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111799

FEATURES

All-silicon pulse width generator

Five programmable widths

Equal and unequal increments available

Pulse widths from 5 ns to 500 ns

Widths are stable and precise

Rising edge-triggered

Inverted and non-inverted outputs

Width tolerance

±5% or ±2 ns, whichever is

greater

Economical

Auto-insertable, low profile

Low-power CMOS

TTL/CMOS-compatible

Vapor phase, IR and wave solderable

Custom widths available

Fast turn prototypes

Extended temperature range available

PIN ASSIGNMENT

PIN DESCRIPTION

IN

– Trigger Input

P0-P2

– Programming Pins

GND

– Ground

OUT

– Pulse Output

OUT

– Inverted Pulse Output

– +5V

DESCRIPTION

The DS1040 Pulse Generator is a user-programmable one-shot with a choice of five precise pulse widths.

Maximum widths range from 50 ns to 500 ns; increments range from 2.5 ns to 100 ns. For maximum

flexibility in applications such as magneto-optical read/write disk laser power control, varieties are

offered with equal and unequal increments. The DS1040 is offered in standard 8-pin DIPs and 8-pin

mini-SOICs. Low cost and superior reliability over hybrid technology are achieved by the combination

of a 100% CMOS silicon design and industry standard packaging. The DS1040 series of pulse generators

provide a nominal width accuracy of

±5% or ±2 ns, whichever is greater. In response to the rising edge

of the input (trigger) pulse, the DS1040 produces an output pulse with a width determined by the logic

states of the three parallel programming pins. For convenience, both inverting and non-inverting outputs

are supplied. The intrinsic delay between the trigger pulse and the output pulse is no more than 10 ns.

Each output is capable of driving up to five 74LS loads.

Dallas Semiconductor can customize standard products to meet special needs. For special request and

rapid delivery, call (972) 371–4348.

DS1040

Programmable One-Shot

Pulse Generator

www.dalsemi.com

DS1040Z 8-Pin SOIC (150-mil)

See Mech. Drawings Section

IN

OUT

OUT

GND

P2

P0

P1

1

2

3

4

8

7

6

5

DS1040M 8-Pin DIP (300-mil)

See Mech. Drawings Section

P2

P0

P1

IN

OUT

OUT

GND

1

2

3

4

8

7

6

5