Analog Devices Inc./Maxim Integrated DS1100M-40+

Overview

DS1100M-40+ from Maxim Integrated is a 5-tap silicon delay line IC providing fixed, equally spaced delays of 8ns, 16ns, 24ns, 32ns, and 40ns at each tap, operating at 5V with ±4ns delay tolerance over -40°C to +85°C, and capable of driving up to 10 LS-TTL loads per tap - used in digital timing alignment, clock skew correction, and pulse-width adjustment circuits.

For engineers reviewing the DS1100M-40+ datasheet, DS1100M-40+ pinout, DS1100M-40+ application, or DS1100M-40+ equivalent, key selection considerations include tap delay precision across temperature, TTL/CMOS compatibility, SO-8 vs. µMAX-8 package options, and industrial-grade reliability for embedded control and test instrumentation.

Technical Context

The DS1100M-40+ implements an all-silicon delay architecture with five discrete, monotonic output taps - all delays scale uniformly with voltage and temperature, ensuring consistent inter-tap spacing. It reproduces both leading and trailing edges with equal accuracy, measured at 1.5V thresholds.

Designed as a drop-in replacement for hybrid DS1000-series delay lines, it operates exclusively from a single 5V supply (4.75V–5.25V), draws ≤50mA active current, and supports vapor-phase, IR, and wave soldering without derating - validated for industrial temperature range (-40°C to +85°C).

Key Specifications

Pinout & Package

DS1100M-40+ is supplied in an 8-pin µMAX® package (U8+1 footprint, 3mm × 3mm, 0.65mm pitch), pin-compatible with industry-standard SO-8 but with reduced PCB area. The device uses a standard 8-pin layout optimized for high-density timing applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1100Z-40+, the DS1100M-40+ saves 60% board area while maintaining identical timing performance; compared with DS1023-40+, it provides two additional taps with guaranteed equal spacing - critical for linear time interpolation in calibration systems.

Availability

DS1100M-40+ is available at Aetrix Electronics and suitable for digital test equipment, industrial PLC timing, communications interface alignment, and legacy system interfacing requiring stable component supply and long-term lifecycle support.

Supply support for DS1100M-40+ 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 industrial, automotive, and communications applications, with emphasis on reliability and integration.

The DS1100M-40+ belongs to Maxim's economy timing element family - engineered to replace hybrid delay lines with monolithic silicon solutions offering superior stability, smaller footprint, and RoHS compliance.

FAQ

What is the nominal delay value for each tap of the DS1100M-40+?

The DS1100M-40+ provides five equally spaced delays: TAP 1 = 8ns, TAP 2 = 16ns, TAP 3 = 24ns, TAP 4 = 32ns, and TAP 5 = 40ns - all referenced to the 1.5V switching threshold on both rising and falling edges. These values are specified at +25°C and 5V, with ±4ns tolerance over the full -40°C to +85°C industrial range. The DS1100M-40+ maintains strict monotonicity: if one tap slows, all slow proportionally.

Is the DS1100M-40+ pin-compatible with the DS1100Z-40+?

No - the DS1100M-40+ uses an 8-pin µMAX® package (U8+1, 3mm × 3mm), while the DS1100Z-40+ uses an 8-pin SO-8 package (S8+4, 150-mil width). Pin functions are identical (IN, TAP1–TAP5, VCC, GND), but physical layout and land patterns differ. The DS1100M-40+ cannot be substituted into an SO-8 footprint without PCB redesign. Both share the same DS1100M-40+ electrical behavior and timing specs.

Does the DS1100M-40+ support 3.3V operation?

No - the DS1100M-40+ is specified only for 5V operation (4.75V to 5.25V). Its input thresholds (VIH ≥2.2V, VIL ≤0.8V) and output drive strength are optimized for 5V TTL/CMOS logic families. Applying 3.3V to VCC violates the Absolute Maximum Rating and will result in undefined timing behavior and potential damage. For 3.3V systems, consider level-shifting the input/output signals or selecting a dedicated low-voltage delay line.

How many LS-TTL loads can each tap of the DS1100M-40+ drive?

Each tap of the DS1100M-40+ can drive up to 10 LS-TTL loads, as confirmed by the datasheet's DC Electrical Characteristics table (IOL = 12mA, IOH = -1mA at VCC = min). This assumes standard 74LS input characteristics (IIL = -0.4mA, IIH = 20μA). Driving more than 10 loads risks violating VOL/V OH specifications and degrading delay accuracy due to capacitive loading. For heavier loads, add a 74ACT or 74LVC buffer per tap.

What does the "M" in DS1100M-40+ signify?

The "M" in DS1100M-40+ denotes the µMAX® package variant - specifically the 8-pin U8+1 outline (3mm × 3mm, 0.65mm pitch). This distinguishes it from the SO-8 version (DS1100Z-40+). The "+" suffix confirms RoHS-compliant, lead(Pb)-free construction. All DS1100M-40+ units are rated for the industrial temperature range (-40°C to +85°C) and undergo the same electrical testing as the Z-version.