Analog Devices Inc./Maxim Integrated DS1033M-12

Overview

DS1033M-12 from Maxim Integrated (formerly Dallas Semiconductor) is a low-power, +3.3V silicon delay line IC providing three independent buffered logic delays of precisely 12 ns each, with ±1.5 ns initial tolerance and ±1.0 ns additional variation over temperature (0°C to +70°C) and supply voltage (2.7V–3.6V). It operates in standard 8-pin PDIP packaging and preserves input signal symmetry via leading/trailing edge precision-used in high-fidelity clock/data alignment for test instrumentation and digital timing calibration.

For engineers reviewing the DS1033M-12 datasheet, DS1033M-12 pinout, DS1033M-12 application, or DS1033M-12 equivalent, key selection considerations include guaranteed 12 ns per-output delay accuracy, all-silicon reliability versus ceramic or analog alternatives, VCC=2.7–3.6V operation, and compatibility with 50 Ω source impedance and 15 pF load conditions.

Technical Context

The DS1033M-12 implements three identical, isolated CMOS buffer-delay stages in a single monolithic silicon die, each delivering fixed 12 ns propagation delay (tPLH/tPHL) referenced to the 1.5 V switching threshold. Its architecture avoids analog RC or LC elements, eliminating drift and enabling stable performance across voltage and temperature without trimming.

It supports TTL/CMOS-compatible input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V), drives 74F04-equivalent loads, and maintains <3.5 ns output rise/fall times under 15 pF loading. Power-up time is 100 ms, and active supply current is 25 mA at VCC = 3.6 V with 1 µs period input.

Key Specifications

Pinout & Package

DS1033M-12 is housed in an industry-standard 8-pin plastic dual in-line package (PDIP), 300 mil width, with pin 1 identified by notch or dot marking. The package is vapor-phase, IR, and wave solderable, and RoHS/lead-free status is not applicable (non-RoHS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1033M-12, DS1033Z-12 offers identical delay performance in a smaller SOIC package ideal for high-density layouts, while DS1033M-10 provides a 2 ns shorter delay with no other changes-making it a direct parametric alternative when minor timing adjustment suffices.

Availability

DS1033M-12 is available at Aetrix Electronics and suitable for digital test equipment calibration, high-speed logic timing alignment, and embedded system boot timing control requiring stable component supply and long-term obsolescence management.

Supply support for DS1033M-12 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 Dallas Semiconductor in 2001) designs precision analog, mixed-signal, and timing ICs for industrial, communications, and computing applications.

The DS1033 series was developed as a reliable, all-silicon replacement for ceramic delay lines in digital timing-critical systems where stability, repeatability, and lead-free process compatibility were essential.

FAQ

What is the guaranteed delay accuracy of DS1033M-12 over its full operating temperature range?

The DS1033M-12 guarantees ±1.0 ns additional delay variation over 0°C to +70°C at VCC = 3.3 V, on top of its ±1.5 ns initial tolerance at +25°C. This means total delay deviation remains within ±2.5 ns across temperature - a key specification for deterministic timing budgets in test and measurement gear where DS1033M-12 is commonly deployed.

Can DS1033M-12 operate from a 2.5 V supply?

No. DS1033M-12 is specified only for VCC = 2.7 V to 3.6 V. Operation below 2.7 V violates the Absolute Maximum Ratings and may result in undefined delay behavior, increased propagation skew, or failure to meet tPLH/tPHL specifications. For 2.5 V systems, consider verifying alternate solutions - DS1033M-12 requires strict adherence to its rated supply range.

Is DS1033M-12 RoHS compliant?

No. Per Maxim's official part status documentation, DS1033M-12 is non-RoHS/lead-containing. Its PDIP package uses traditional leaded solder finish. RoHS-compliant alternatives include DS1033Z-8+, which is the only lead-free variant in the family - DS1033M-12 itself does not meet RoHS Directive 2011/65/EU requirements.

How many independent delay paths does DS1033M-12 provide, and are they electrically isolated?

DS1033M-12 provides three fully independent delay paths (IN1→OUT1, IN2→OUT2, IN3→OUT3), each with identical 12 ns delay. Electrical isolation is confirmed by layout and test data: no measurable crosstalk (<0.5% signal coupling) occurs between inputs or outputs, and each output is individually buffered to prevent load-induced delay shifts on adjacent channels - a core design feature of DS1033M-12.

What is the maximum recommended output load capacitance for DS1033M-12?

The DS1033M-12 is characterized and specified for a 15 pF capacitive load, matching one 74F04 input gate. Exceeding 15 pF increases output rise/fall times beyond the 2.0–3.5 ns spec, degrades edge symmetry, and may cause delay variation exceeding ±1.0 ns. For heavier loads, external buffering is required - DS1033M-12's drive strength is optimized for light, controlled-impedance loads only.