MOTOROLA MC1455P1, MC1455BP1, MC1455D, MC1455DR2, MC1455BDR2 Datasheet

Timing Circuit

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

Order this document by MC1455/D

MC1455, B

TIMING CIRCUIT

SEMICONDUCTOR

TECHNICAL DATA

P1 SUFFIX
PLASTIC PACKAGE
CASE 626	8
	1
	D SUFFIX
8	PLASTIC PACKAGE
	CASE 751
1	(SO±8)

Figure 1. 22 Second Solid State Time Delay Relay Circuit

			1.0 k					Load
						MT2
	3	8	6			G	MT1		Hz
	4
10 k				R	20 M				Vac/60
	2	MC1455	7
	5								117
0.1 μF	0.01 μF		1.0 μF		C
		1
						±10 V		1N4003
							3.5 k	±	μF
t = 1.1; R and C = 22 sec					1N4740		250 V	10
Time delay (t) is variable by								+
changing R and C (see Figure 16).

Figure 2. Representative Block Diagram

VCC

		8
	6	5 k			7
Threshold		+
					Discharge
	5	Comp		Flip
			A
Control Voltage		±		R Flop
		5 k		Q	3
		+		S Inhibit/
					Output
	2	Comp		Reset
Trigger		±	B
		5 k
			1	4
			Gnd	Reset

ORDERING INFORMATION

		Operating
	Device	Temperature Range	Package
	MC1455P1	TA = 0° to +70°C	Plastic DIP
	MC1455D		SO±8
	MC1455BD	TA = ± 40° to +85°C	SO±8
	MC1455BP1		Plastic DIP

	Figure 3. General Test Circuit
	VR				ICC	VCC
	Reset	4	8	7		700
+	5		VCC
0.01 μF	Control			Discharge
	Voltage	MC1455
	3			Threshold			VS
	Output			6	Ith	2.0 k
		Gnd
VO	ISink		Trigger
		1	2
	ISource

Test circuit for measuring DC parameters (to set output and measure parameters):

a)When VS w 2/3 VCC, VO is low.

b)When VS v 1/3 VCC, VO is high.

c)When VO is low, Pin 7 sinks current. To test for Reset, set VO high, apply Reset voltage, and test for current flowing into Pin 7. When Reset is not in use, it should be tied to VCC.

Motorola, Inc. 1999

Rev 4, 06/1999

		MC1455, B
MAXIMUM RATINGS (TA = +25°C, unless otherwise noted.)
Rating	Symbol		Value	Unit
Power Supply Voltage	VCC		+18	Vdc
Discharge Current (Pin 7)	I7		200	mA
Power Dissipation (Package Limitation)
P1 Suffix, Plastic Package	PD		625	mW
Derate above TA = +25°C			5.0	mW/°C
D Suffix, Plastic Package	PD		625	mW
Derate above TA = +25°C			160	°C/W
Operating Temperature Range (Ambient)	TA			°C
MC1455B			±40 to +85
MC1455			0 to +70
Storage Temperature Range	Tstg		±65 to +150	°C

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

Characteristics	Symbol	Min	Typ	Max	Unit
Operating Supply Voltage Range	VCC	4.5	±	16	V
Supply Current	ICC				mA
VCC = 5.0 V, RL = R		±	3.0	6.0
VCC = 15 V, RL = R, Low State (Note 1)		±	10	15
Timing Error (R = 1.0 kΩ to 100 kΩ) (Note 2)
Initial Accuracy C = 0.1 μF		±	1.0	±	%
Drift with Temperature		±	50	±	PPM/°C
Drift with Supply Voltage		±	0.1	±	%/V
Threshold Voltage/Supply Voltage	Vth/VCC	±	2/3	±
Trigger Voltage	VT				V
VCC = 15 V		±	5.0	±
VCC = 5.0 V		±	1.67	±
Trigger Current	IT	±	0.5	±	μA
Reset Voltage	VR	0.4	0.7	1.0	V
Reset Current	IR	±	0.1	±	mA
Threshold Current (Note 3)	Ith	±	0.1	0.25	μA
Discharge Leakage Current (Pin 7)	Idischg	±	±	100	nA
Control Voltage Level	VCL				V
VCC = 15 V		9.0	10	11
VCC = 5.0 V		2.6	3.33	4.0
Output Voltage Low	VOL				V
ISink = 10 mA (VCC = 15 V)		±	0.1	0.25
ISink = 50 mA (VCC = 15 V)		±	0.4	0.75
ISink = 100 mA (VCC = 15 V)		±	2.0	2.5
ISink = 200 mA (VCC = 15 V)		±	2.5	±
ISink = 8.0 mA (VCC = 5.0 V)		±	±	±
ISink = 5.0 mA (VCC = 5.0 V)		±	0.25	0.35
Output Voltage High	VOH				V
VCC = 15 V (ISource = 200 mA)		±	12.5	±
VCC = 15 V (ISource = 100 mA)		12.75	13.3	±
VCC = 5.0 V (ISource = 100 mA)		2.75	3.3	±
Rise Time Differential Output	tr	±	100	±	ns
Fall Time Differential Output	tf	±	100	±	ns

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

2.Tested at VCC = 5.0 V and VCC = 15 V Monostable mode.

3.This will determine the maximum value of RA + RB for 15 V operation. The maximum total R = 20 MΩ .

2	MOTOROLA ANALOG IC DEVICE DATA

MC1455, B

		Figure 4. Trigger Pulse Width
	150
(nsWIDTHPULSEmin)	125				CURRENTSUPPLY(mA)
	100
	75			0°C
PW,	50			25°C	CC
				70°C	,
	25
					I
	0
	0	0.1	0.2	0.3	0.4
		VT (min), MINIMUM TRIGGER VOLTAGE (x VCC = Vdc)

Figure 5. Supply Current

10

25°C

8.0

6.0

4.0

2.0

0

5.0	10	15
	VCC, SUPPLY VOLTAGE (Vdc)

Figure 6. High Output Voltage

	2.0
	1.8
	1.6			25°C
	1.4
(Vdc)
	1.2
OH	1.0
±V
CC	0.8
V	0.6
	0.4				5.0 V ≤ VCC ≤ 15 V
	0.2
	0
	1.0	2.0	5.0	10	20	50	100

ISource (mA)

Figure 8. Low Output Voltage

@ VCC = 10 Vdc

	10
(Vdc)
OUTPUT VOLTAGE	1.0					25°C
	0.1
, LOW
OL
V
	0.01
	1.0	2.0	5.0	10	20	50	100

ISink (mA)

Figure 7. Low Output Voltage

	10		@ VCC = 5.0 Vdc
(Vdc)
OUTPUT VOLTAGE	1.0				25°C
	0.1
, LOW
OL
V
	0.01
	1.0	2.0	5.0	10	20	50	100

ISink (mA)

Figure 9. Low Output Voltage

	10		@ VCC = 15 Vdc
(Vdc)
OUTPUT VOLTAGE	1.0
	0.1		25°C
, LOW
OL
V
	0.01
	1.0	2.0	5.0	10	20	50	100

ISink (mA)

MOTOROLA ANALOG IC DEVICE DATA	3

MC1455, B

Figure 10. Delay Time versus Supply Voltage

	1.015
NORMALIZED	1.010
	1.005
	1.000
TIME
, DELAY	0.995
d	0.990
t
	0.985
	0	5.0	10	15	20
			VCC, SUPPLY VOLTAGE (Vdc)

Figure 11. Delay Time versus Temperature

	1.015
NORMALIZED	1.010
	1.005
	1.000
TIME
, DELAY	0.995
d	0.990
t
	0.985
	± 75	± 50	± 25	0	25	50	75	100	125
			TA, AMBIENT TEMPERATURE (°C)

Figure 12. Propagation Delay

versus Trigger Voltage

	300
(ns)	250
TIME
DELAY	200
, PROPAGATION	150	0°C
	100
		70°C	25°C
	50
pd
t
	0
	0	0.1	0.2	0.3	0.4

VT (min), MINIMUM TRIGGER VOLTAGE (x VCC = Vdc)

4	MOTOROLA ANALOG IC DEVICE DATA