Analog Devices Inc./Maxim Integrated DS1077Z-66+

Overview

DS1077Z-66+ from Maxim Integrated (now Analog Devices) is a dual-output, nonvolatile, programmable fixed-frequency oscillator with 2-wire serial interface. It delivers synchronous outputs of 66.666MHz (OUT1) and user-selectable reference frequencies down to 8.1kHz (OUT0), ±0.5% initial tolerance and ±0.5% variation over +25°C to +70°C, operating from a single 5V supply with no external components.

For engineers reviewing the DS1077Z-66+ datasheet, DS1077Z-66+ pinout, DS1077Z-66+ application, or DS1077Z-66+ equivalent, this page provides verified technical context on its dual-output prescaler/divider architecture, EEPROM-stored frequency settings, power-down control via CTRL0/CTRL1, and compatibility with standard/fast-mode I²C buses up to 400kHz.

Technical Context

The DS1077Z-66+ integrates a factory-trimmed internal master oscillator (66.666MHz nominal), two independent programmable prescalers (P0 and P1, each selectable for ÷1/÷2/÷4/÷8), and a 10-bit programmable divider (N = 2–1025) on OUT1. The OUT0 path bypasses the N-divider and routes directly from P0's output or the master clock via a MUX controlled by CTRL0.

Its 2-wire serial interface supports both standard (100kHz) and fast-mode (400kHz) operation, with slave address 0xB0–0xB7 (A2–A0 configurable), automatic or manual EEPROM write control (WC bit), and register-level access to DIV, MUX, and BUS words - all stored nonvolatily in on-chip EEPROM.

Key Specifications

Pinout & Package

DS1077Z-66+ is housed in an 8-pin 150mil SOIC package (Z suffix), with exposed pad not present and lead finish matte tin.

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, DS1077Z-66+ uniquely balances single-supply 5V operation, EEPROM-retained dual-output programmability, zero external components, and µA-level power-down - making it optimal for cost-sensitive, space-constrained embedded designs needing field-upgradable timing.

Availability

DS1077Z-66+ is available at Aetrix Electronics and suitable for communications infrastructure, industrial automation, medical imaging, and test equipment requiring stable component supply with guaranteed long-term availability.

Supply support for DS1077Z-66+ 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 (acquired by Analog Devices in 2021) is a leader in precision analog, mixed-signal, and high-reliability semiconductor solutions for industrial, communications, and computing markets.

The DS1077 series belongs to Maxim's EconOscillator™ family - designed specifically for applications demanding programmable, low-jitter, dual-output clock generation with minimal board footprint and zero external components.

FAQ

What is the maximum output frequency supported by DS1077Z-66+?

The DS1077Z-66+ supports a maximum output frequency of 66.666MHz on OUT1, as defined by its -66 frequency option. This is the factory-trimmed master oscillator frequency; OUT0 can be derived at lower frequencies via P0 prescaling (÷1/÷2/÷4/÷8), down to 8.1kHz. The device does not support frequencies above 66.666MHz - unlike the DS1077Z-133 variant which operates up to 133.333MHz. DS1077Z-66+ maintains ±0.5% accuracy across its specified range.

Does DS1077Z-66+ require an external crystal or resonator?

No, DS1077Z-66+ does not require any external crystal, resonator, or load capacitors. It contains a fully integrated, factory-trimmed silicon-based oscillator circuit that delivers stable 66.666MHz operation from power-up. This eliminates BOM cost, PCB area, and layout sensitivity associated with external timing components - a key advantage over crystal-based clock generators. DS1077Z-66+ achieves ±0.5% frequency accuracy over temperature using on-die trimming and EEPROM compensation.

How is frequency programming performed on DS1077Z-66+?

Frequency programming on DS1077Z-66+ is performed via its 2-wire (I²C-compatible) serial interface using dedicated command codes: Access DIV [01] writes the 10-bit N-divider value (2–1025), Access MUX [02] configures P0/P1 prescaler selection bits (0M1/0M0/1M1/1M0), and Write E2 [3F] commits settings to EEPROM. All registers default to factory values on power-up and retain settings nonvolatily. DS1077Z-66+ supports both standard (100kHz) and fast-mode (400kHz) I²C timing, with slave address determined by A2–A0 bits (default 0xB0).

Can DS1077Z-66+ generate two independent frequencies simultaneously?

Yes, DS1077Z-66+ generates two synchronous but independently programmable frequencies: OUT1 (main output) is set by P1 prescaling and optional N-divider (range: 66.666MHz ÷ P1 ÷ N), while OUT0 (reference output) is set solely by P0 prescaling (66.666MHz ÷ P0), with optional MUX selection between master clock and P0 output. Both outputs derive from the same master oscillator, ensuring deterministic phase relationship and eliminating inter-channel drift - critical for coherent sampling and clock domain crossing in DS1077Z-66+ applications.

What power management features does DS1077Z-66+ support?

DS1077Z-66+ supports three-tiered power management: (1) Full device power-down (2–5µA) asserted via CTRL0 (PDN0=1) or CTRL1 (PDN1=1), (2) Individual output disable via EN0/EN1 bits - placing OUT0 or OUT1 in Hi-Z without stopping the oscillator, and (3) Dynamic current reduction by configuring unused outputs to highest prescale ratio (e.g., ÷8). Power-down mode halts all outputs and core oscillator; recovery time is ≤1ms. These features are controlled entirely through I²C-accessible registers and persist across power cycles due to EEPROM storage.