Analog Devices Inc./Maxim Integrated DS1135Z-20+

Overview

DS1135Z-20+ from Maxim Integrated is a high-speed, all-silicon 3-channel digital delay line operating at +5V with identical 20ns nominal delay per output (tPLH/tPHL), ±1.0ns initial tolerance, and ±2ns total tolerance over -40°C to +85°C. It delivers precise leading/trailing edge timing for clock skew management in high-speed logic systems and replaces DS1013/DS1035 in industrial timing applications.

For engineers reviewing the DS1135Z-20+ datasheet, DS1135Z-20+ pinout, DS1135Z-20+ application, or DS1135Z-20+ equivalent, key selection criteria include guaranteed 20ns delay matching across all three outputs, 2.5ns max rise/fall time, 15pF load drive capability, and SOIC-8 (150-mil) compatibility with vapor-phase, IR, and wave soldering processes.

Technical Context

The DS1135Z-20+ implements three independent buffered delay paths in a single monolithic silicon IC, each with matched propagation characteristics for tPLH and tPHL. Its architecture preserves input signal symmetry by maintaining equal delay on both rising and falling edges - critical for duty-cycle-sensitive interfaces like LVDS clock distribution and synchronous FIFO handshaking.

It operates within 4.75V–5.25V supply range and draws ≤35mA active current. The device features TTL-compatible inputs (VIH ≥2.2V, VIL ≤0.8V) and outputs capable of driving 10 LS-TTL loads, with 10pF typical input capacitance and 15pF specified test load for AC timing validation.

Key Specifications

Pinout & Package

DS1135Z-20+ is housed in an 8-pin SOIC package (150-mil width, outline 21-0041), RoHS-compliant with "+" suffix, and compatible with standard surface-mount reflow profiles (peak 260°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-channel fixed-delay line applications.

Compared with DS1135Z-15+ and DS1135Z-25+, the DS1135Z-20+ offers the optimal balance of delay duration and tolerance margin for mid-range timing-critical interfaces such as FPGA configuration clocks and industrial serial bus synchronization - neither over-provisioning nor under-specifying delay headroom.

Availability

DS1135Z-20+ is available at Aetrix Electronics and suitable for high-speed logic skew compensation, industrial PLC timing modules, and digital test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DS1135Z-20+ 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, mixed-signal, and timing ICs for industrial, automotive, and communications applications, with emphasis on reliability and parametric guarantee.

The DS1135 series was developed as a silicon-replacement family for legacy hybrid delay lines, targeting applications demanding stable, repeatable, and solder-process-robust fixed delays in 5V logic systems.

FAQ

What is the guaranteed delay accuracy of DS1135Z-20+ over its full operating temperature range?

The DS1135Z-20+ guarantees ±2ns total delay variation over -40°C to +85°C, including both initial tolerance (±1.0ns at +25°C) and drift due to temperature and supply voltage changes. This specification applies equally to tPLH and tPHL for all three outputs, ensuring matched channel-to-channel skew remains within 1ns under worst-case conditions.

Can DS1135Z-20+ operate reliably with a 4.8V supply voltage?

Yes, DS1135Z-20+ is fully specified for operation across 4.75V–5.25V. At 4.8V, all AC and DC parameters-including 20ns delay, 2.5ns max rise/fall time, and output drive strength-remain within datasheet limits. No derating or performance loss occurs within this validated voltage window.

Does DS1135Z-20+ require external termination resistors on its inputs or outputs?

No, DS1135Z-20+ does not require external termination. Its inputs present 10pF capacitance and TTL-compatible thresholds, while outputs are designed to drive 15pF loads directly. For best timing accuracy, use controlled-impedance PCB traces and local 0.1µF VCC decoupling-but no series or parallel termination is needed.

Is DS1135Z-20+ pin-compatible with DS1013 or DS1035?

Yes, DS1135Z-20+ uses the same 8-pin SOIC (150-mil) package and identical pinout as DS1013 and DS1035, making it a direct drop-in replacement. All input/output assignments, power, and ground pins match exactly - enabling field upgrades or new designs without layout changes.

What is the maximum capacitive load DS1135Z-20+ can drive while maintaining specified delay and edge rate?

DS1135Z-20+ is characterized and guaranteed for 15pF load capacitance, which corresponds to one 74F04 input gate. Driving >15pF increases rise/fall time and may degrade delay accuracy beyond ±2ns; for heavier loads, add a fanout buffer or reduce trace capacitance via layout optimization.