Analog Devices Inc./Maxim Integrated DS1023S-50

Overview

DS1023S-50 from Maxim Integrated (formerly Dallas Semiconductor) is an 8-bit programmable silicon delay line configured for 0.5 ns step resolution, supporting delay ranges up to 127.5 ns with ±2 ns integral non-linearity, reference delay compensation, and dual-mode output (delayed/non-inverted or PWM/inverted) - used in clock phase alignment, pulse width modulation, and free-running oscillator circuits.

For engineers reviewing the DS1023S-50 datasheet, DS1023S-50 pinout, DS1023S-50 application, or DS1023S-50 equivalent, this page delivers verified timing parameters, mode-select behavior, serial/parallel programming interface timing, reference delay calibration, and SOIC-16 package implementation guidance.

Technical Context

The DS1023S-50 implements a digitally programmable analog delay path using switched-capacitor or tapped-delay-line architecture, enabling precise sub-nanosecond timing control. It supports three functional modes: normal delay line (IN→OUT), pulse width modulator (IN→PWM), and free-running oscillator (OUT→IN feedback), all selectable via the MS pin.

Delay programming occurs via 8-bit parallel inputs (P0–P7) or serial interface (D/P2, CLK/P1, Q/P0), with latch enable (LE) controlling data capture. The on-chip reference delay (tREF = 18–22 ns) cancels step-zero variation, allowing true 0°–360° clock phase adjustment relative to REF output.

Key Specifications

Pinout & Package

DS1023S-50 is housed in a 16-pin 300-mil SOIC package (JEDEC MS-012AC), surface-mount compatible with standard reflow profiles and IPC-7351B land patterns.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1023S-50, the DS1023-50 offers identical functionality in DIP form - ideal for breadboarding but unsuitable for SMT production; the MAX9622 trades resolution and mode flexibility for extended delay range, making it complementary rather than interchangeable in precision phase-control designs.

Availability

DS1023S-50 is available at Aetrix Electronics and suitable for clock synchronization, PWM generation, oscillator design, and timing calibration requiring stable component supply, full datasheet compliance, and long-term industrial availability.

Supply support for DS1023S-50 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 (now part of Analog Devices) designs precision analog and mixed-signal ICs for timing, power, sensing, and communication applications.

The DS1023S-50 belongs to Maxim's programmable timing element product line, engineered for sub-nanosecond delay accuracy, reference-compensated phase control, and multi-mode flexibility in test, telecom, and digital system design.

FAQ

What is the minimum usable delay step for DS1023S-50?

The DS1023S-50 provides a guaranteed 0.5 ns delay step size, with typical performance of 0.5 ns and worst-case tolerance of ±0.5 ns (0–1.5 ns). This step resolution enables precise clock edge placement in high-speed digital systems, and the on-chip reference delay allows effective zero-delay operation by offsetting the inherent step-zero delay.

How does the REF output function in DS1023S-50 timing calibration?

The REF output of DS1023S-50 delivers a fixed ~20 ns delay (18–22 ns) that matches the device's step-zero delay. When measuring delay relative to REF instead of ground-referenced IN, the DS1023S-50 achieves true zero-relative timing - eliminating process- and temperature-induced offsets and enabling accurate 0°–360° phase adjustment in clock distribution networks.

Can DS1023S-50 generate PWM signals without external components?

Yes - DS1023S-50 natively supports PWM generation in MS=1 mode. With IN as trigger and REF/PWM as output, it produces pulses whose width equals the programmed delay value (minimum 5 ns). No external logic or RC networks are required; the internal gating and inversion circuitry fully implement the PWM function using only the DS1023S-50 and its supply rails.

What happens to DS1023S-50 outputs during power-up or reset?

At power-up, DS1023S-50 requires 100 ms stabilization (tPU) before valid delay operation. During this time, outputs are undefined. Once powered, the device retains its last programmed delay value across VCC transitions if LE remains high and no new programming occurs. There is no internal non-volatile memory - delay state is volatile and must be reloaded after each power cycle.

Is DS1023S-50 compatible with 3.3V logic systems?

No - DS1023S-50 operates exclusively from a 4.75–5.25 V supply and features TTL/CMOS 5V input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V). Direct interfacing with 3.3V systems requires level-shifting on IN, P/S, MS, LE, and P0–P7 lines; the outputs swing rail-to-rail and may damage 3.3V receivers without current-limiting or translation.