Analog Devices Inc./Maxim Integrated DS1023S-100+

Overview

DS1023S-100+ from Maxim Integrated (formerly Dallas Semiconductor) is an 8-bit programmable silicon delay line configured for 1 ns step resolution, 255 ns maximum delay in normal mode, and ±4 ns integral non-linearity. It operates from a single 5V supply, supports parallel or serial programming, and delivers full 0–360° clock phase control via on-chip reference delay. Used in high-precision clock alignment, jitter reduction, and pulse width modulation in test instrumentation and digital timing systems.

For engineers reviewing the DS1023S-100+ datasheet, DS1023S-100+ pinout, DS1023S-100+ application, or DS1023S-100+ equivalent, key selection criteria include step size accuracy, REF/OUT dual-output mode selectability, guaranteed monotonicity, settling time (tEDV = 500 ns), and compatibility with 25 MHz input clocks and 20 ns minimum input pulse width.

Technical Context

The DS1023S-100+ implements a revised internal delay line architecture enabling delays up to one full clock period or more, with on-chip reference delay (tREF = 18–22 ns) used to offset step zero delay (tD0 = –2 to 0 ns) and achieve true zero-relative delay. Its dual-output functionality-controlled by MS pin-is implemented via configurable logic paths: OUT provides delayed/non-inverted or delayed/inverted output, while REF delivers fixed reference delay and PWM provides edge-triggered pulse width modulation.

Programming flexibility is achieved through shared pins (P0/Q, P1/CLK, P2/D) supporting both parallel (8-bit bus latch via LE) and serial (MSB-first daisy-chainable) modes. Unused parallel inputs (P3–P7) require defined logic levels due to CMOS input structure, and serial readback is supported with destructive-read + resistor-based auto-restoration.

Key Specifications

Pinout & Package

DS1023S-100+ is housed in a 16-pin 300-mil SOIC package (JEDEC MS-012AC), with 1.27 mm pitch, 10.16 mm × 7.49 mm body, and gull-wing leads. Pin 1 is marked with a beveled corner or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1023S-100+, the DS1023-100+ offers identical timing performance in a through-hole package but sacrifices PCB space efficiency and thermal performance, while the MAX9622EUA+ provides finer resolution at drastically reduced delay range and no digital interface-making DS1023S-100+ the sole choice for digitally programmable, full-range, dual-output delay applications.

Availability

DS1023S-100+ is available at Aetrix Electronics and suitable for digital test equipment, PLL calibration systems, PWM motor control, and embedded oscillator circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for DS1023S-100+ 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) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-reliability timing solutions for industrial, communications, and test equipment markets.

The DS1023S-100+ belongs to Maxim's programmable timing element family, designed specifically for applications demanding digitally adjustable, monotonic, and reference-compensated delay-targeting test instrumentation, clock synchronization, and digital signal conditioning.

FAQ

What is the maximum input frequency supported by the DS1023S-100+?

The DS1023S-100+ supports input frequencies up to 25 MHz in normal delay mode, verified under standard test conditions (VCC = 5.0 V ± 5%, TA = 0°C to 70°C). This corresponds to a minimum input period of 40 ns and minimum pulse width of 20 ns. Operation beyond this limit may impair timing accuracy or cause failure to resolve programmed delays.

How does the reference delay (REF) output improve timing accuracy in the DS1023S-100+?

The REF output in the DS1023S-100+ provides a fixed 18–22 ns delay that cancels step zero delay variation caused by process, voltage, and temperature. By measuring delay relative to REF instead of absolute IN-to-OUT, the DS1023S-100+ achieves zero-relative calibration and removes input transition-time sensitivity-delivering consistent 1 ns step accuracy across operating conditions.

Can the DS1023S-100+ generate a free-running oscillator, and how is it configured?

Yes, the DS1023S-100+ can function as a free-running oscillator by setting MS = 1 and externally connecting the OUT pin back to the IN pin. In this configuration, the DS1023S-100+ generates a square wave whose frequency is determined by twice the programmed delay value (f = 1/(2 × tD)). For DS1023S-100+, this yields 1.9–22 MHz output depending on the programmed code.

What is the minimum usable PWM pulse width from the DS1023S-100+ REF/PWM pin?

The DS1023S-100+ guarantees reliable PWM output down to 5 ns pulse width when operating in MS = 1 mode. Programmed values below this threshold may result in degraded high-level voltage or complete loss of output pulse due to internal response limitations-so 5 ns serves as the practical lower bound for functional PWM generation.

Is serial programming of the DS1023S-100+ compatible with daisy-chaining multiple devices?

Yes, the DS1023S-100+ supports daisy-chained serial programming: the Q/P0 pin of one device connects to the D/P2 pin of the next, with shared CLK/P1 and P/S lines. Each device consumes eight clock cycles, and the entire chain shifts out prior contents during loading-enabling single-MCU control of multiple DS1023S-100+ units without additional GPIOs.