Analog Devices Inc./Maxim Integrated DS1075Z-166

Overview

DS1075Z-166 from Maxim Integrated is a programmable fixed-frequency oscillator IC with dual outputs, supporting user-configurable on-chip prescaler (÷1, ÷2, ÷4) and divider (N = 2–513), 0.5% initial frequency tolerance, and operation from 29.3 kHz to 100 MHz using internal oscillator, external clock, or crystal reference - deployed in industrial timing, microcontroller clocking, and programmable logic systems.

For engineers reviewing the DS1075Z-166 datasheet, DS1075Z-166 pinout, DS1075Z-166 application, or DS1075Z-166 equivalent, this page delivers verified functional identity, confirmed pin roles, validated package mapping (150-mil SOIC), real-world timing behavior under OE/PDN control, and two field-validated alternative oscillators for frequency-flexible embedded designs.

Technical Context

The DS1075Z-166 implements a master oscillator followed by a selectable prescaler and a 9-bit programmable divider, all configured via nonvolatile EEPROM registers. Its dual-mode reference selection (internal oscillator or external/crystal via OSCIN/XTAL) is controlled either at programming time or dynamically via the PDN/SELX pin when PDN bit = 0.

Output gating is synchronous and glitch-free: OE enables/disables OUT with phase-coherent pulse termination, while PDN/SELX triggers power-down (PDN=1) or real-time reference switching (PDN=0). OUT0 provides a buffered reference output unaffected by OE but disabled during power-down.

Key Specifications

Pinout & Package

DS1075Z-166 is housed in an 8-pin 150-mil SOIC package (JEDEC MS-012), with pin 1 marked by a notch or dot. All pins are CMOS-compatible and support 5 V operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar programmable oscillator applications.

Compared with Si5351A-B-GM and ICS843002AGI-01LFT, DS1075Z-166 uniquely combines factory-shippable default configuration, on-site EEPROM programming, synchronous OE gating, and dynamic reference switching - making it optimal for cost-sensitive, field-adaptable embedded timing where board area and component count are constrained.

Availability

DS1075Z-166 is available at Aetrix Electronics and suitable for industrial automation, programmable logic controller (PLC) timing, and microcontroller clocking applications requiring stable component supply, long-term lifecycle continuity, and consistent parametric performance across production batches.

Supply support for DS1075Z-166 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) is a semiconductor company specializing in precision analog, mixed-signal, and high-reliability timing solutions for industrial, automotive, and communications markets.

The DS1075 product line was designed as a low-cost, programmable EconOscillator for embedded systems needing flexible, component-free clock generation - targeting applications where traditional crystal+buffer or multiple fixed oscillators increase BOM cost and PCB area.

FAQ

What is the maximum output frequency supported by DS1075Z-166?

The DS1075Z-166 supports a maximum output frequency of 100 MHz, as confirmed by its datasheet's "FREQUENCY OPTIONS" table and AC Electrical Characteristics section. This limit applies regardless of whether the internal oscillator, external clock, or crystal reference is selected. The device achieves this using its on-chip prescaler (÷1, ÷2, ÷4) and 9-bit programmable divider (N = 2–513), with actual output determined by f_OUT = f_REF / (M × N) or f_REF / N depending on DIV1/MSEL configuration. DS1075Z-166 is rated for reliable operation up to this frequency under specified conditions (V_CC = 4.75–5.25 V, T_A = 0°C–70°C).

Does DS1075Z-166 require external components to operate?

No, DS1075Z-166 requires no external components for basic operation - it integrates a master oscillator, prescaler, divider, and EEPROM programming memory. A crystal may be connected between OSCIN and XTAL pins for crystal-reference mode, but this is optional; the internal oscillator or external clock input can be used instead. Decoupling capacitance (typically 0.1 µF) is recommended at VCC, but not strictly required per datasheet. DS1075Z-166 is explicitly described as a "fixed frequency oscillator requiring no external components for operation", distinguishing it from crystal oscillator modules that mandate load capacitors.

How is DS1075Z-166 programmed, and what interface does it use?

DS1075Z-166 is programmed using a 1-Wire™-compatible serial interface via its I/O (Pin 1) terminal. Programming mode is entered by applying a ~5 kΩ pull-up resistor from I/O to VCC before power-up, which triggers internal release of the pin and initiates the 1-Wire reset sequence. The bus master then issues 8-bit function commands (e.g., 01H to write DIV register, A2H to read MUX register) followed by nine LSB-first data bits. All register values - including prescaler (M), divider (N), E/I select, PDN bit, and EN0 - are stored nonvolatively in on-chip EEPROM. DS1075Z-166 retains its configuration across power cycles without external memory.

What is the function of the PDN/SELX pin on DS1075Z-166?

The PDN/SELX pin (Pin 6) on DS1075Z-166 serves a dual, user-selectable function determined by the PDN bit in the MUX register: when PDN = 1, it acts as an active-low power-down control that disables the oscillator and places both OUT and OUT0 in high-impedance states, reducing current to 0.8 µA; when PDN = 0, it functions as a dynamic reference selector (SELX) that switches between internal oscillator and external/crystal reference on-the-fly. The selection is glitch-free due to internal enabling sequencer logic. DS1075Z-166 uses this pin to eliminate need for external logic or firmware intervention during mode changes.

Can DS1075Z-166 generate two independent frequencies simultaneously?

No, DS1075Z-166 generates one primary output frequency at the I/O (OUT) pin, derived from the selected reference (internal/external/crystal) divided by M×N or N. However, it provides a second output - OUT0 - which delivers the un-divided master clock (MCLK) directly from the reference select multiplexer. While OUT0 is not independently programmable, it offers a buffered, phase-aligned copy of the reference signal (e.g., crystal frequency or internal oscillator) that remains active even when OE disables OUT. Thus, DS1075Z-166 supports dual-output timing - one divided, one undivided - but not two fully independent frequencies.