Analog Devices Inc./Maxim Integrated DS1023S-200

Overview

DS1023S-200 from Maxim Integrated (formerly Dallas Semiconductor) is an 8-bit programmable silicon delay line configured as a timing element for clock phase control, pulse width modulation, and free-running oscillator generation. It provides 2 ns step resolution, 510 ns maximum absolute delay (wrt REF), ±8 ns integral non-linearity, and operates from a single 5 V supply in SOIC-16 package.

For engineers reviewing the DS1023S-200 datasheet, DS1023S-200 pinout, DS1023S-200 application, or DS1023S-200 equivalent, this device supports precise sub-cycle clock alignment, hardware-based PWM generation with 5 ns minimum pulse width, and daisy-chain serial programming - critical for test instrumentation, digital signal synchronization, and FPGA timing calibration.

Technical Context

The DS1023S-200 implements a digitally programmable analog delay line architecture with on-chip reference delay compensation, enabling full 0–360° clock phase adjustment by offsetting step-zero delay (~16.5–22 ns) against programmed values. Its dual-output mode (controlled by MS pin) delivers either delayed/non-inverted OUT + fixed REF outputs (MS = 0) or PWM + delayed/inverted OUT outputs (MS = 1).

Programming occurs via parallel (P0–P7, LE, P/S) or serial (D/P2, CLK/P1, Q/P0, LE, P/S) interface, sharing pins between modes. Serial operation supports daisy-chaining multiple units with MSB-first shifting and destructive readback with resistor-based auto-restoration - all while maintaining 500 ns delay validity after latch enable assertion.

Key Specifications

Pinout & Package

DS1023S-200 is housed in a 300-mil 16-pin SOIC package (JEDEC MS-012AC), pin-compatible with DS1023 DIP variant. All unused parallel inputs (P3–P7) must be tied to defined logic levels; serial output Q/P0 may float if unused.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1023-200, the DS1023S-200 offers identical timing performance in a space-saving SOIC package, while the MAX9622 provides analog adjustability but lacks digital configurability, reference compensation, and multi-device coordination - making DS1023S-200 the sole choice for deterministic, software-controlled nanosecond timing in digital systems.

Availability

DS1023S-200 is available at Aetrix Electronics and suitable for digital test equipment, FPGA timing calibration, and laser pulse control requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for DS1023S-200 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 DS1023 product line was developed as a programmable silicon timing element family to replace discrete RC networks and crystal-based oscillators in digital systems requiring field-adjustable, repeatable nanosecond delays.

FAQ

What is the maximum input frequency supported by DS1023S-200?

The DS1023S-200 supports a maximum input frequency of 25 MHz, determined by its minimum input pulse width specification of 20 ns. This limit applies in normal delay mode (MS = 0) and ensures accurate registration of input transitions across the full 256-step delay range. In PWM mode, usable frequency depends on programmed delay plus step-zero delay, but system-level timing remains constrained by the 20 ns pulse width requirement.

How does the REF output improve timing accuracy in DS1023S-200?

The REF output in DS1023S-200 provides a fixed 18–22 ns delay that cancels inherent step-zero variation, enabling true zero-relative delay measurements. When used as a reference point, it removes temperature- and voltage-induced drift from the absolute delay path, reducing total error to ±8 ns integral non-linearity - significantly tighter than the ±22 ns absolute delay tolerance. This makes DS1023S-200 suitable for closed-loop calibration where relative timing stability matters most.

Can DS1023S-200 generate a free-running oscillator, and how is it configured?

Yes, DS1023S-200 can operate as a free-running oscillator by connecting its OUT pin back to the IN pin while setting MS = 1 (inverted delay mode). The oscillation period equals twice the programmed delay value (2 × tD), yielding frequencies from 0.98 MHz (max delay) to 22 MHz (min delay). Startup requires initial input edge; no external components are needed. Note that output frequency varies with temperature and supply voltage due to silicon delay characteristics.

What is the purpose of the P/S and LE pins in DS1023S-200 programming?

The P/S pin selects programming mode: low enables parallel loading via P0–P7, high enables serial loading via D/P2, CLK/P1, and Q/P0. The LE pin acts as a latch control - held high during data setup, then pulsed low to commit new values. In parallel mode, LE allows multiplexed bus operation; in serial mode, LE activation finalizes the 8-bit shift and updates the delay register. Both pins must meet timing specs (tDSE ≥30 ns, tEDV = 500 ns) for reliable programming.

Is DS1023S-200 pin-compatible with earlier DS1020/DS1021 devices?

No, DS1023S-200 is not pin-compatible with DS1020 or DS1021. Although programming logic is similar, DS1023S-200 repurposes P0, P1, and P2 as dual-function pins (parallel data / serial I/O), uses reversed P/S polarity, and adds MS and REF/PWM functionality absent in DS1020/DS1021. Board redesign is required to migrate; however, firmware-level delay register mapping remains consistent across the DS102x family.