Analog Devices Inc./Maxim Integrated DS1045S-3

Overview

DS1045S-3 from Maxim Integrated (formerly Dallas Semiconductor) is a 16-pin SOIC dual programmable silicon delay line with TTL/CMOS compatibility, 9ns–54ns delay range in 3ns increments, ±2.5ns max delay tolerance, and precise leading/trailing edge output reproduction. It serves as a drop-in replacement for hybrid delay lines in timing-critical digital synchronization circuits.

For engineers reviewing the DS1045S-3 datasheet, DS1045S-3 pinout, DS1045S-3 application, or DS1045S-3 equivalent, key selection factors include its 3ns programmable step resolution, dual independent outputs (OUTA/OUTB), parallel 4-bit programming interface (A0–A3/B0–B3), enable-controlled latching (EA/EB), and guaranteed edge-aligned delay accuracy across 0°C to 70°C.

Technical Context

The DS1045S-3 implements two independent 4-bit programmable delay paths driven by a single input (IN), each selectable from 16 discrete delay values. Its CMOS core ensures TTL-compatible drive capability (10 × 74LS loads) and low-power operation at VCC = 5V ±5%.

Delay programming uses static parallel inputs: A0–A3 set OUTA delay (9–54ns in 3ns steps); B0–B3 set OUTB delay identically. Enable pins EA and EB support synchronous latching of delay settings with tDSE = 10ns setup and tEDV = 15ns validation time.

Key Specifications

Pinout & Package

DS1045S-3 is housed in a 16-pin SOIC (300-mil body width, 1.27mm pitch), RoHS-compliant, surface-mount package compatible with standard reflow profiles per J-STD-020A.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual programmable delay line applications.

Compared with DS1045-3 and MAX9600, the DS1045S-3 uniquely combines dual independent 3ns-step delay paths, 5V TTL compatibility, and SOIC packaging-making it optimal for space-constrained, production-ready digital timing where matched dual outputs and industrial temperature stability are mandatory.

Availability

DS1045S-3 is available at Aetrix Electronics and suitable for high-speed bus timing, PWM dead-time control, logic glitch suppression, and phase-shifted clock generation requiring stable component supply across industrial and embedded production cycles.

Supply support for DS1045S-3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (acquired by Analog Devices in 2021) designs precision analog and mixed-signal ICs for industrial, communications, and computing applications.

The DS1045S-3 belongs to Maxim's programmable timing portfolio, engineered specifically to replace aging hybrid delay modules with monolithic, auto-insertable silicon solutions for digital system synchronization.

FAQ

What is the minimum and maximum programmable delay of the DS1045S-3?

The DS1045S-3 offers a programmable delay range from 9ns to 54ns in uniform 3ns increments for both OUTA and OUTB outputs. This 16-value range is selected via 4-bit parallel inputs A0–A3 (for OUTA) and B0–B3 (for OUTB). The ±2.5ns delay tolerance applies across the full 0°C to 70°C operating temperature range, ensuring predictable timing in industrial environments.

How does the DS1045S-3 handle input and output edge alignment?

The DS1045S-3 reproduces both rising and falling edges of the IN signal with identical, programmed delay values-tPLH and tPHL match within the specified ±2.5ns tolerance. This edge-aligned behavior is inherent to its all-silicon architecture and verified under AC test conditions at VCC = 5V ±5%, enabling accurate pulse-width preservation in timing-critical applications like strobe generation or reset conditioning.

Can the DS1045S-3 be used with 3.3V logic systems?

No-the DS1045S-3 is designed exclusively for 5V operation (VCC = 4.75V to 5.25V) and features TTL-compatible input thresholds (VIH ≥ 2.2V, VIL ≤ 0.8V). Its outputs swing rail-to-rail within 5V margins and drive 74LS loads directly. For 3.3V systems, level-shifting circuitry or a different device such as the MAX9600 (3.3V-only) would be required; the DS1045S-3 must not be operated outside its specified supply range.

What is the role of EA and EB pins on the DS1045S-3?

The EA and EB pins serve as active-high enable inputs that control latching of the A0–A3 and B0–B3 delay programming bits, respectively. When asserted, they sample and hold the parallel inputs to update OUTA or OUTB delay. If unused, EA and EB must be tied to VCC (logic high) to maintain static delay settings. Minimum enable pulse width is 15ns, with 10ns setup and 0ns hold time relative to data valid.

Is the DS1045S-3 pin-compatible with other DS1045 variants like DS1045-3?

Yes-the DS1045S-3 shares identical pinout, signal definitions, and electrical behavior with the through-hole DS1045-3 variant; only the package differs (SOIC vs. DIP). All 16 pins-including IN, OUTA, OUTB, A0–A3, B0–B3, EA, EB, VCC, and GND-map functionally and physically between the two. This allows direct substitution in existing designs when transitioning from prototype (DIP) to production (SOIC) without layout changes.