Y, YY = Year W, WW = Work Week G or G = Pb−Free Package

ORDERING INFORMATION

See detailed ordering and shipping information in the package dimensions section on page 9 of this data sheet.

V

I

V

R

Reset 4 8

+

0.01 mF

V

O

Test circuit for measuring DC parameters (to set output and measur 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

w 2/3 VCC, VO is low.

S

v 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

February, 2006 − Rev. 9

1 Publication Order Number:

MC1455/D

MC1455, MC1455B, NCV1455B

MAXIMUM RATINGS (T

= +25°C, unless otherwise noted.)

A

Rating Symbol Value Unit

Power Supply Voltage V Discharge Current (Pin 7) I

CC

7

+18 Vdc 200 mA

Power Dissipation (Package Limitation)

P1 Suffix, Plastic Package

Derate above T

D Suffix, Plastic Package

= +25°C

A

Derate above TA = +25°C

Operating Temperature Range (Ambient)

MC1455B MC1455

NCV1455B Maximum Operating Die Junction Temperature T Storage Temperature Range T

P

D

P

D

T

A

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

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.

ELECTRICAL CHARACTERISTICS (T

Characteristics

Operating Supply Voltage Range V Supply Current

V

= 5.0 V, RL = R

CC

VCC = 15 V, RL = R, Low State (Note 1)

= +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 mA

−

3.0 10

6.0 15

Timing Error (R = 1.0 kW to 100 kW) (Note 2)

Initial Accuracy C = 0.1 mF Drift with Temperature

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

V

CC

V

CC

= 15 V = 5.0 V

V

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

V

= 15 V

CC

VCC = 5.0 V Output Voltage Low

I

= 10 mA (VCC = 15 V)

Sink

I

= 50 mA (VCC = 15 V)

Sink

I

= 100 mA (VCC = 15 V)

Sink

= 200 mA (VCC = 15 V)

I

Sink

I

= 8.0 mA (VCC = 5.0 V)

Sink

= 5.0 mA (VCC = 5.0 V)

I

Sink

Output Voltage High

V

= 15 V (I

CC

= 15 V (I

V

CC

VCC = 5.0 V (I

Source Source

Source

= 200 mA) = 100 mA)

= 100 mA)

dischg

V

Rise Time Differential Output t Fall Time Differential Output t

T

R

th

CL

OL

OH

−

CC

T

− 2/3 −

−

− 0.5 −

R

0.4 0.7 1.0 V

− 0.1 − mA

− 0.1 0.25

− − 100 nA

9.0

2.6

−

12.75

2.75

r f

− 100 − ns

1.0 50

0.1

5.0

1.67

10

3.33

0.1

0.4

2.0

2.5

−

0.25

12.5

13.3

3.3

−

11

4.0

0.25

0.75

2.5

−

0.35

−

%

PPM/°C

%/V

V

mA

V

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 MW .

A

= +125°C for NCV1455B

high

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2

MC1455, MC1455B, NCV1455B

CC

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

(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

I

(mA)

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

@ V

= 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

MC1455, MC1455B, NCV1455B

1.015

1.010

1.005

1.000

0.995

, DELAY TIME NORMALIZED

d

t

0.990

0.985

0101510 20

5.0

VCC, SUPPLY VOLTAGE (Vdc)

Figure 10. Delay Time versus Supply Voltage

300

250

200

1.015

1.010

1.005

1.000

0.995

, DELAY TIME NORMALIZED

d

t

0.990

0.985

− 75 − 50 −25 0 25 50 75 100 125

TA, AMBIENT TEMPERATURE (°C)

Figure 11. Delay Time versus Temperature

150

100

, PROPAGATION DELAY TIME (ns)t

pd

0°C

70°C

50

0

V

T(min)

25°C

0.1 0.2 0.3 0.4

, MINIMUM TRIGGER VOLTAGE (x VCC = Vdc)

Figure 12. Propagation Delay

versus Trigger Voltage

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4

ON MC1455BD, MC1455D Schematic [ru]