Analog Devices Inc./Maxim Integrated DS1005M-75

Overview

DS1005M-75 from Dallas Semiconductor is a 5-tap all-silicon delay line with fixed tap delays of 15 ns, 30 ns, 45 ns, 60 ns, and 75 ns; ±2 ns or ±3% delay tolerance; TTL/CMOS-compatible input/output; and designed for precise edge-aligned timing in digital signal conditioning circuits used in test equipment and high-speed logic interfacing.

For engineers reviewing the DS1005M-75 datasheet, DS1005M-75 pinout, DS1005M-75 application, or DS1005M-75 equivalent, key selection criteria include tap delay accuracy, leading/trailing edge matching, load drive capability (up to ten 74LS loads), operating voltage range (4.75 V–5.25 V), and 8-pin DIP package compatibility with legacy hybrid delay line footprints.

Technical Context

The DS1005M-75 implements a monolithic silicon delay structure with five fixed, equally spaced propagation paths - not programmable or adjustable. Each tap reproduces the input logic level after its specified delay, with identical tPLH and tPHL values per tap, ensuring matched rising/falling edge timing.

It operates at 5 V ±5%, draws 40–70 mA active current, supports 40% minimum pulse width relative to Tap 5 tPLH, and maintains delay stability across 0°C–70°C ambient temperature with unidirectional drift under voltage/temperature variation.

Key Specifications

Pinout & Package

DS1005M-75 is supplied in an 8-pin DIP (300-mil) package with gull-wing leads, optimized for auto-insertion and wave soldering. Pin 1 is IN; pins 2–3 and 5–6 are TAP outputs; pin 4 is GND; pin 7 is VCC; pin 8 is unused (NC).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1005-75 and DS1005S-75, the DS1005M-75 delivers identical timing performance in a compact 8-pin DIP form factor - ideal for legacy-compatible upgrades where board area and assembly method constrain alternative packaging choices.

Availability

DS1005M-75 is available at Aetrix Electronics and suitable for digital test equipment, logic interface timing, and industrial control sequencing requiring stable component supply and long-term obsolescence management.

Supply support for DS1005M-75 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

Dallas Semiconductor (now part of Maxim Integrated, then Analog Devices) specialized in precision timing, memory, and data communication ICs with emphasis on robustness and interoperability in industrial and instrumentation systems.

The DS1005 family was engineered to replace aging hybrid delay lines with fully silicon-based alternatives offering superior temperature stability, tighter delay tolerance, and drop-in compatibility across DIP and SOIC footprints - specifically targeting test, measurement, and logic synchronization applications.

FAQ

What is the exact delay value for each tap on the DS1005M-75?

The DS1005M-75 provides five fixed tap delays: TAP 1 = 15 ns, TAP 2 = 30 ns, TAP 3 = 45 ns, TAP 4 = 60 ns, and TAP 5 = 75 ns. These values are measured as tPLH and tPHL at 1.5 V crossing points under standard conditions (VCC = 5.0 V, TA = 25°C), and apply identically to both rising and falling edges of the input signal. The DS1005M-75 datasheet confirms this in Table 1 and Notes 3–6.

Is the DS1005M-75 pin-compatible with older hybrid delay lines?

Yes - the DS1005M-75 uses an 8-pin DIP footprint matching industry-standard hybrid delay line pinouts, with IN on pin 1, GND on pin 4, VCC on pin 5, and TAP outputs distributed across pins 2, 3, 6, and 7. Dallas Semiconductor explicitly states "DIP packages are available with hybrid lead configurations" to ensure mechanical and electrical interchangeability. The DS1005M-75 achieves this without requiring PCB changes.

Can the DS1005M-75 drive standard TTL loads directly?

Yes - the DS1005M-75 is rated to drive up to ten 74LS loads per tap, with IOL = 12 mA and IOH = –1.0 mA under VCC = 4.75 V. Its TTL/CMOS-compatible output levels (VOH ≥ 4.0 V, VOL ≤ 0.5 V) and low output impedance ensure reliable interfacing with legacy logic families without external buffers. This capability is confirmed in the DC Electrical Characteristics table.

What is the maximum operating temperature range for the DS1005M-75?

The DS1005M-75 is specified for commercial operation from 0°C to 70°C, as stated in the Absolute Maximum Ratings and DC Electrical Characteristics sections. While storage temperature extends to –55°C to +125°C, functional operation outside 0°C–70°C is not guaranteed. Extended temperature variants exist (e.g., DS1005M-75I), but the base DS1005M-75 is strictly commercial grade.

Does the DS1005M-75 require external decoupling capacitors?

Yes - the DS1005M-75 requires a 0.1 µF ceramic bypass capacitor placed as close as possible to the VCC (pin 5) and GND (pin 4) pins. This is critical to suppress switching noise and maintain delay stability, especially given its 40–70 mA active current draw and sensitivity to supply ripple. The manufacturer's application guidance and test conditions specify local decoupling as mandatory for compliant operation.