Analog Devices Inc./Maxim Integrated DS1075Z-66N

Overview

DS1075Z-66N from Maxim Integrated is a user-programmable fixed-frequency oscillator IC with dual outputs, delivering 66.667 MHz from internal oscillator or external reference, ±0.5% initial frequency tolerance, 1% variation over temperature and supply voltage, and synchronous output enable functionality - used in embedded timing control, FPGA clocking, and industrial microcontroller systems.

For engineers reviewing the DS1075Z-66N datasheet, DS1075Z-66N pinout, DS1075Z-66N application, or DS1075Z-66N equivalent, key selection considerations include programmable prescaler (÷1, ÷2, ÷4), on-chip nonvolatile divider (N = 2–513), power-down mode current (0.8 µA), 5 V single-supply operation, and glitch-free reference switching between internal oscillator and external crystal/clock.

Technical Context

The DS1075Z-66N implements a master oscillator followed by a user-selectable prescaler (÷1, ÷2, ÷4) and a 9-bit programmable divider (N = 2–513), enabling precise output frequencies from ~29.3 kHz to 66.667 MHz. Its architecture supports three reference sources: internal oscillator, external clock input (≤50 MHz), or crystal (≤25 MHz).

It features two independent outputs: IN/OUT (main programmable output) and OUT0 (reference output, unaffected by OE but disabled during power-down). Mode selection (power-down vs. reference select) and divider configuration are stored in nonvolatile EEPROM and loaded at power-on reset after a 256-cycle stabilization delay.

Key Specifications

Pinout & Package

DS1075Z-66N is housed in a 150-mil SOIC-8 package (8-pin surface-mount), optimized for compact PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS1075Z-66N, DS1075M-66 offers identical timing performance in through-hole format, while DS1085L-66 delivers measurable improvements in thermal stability and jitter - making it preferable for automotive-adjacent or high-reliability deployments despite higher unit cost and firmware adaptation effort.

Availability

DS1075Z-66N is available at Aetrix Electronics and suitable for industrial automation, FPGA development, and embedded microcontroller timing applications requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.

Supply support for DS1075Z-66N 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, communications, and computing markets.

The DS1075Z-66N belongs to the EconOscillator™ family - designed to replace discrete crystal oscillators and buffer circuits with a single, field-programmable IC that reduces bill-of-materials count and improves timing system robustness.

FAQ

What is the factory-default output frequency of the DS1075Z-66N?

The DS1075Z-66N ships from the factory configured for half its maximum rated frequency: 33.333 MHz (66.667 MHz ÷ 2). This default uses the internal oscillator with MSEL = 1 (prescaler bypassed) and N = 0x000 (divider = 2), per the default MUX and DIV register values specified in the datasheet. Users can reprogram DS1075Z-66N to deliver the full 66.667 MHz or any other supported frequency within its 29.3 kHz–100 MHz range.

Can the DS1075Z-66N operate with an external crystal, and what is the maximum crystal frequency?

Yes, the DS1075Z-66N supports external crystal operation via the XTAL and OSCIN pins. The maximum crystal frequency is 25 MHz, as specified in the AC Electrical Characteristics table. When using a crystal, it must be connected between XTAL and OSCIN in parallel-resonant configuration; XTAL is left unconnected if crystal mode is not used. The DS1075Z-66N's internal oscillator remains disabled in this mode unless explicitly selected via the E/I bit or SELX pin.

How does the power-down mode of the DS1075Z-66N differ from output disable via OE?

Power-down mode (activated by pulling PDN/SELX low when PDN bit = 1) fully disables the internal oscillator, OSCIN buffer, and all output drivers, reducing supply current to 0.8 µA. In contrast, OE only gates the IN/OUT output synchronously while leaving the oscillator and internal counters running. DS1075Z-66N resumes full operation after power-down with a 256-cycle stabilization delay, whereas OE release restores output within ≤2 MCLK cycles - making OE ideal for dynamic clock gating and PDN better suited for deep sleep states.

Is the DS1075Z-66N pin-compatible with other DS1075 variants like DS1075Z-80 or DS1075Z-100?

Yes, all DS1075Z-x variants share identical 150-mil SOIC-8 pinout, register map, and functional interface. The suffix (e.g., -66, -80, -100) indicates factory-programmed maximum output frequency capability, but the underlying silicon is the same. A DS1075Z-66N can be reprogrammed to generate frequencies up to 100 MHz if its internal oscillator supports it - though the -66N variant is characterized and guaranteed only up to 66.667 MHz per datasheet limits.

What programming interface does the DS1075Z-66N use, and is external hardware required?

The DS1075Z-66N uses a 1-Wire™-compatible serial interface accessed via the IN/OUT pin during power-up with a ~5 kΩ pull-up resistor. Programming requires a bus master (e.g., microcontroller GPIO or dedicated 1-Wire host) to issue commands like Write MUX Register [02H] and Write DIV Register [01H]. No dedicated programmer is needed - the DS1075Z-66N's nonvolatile EEPROM retains settings across power cycles, and evaluation boards (DS1075K) are available to simplify initial configuration.