NSC DM9602W-883, DM9602MW8, DM9602J-883 Datasheet

June 1989

9602/DM9602 Dual Retriggerable,

Resettable One Shots

General Description

These dual resettable, retriggerable one shots have two inputs per function; one which is active high, and one which is active low. This allows the designer to employ either lead- ing-edge or trailing-edge triggering, which is independent of input transition times. When input conditions for triggering are met, a new cycle starts and the external capacitor is allowed to rapidly discharge and then charge again. The retriggerable feature permits output pulse widths to be extended. In fact a continuous true output can be maintained by having an input cycle time which is shorter than the output cycle time. The output pulse may then be terminated at any time by applying a low logic level to the RESET pin. Retriggering may be inhibited by either connecting the Q output to an active high input, or the Q output to an active low input.

Features

Y70 ns to % output width range

YResettable and retriggerableÐ0% to 100% duty cycle

YTTL input gatingÐleading or trailing edge triggering

YComplementary TTL outputs

YOptional retrigger lock-out capability

YPulse width compensated for VCC and temperature variations

YAlternate Military/Aerospace device (54xxx) is available. Contact a National Semiconductor Sales Office/Distributor for specifications.

Connection Diagram

Dual-In-Line Package

TL/F/6611 ± 1

Order Number 9602DMQB, 9602FMQB or DM9602N

See NS Package Number J16A, N16E or W16A

Function Table

	Pin No's.		Operation
A	B	CLR
HxL	L	H	Trigger
H	LxH	H	Trigger
X	X	L	Reset

H e High Voltage Level

L e Low Voltage Level

X e Don't Care

Shots One Resettable Retriggerable, Dual 9602/DM9602

C1995 National Semiconductor Corporation

TL/F/6611

RRD-B30M105/Printed in U. S. A.

Absolute Maximum Ratings (Note)

If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications.

Supply Voltage	7V
Input Voltage	5.5V
Operating Free Air Temperature Range	b55§C to a125§C
Military
Commercial	0§C to a70§C
Storage Temperature Range	b65§C to a150§C

Note: The ``Absolute Maximum Ratings'' are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the ``Electrical Characteristics'' table are not guaranteed at the absolute maximum ratings. The ``Recommended Operating Conditions'' table will define the conditions for actual device operation.

Recommended Operating Conditions

Symbol	Parameter			Military			Commercial			Units
			Min	Nom	Max	Min	Nom		Max
VCC	Supply Voltage		4.5	5	5.5	4.75	5		5.25	V
VIH	High Level Input	TA e b55§C	2
	Voltage	TA e 0§C				1.9
		TA e 25§C	1.7			1.8				V
		TA e 75§C				1.65
		TA e 125§C	1.5
VIL	Low Level Input	TA e b55§C			0.85
	Voltage	TA e 0§C							0.85
		TA e 25§C			0.9				0.85	V
		TA e 75§C							0.85
		TA e 125§C			0.85
IOH	High Level Output Current				b0.8				b0.8	mA
IOL	Low Level Output Current				16				16	mA
TA	Free Air Operating Temperature		b55		125	0			75	§C

Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)

	Symbol	Parameter	Conditions (Note 3)		Min	Typ	Max	Units
						(Note 1)
	VI	Input Clamp Voltage	VCC e Min, II e b12 mA				b1.5	V
	VOH	High Level Output	VCC e Min, IOH e Max
		Voltage	VIL e Max, VIH e Min		2.4			V
			(Note 4)
	VOL	Low Level Output	VCC e Min, IOL e Max	MIL			0.4
		Voltage	VIL e Max, VIH e Min	COM			0.45	V
			(Note 4)
	IIH	High Level Input Current	VCC e Max, VI e 4.5V				60	mA
	IIL	Low Level Input	VCC e Max	MIL VI e 0.40V			b1.6
		Current		COM VI e 0.45V			b1.6	mA
			VCC e Min	MIL VI e 0.40V			b1.24
				COM VI e 0.45V			b1.41
	IOS	Short Circuit	VCC e Max, VOUT e 1V	MIL			b25	mA
		Output Current	(Notes 2 and 4)	COM			b35
	ICC	Supply Current	VCC e Max	MIL		39	45	mA
				COM		39	50

Note 1: All typicals are at VCC e 5V, TA e 25§C.

Note 2: Not more than one output should be shorted at a time.

Note 3: Unless otherwise noted, RX e 10k for all tests.

Note 4: Ground PIN 1(15) for VOL on PIN 7(9) or VOH and IOS on PIN 6(10) and apply momentary ground to PIN 4(12). Open PIN 1(15) for VOL on PIN 6(10) or VOH and IOS on PIN 7(9).

2

Switching Characteristics VCC e 5V, TA e 25§C (See Section 1 for Test Waveforms and Output Load)

Symbol	Parameter		Conditions	Military		Commercial		Units
				Min	Max	Min	Max
tPLH	Propagation Delay Time,	Negative Trigger Input			35		40	ns
	Low-to-High Level Output	to True Output
tPHL	Propagation Delay Time,	Negative Trigger Input	CL e 15 pF		43		48	ns
	High-to-Low Level Output	To Complement Output
			CX e 0
tPW(MIN)	Minimum True Output
			RX e 5 kX		90		100
	Pulse Width							ns
	Minimum Complement				100		110
	Pulse Width
tPW	Pulse Width		RX e 10 kX	3.08	3.76	3.08	3.76	ms
			CX e 1000 pF
CSTRAY	Maximum Allowable Wiring		Pins 2, 14 to		50		50	pF
	Capacitance		GND
RX	External Timing Resistor			5	25	5	50	kX

Logic Diagrams

TL/F/6611 ± 2

Operating Rules

1. An external resistor (RX) and external capacitor (CX) are required as shown in the Logic Diagram.

2. The value of CX may vary from 0 to any necessary value
available. If,	Ð	RX (
		however, the capacitor has leakages ap-

proaching 3.0 mA or if stray capacitance from either terminal to ground is more than 50 pF, the timing equations may not represent the pulse width obtained.

3. The output pulse with (t) is defined as follows:

		1 for C l 103 pF
t e K RXCX 1 a			X
			K & 0.34
where:	RX is in kX, CX is in pF
	t is in ns
	for CX k 103 pF, see Figure 1.

for K vs CX see Figure 6.

TL/F/6611 ± 3

4.If electrolytic type capacitors are to be used, the following three configurations are recommended:

A.Use with low leakage capacitors:

The normal RC configuration can be used predictably only if the forward capacitor leakage at 5.0V is less than 3 mA, and the inverse capacitor leakage at 1.0V is less than 5 mA over the operational temperature range.

R k 0.6 RX (Max)

TL/F/6611 ± 4

3