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Data Sheet

FULL DATA SHEET (PDF, 208kB) Download   E-Mail

Description

The DS1021 is an 8-bit programmable delay line that reproduces an input logic state at the output after a user-programmed delay. It is similar to the DS1020 but with the economy of reduced specifications. Available in two versions, total delays are varied over 256 steps and range from an inherent 10ns minimum delay in both versions to a maximum delay of 137.5ns. The DS1021 can be programmed over the 3-wire serial port or the 8-pin parallel port. The DS1021 is TTL- and CMOS-compatible and capable of driving up to ten 74LS-type loads. Both leading- and trailing-edge accuracy are specified. The DS1021 is an effective, economical solution to the designer working with the complex timing requirements of mismatched ASICs or other components, or with the strict timing tolerances of increasing system clock rates. With the DS1021's programmable outputs, the user can precisely adjust timing to application needs and improve system performance. Innovative circuit designs and factory laser or EPROM trimming enhance accuracy without the need for external components, saving cost and space.

Key Features

All-silicon time delay Models with 0.25ns and 0.5ns steps Programmable using 3-wire serial port or 8-bit parallel port Leading and trailing edge accuracy Auto-insertable, low profile Low-power CMOS with TTL compatibility Vapor phase, IR, and wave solderable

Application Notes

Application Note 107: DS1020/DS1021 8-Bit Programmable Delay Lines - DS1021 Application Note 229: Delay Lines Comparison - DS1021 Application Note 592: Silicon Timed Circuits: Frequently Asked Questions - DS1021 Application Note 977: Tech Brief 34: Building Precision Pulse Width Modulators Using Delay Lines - DS1021 Application Note 979: Tech Brief 36: Building a Pulse Width Discriminator Using a Delay Line - DS1021 Application Note 983: Tech Brief 37: Replacing Passive Hybrid Delay Lines with All-Silicon Delay Lines - DS1021 Application Note 992: Tech Brief 38: Using Programmable Delay Lines - DS1021 Application Note 1779: Tech Brief 40: Understanding Programmable Delay Lines: Overview of the DS1020, DS1021, DS1023, and DS1045 - DS1021

Evaluation Kits

none

Design Guides

SYSTEM TIMING & CONTROL (PDF)

Reliability Reports

Reliability Report: DS1021.pdf Request Reliability Report for: DS1021-25 DS1021-50

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-4 of 4
DS1021-25	Notes	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1021S-25	0.25ns Steps			SOIC;16 pin;80 mm² Dwg: 56-G4009-001B (PDF) Use pkgcode/variation: W16-12*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1021S-25+				SOIC;16 pin;80 mm² Dwg: 56-G4009-001B (PDF) Use pkgcode/variation: W16+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1021-50	Notes	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1021S-50	0.50ns Steps			SOIC;16 pin;80 mm² Dwg: 56-G4009-001B (PDF) Use pkgcode/variation: W16-12*	0°C to +70°C	RoHS/Lead-Free: No Materials Analysis
DS1021S-50+				SOIC;16 pin;80 mm² Dwg: 56-G4009-001B (PDF) Use pkgcode/variation: W16+3*	0°C to +70°C	RoHS/Lead-Free: Lead Free Materials Analysis

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