Analog Devices Inc./Maxim Integrated DS1007S-1/T&R

Overview

DS1007S-1/T&R from Dallas Semiconductor (now Maxim Integrated) is a 7-channel all-silicon delay line in 16-pin SOIC, providing fixed, factory-set delays of 3 ns, 4 ns, 5 ns, 6 ns, 9 ns, 13 ns, and 18 ns (t_PLH, rising edge), with ±2 ns tolerance at 25°C, V_CC = 5.0 V. It serves as a precision timing element in high-speed digital synchronization, clock skew management, and signal alignment circuits.

For engineers reviewing the DS1007S-1/T&R datasheet, DS1007S-1/T&R pinout, DS1007S-1/T&R application, or DS1007S-1/T&R equivalent, key selection criteria include channel count (7 independent buffered delays), delay accuracy (±2 ns), TTL/CMOS compatibility, and SOIC-16 surface-mount packaging for automated assembly.

Technical Context

The DS1007S-1/T&R implements seven independent, non-reconfigurable silicon-based delay paths-each with dedicated input and output pins-operating on a single 5.0 V ±5% supply. All outputs reproduce the input logic state after their respective fixed propagation delays, with leading-edge timing accuracy only for OUT1–OUT4 and both leading/trailing-edge accuracy for OUT5–OUT7.

It uses low-power CMOS technology, supports vapor-phase, IR, and wave soldering, and exhibits unidirectional delay drift across temperature/voltage variations-i.e., all outputs slow or speed up together under changing conditions-enabling predictable system-level timing margining.

Key Specifications

Pinout & Package

DS1007S-1/T&R is housed in a 16-pin SOIC (300-mil width), surface-mount package compliant with JEDEC MS-012. Pin 1 is marked by a notch or dot; device is auto-insertable and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1007S-1/T&R, DS1007D-1 offers identical timing performance but different mechanical integration, while MAX9921 trades channel count and simplicity for programmability-making DS1007S-1/T&R optimal for static, multi-channel deskew in volume SMT designs.

Availability

DS1007S-1/T&R is available at Aetrix Electronics and suitable for high-speed bus deskew, test equipment signal alignment, and digital clock distribution requiring stable component supply and long-term manufacturability.

Supply support for DS1007S-1/T&R 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 (a subsidiary of Analog Devices), specialized in precision timing, memory, and mixed-signal ICs for industrial and communications systems.

The DS1007 product line was designed to replace hybrid and ceramic delay lines with monolithic silicon solutions offering tighter tolerance, better reliability, and lower cost in fixed-timing applications.

FAQ

What is the delay accuracy specification for DS1007S-1/T&R across temperature?

The DS1007S-1/T&R specifies ±2 ns delay tolerance at 25°C. While full temperature-range accuracy is not explicitly guaranteed in the datasheet, delay variation over 0°C to +70°C remains monotonic and bounded-outputs shift together (unidirectionally) with temperature, enabling robust system-level timing margining. DS1007S-1/T&R does not specify worst-case deviation over full temp range, so design margins should account for observed drift trends.

Can DS1007S-1/T&R be used with 3.3 V logic systems?

No-DS1007S-1/T&R is specified only for 5.0 V ±5% operation (4.75 V to 5.25 V). Its input thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2.2 V) and output drive levels are optimized for 5 V TTL/CMOS compatibility. Using it with 3.3 V logic without level translation risks unreliable switching and violates absolute maximum ratings. DS1007S-1/T&R requires a dedicated 5 V supply rail.

Is DS1007S-1/T&R pin-compatible with other DS1007 variants like DS1007-2 or DS1007-3?

Yes-DS1007S-1/T&R shares identical SOIC-16 pinout and electrical interface with all DS1007 speed grades (e.g., DS1007-2, DS1007-3). Only the internal delay values differ; IN/OUT assignments, VCC, GND, and package dimensions are fully consistent. DS1007S-1/T&R may be substituted on the same PCB footprint when timing requirements align with its specific 3/4/5/6/9/13/18 ns delay set.

Does DS1007S-1/T&R support both rising- and falling-edge delays?

DS1007S-1/T&R guarantees timing accuracy only on the rising edge (t_PLH) for all outputs. The datasheet confirms leading-edge accuracy for OUT1–OUT4 and both leading/trailing-edge accuracy for OUT5–OUT7-but DS1007S-1/T&R's specific delay table (Table 1) lists t_PLH only, and no t_PHL values are provided. Therefore, DS1007S-1/T&R should be applied in rising-edge–triggered systems unless empirical validation confirms falling-edge behavior.

What is the maximum input frequency supported by DS1007S-1/T&R?

DS1007S-1/T&R does not specify a maximum operating frequency. Instead, it defines minimum input pulse width (t_WI) as 100% of the longest delay (i.e., ≥18 ns for DS1007S-1/T&R) and recommends ≥1 µs period in test conditions. For reliable operation, input signal period should exceed 2× the longest delay (≥36 ns), implying practical upper limit near 27 MHz. DS1007S-1/T&R is intended for periodic or burst-mode digital timing-not continuous high-frequency clock distribution.