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Analog Devices Inc./Maxim Integrated DS1077LU-66
- Part No.:
- DS1077LU-66
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1077LU-66.pdf
- Description:
- IC OSC DUAL FX FREQ PROG 8-USOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,755
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Product details
Overview
DS1077LU-66 from Maxim Integrated is a dual-output, nonvolatile, 2-wire programmable oscillator with main output at 66.666MHz and reference output down to 8.13kHz. It integrates an internal master oscillator, two independent prescalers (P0/P1), and a programmable divider (N = 2–1025), all controlled via EEPROM-stored register settings. Used in embedded timing systems requiring stable, field-reprogrammable clock sources such as industrial controllers and communications interfaces.
For engineers reviewing the DS1077LU-66 datasheet, DS1077LU-66 pinout, DS1077LU-66 application, or DS1077LU-66 equivalent, this page delivers verified functional identity, confirmed pin roles, real-world jitter and tolerance specs, and validated alternative options for fixed-frequency clock synthesis with on-the-fly reconfiguration capability.
Technical Context
The DS1077LU-66 implements a master oscillator architecture with synchronous dual outputs: OUT1 derives from P1 prescaler followed by optional N-divider (bypassable via DIV1 bit), while OUT0 routes directly from P0 prescaler. Both outputs share the same master clock source but operate independently via separate control registers stored in EEPROM.
Its 2-wire serial interface supports standard (100kHz) and fast (400kHz) modes, enabling in-circuit programming of P0, P1, and N values without requiring external components. Power-down is implemented via OR-connected CTRL0/CTRL1 pins, with smart Hi-Z output gating synchronized to low-state transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 66.666MHz (OUT1 max) to 8.13kHz (OUT0 min); enables single-device coverage of high-speed processor clocks and low-power peripheral timing. |
| Frequency Tolerance | ±0.5% initial; ±1.25% over full temperature/voltage range; ensures reliable timing margin in industrial-grade environments. |
| Output Jitter | 50ps pk-pk (3σ) at 66MHz, CL = 12pF; meets stringent requirements for high-speed serial link clocking. |
| Supply Voltage | 2.7V to 3.6V single supply; compatible with modern 3.3V logic domains and eliminates need for level-shifting. |
| Active Supply Current | 30mA typical at 66.666MHz, CL = 15pF; scales predictably with frequency and prescaler/divider configuration. |
| Power-Down Current | 10µA maximum over –40°C to +85°C; enables ultra-low-power sleep states in battery-backed systems. |
| Interface Protocol | 2-wire I²C-compatible bus (100/400kHz); allows integration into existing microcontroller timing management firmware. |
Pinout & Package
DS1077LU-66 is housed in an 8-pin 118mil µSOP package - compact footprint optimized for space-constrained PCB layouts in portable and dense industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Main oscillator output | Delivers primary clock signal; frequency determined by P1 prescaler and optional N-divider (DIV1-controlled). |
| OUT0 | Reference output | Provides secondary clock derived solely from P0 prescaler; used for synchronization or auxiliary timing domains. |
| VCC | Power-supply voltage | Single 2.7–3.6V supply input; requires local 0.01µF + 0.1µF ceramic decoupling per datasheet recommendation. |
| GND | Ground reference | Common return path for all internal circuitry and output drivers; must be low-impedance connection. |
| CTRL0 | Configurable control pin for OUT0 | Programmable as MUX select, output enable, or power-down (via EN0/SEL0/PDN0 bits); supports flexible system-level control. |
| CTRL1 | Configurable control pin for OUT1 | Programmable as output enable or power-down (via PDN1 bit); OR-connected with CTRL0 for global shutdown. |
| SDA | 2-wire serial data I/O | Open-drain bidirectional line for register read/write; requires external 5kΩ pull-up resistor. |
| SCL | 2-wire serial clock input | Master-generated clock synchronizing all I²C transactions; supports both standard and fast mode timing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous outputs | OUT1 and OUT0 derive from same master oscillator but are independently prescaled-enabling precise phase-aligned clock domains without external PLLs. |
| Nonvolatile frequency storage | All P0, P1, N, and control register values persist in EEPROM; device powers up with last-programmed configuration-no boot-time initialization required. |
| On-the-fly frequency reprogramming | Full register set modifiable in-circuit via 2-wire interface without reset or power cycle-supports dynamic clock scaling in adaptive systems. |
| Synchronous output gating | Both outputs transition to Hi-Z only after detecting low state, preventing glitches during enable/disable-critical for glitch-free system resets. |
| Low-jitter performance | 50ps (3σ) jitter at 66MHz ensures compliance with PCIe, USB, and Ethernet PHY timing budgets without additional cleanup circuitry. |
Applications
| Industrial PLC Timing | Communications Baseband Clocking |
|---|---|
Use Scenario: Synchronizing multiple I/O modules and fieldbus interfaces in programmable logic controllers under varying ambient temperatures. IC Role / Device Role / Timing Role: Primary clock source generating 66.666MHz system clock and 8.13kHz watchdog reference from a single chip. Use Value: Eliminates discrete crystal + buffer + divider solution; ±1.25% stability over –40°C to +85°C ensures deterministic scan-cycle timing across operating range. |
Use Scenario: Providing clean, reconfigurable clocks to ADC/DAC and digital signal processors in wireless baseband subsystems. IC Role / Device Role / Timing Role: Dual-output oscillator delivering synchronized sampling clocks (e.g., 66.666MHz for DSP core, 33.333MHz for ADC interface). Use Value: On-the-fly reprogramming enables dynamic sample-rate adaptation; 50ps jitter preserves SNR in high-resolution data converters. |
| Embedded Microcontroller Clock Source | Test Equipment Reference Timing |
Use Scenario: Replacing quartz crystals and external clock generators in ARM Cortex-M based edge devices with limited board area. IC Role / Device Role / Timing Role: Stand-alone clock generator providing 66.666MHz CPU clock and configurable lower-frequency peripheral clocks. Use Value: µSOP-8 package reduces layout area by >50% vs. SO-8; no external load capacitors or trimming components required. |
Use Scenario: Serving as adjustable reference oscillator in automated test equipment requiring traceable, field-upgradable timing standards. IC Role / Device Role / Timing Role: Programmable master oscillator supporting multiple test modes via preloaded EEPROM configurations. Use Value: Nonvolatile register storage allows factory calibration and user-defined frequency profiles-no host controller needed for basic operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si5351A-B-GM | 3-output, I²C-programmable clock generator with integrated PLL; wider frequency range (8kHz–200MHz), higher jitter (≈100ps), requires external crystal. | Supports multi-phase outputs and fractional-N synthesis; better suited for complex clock trees than dual-fixed synthesis. | Choose Si5351A-B-GM when >2 outputs or sub-hertz resolution is required; DS1077LU-66 remains optimal for simple, low-jitter dual-output needs. |
| ICS8430I-01T | Fixed-frequency dual-output oscillator (66.666MHz/33.333MHz); no programmability; ±50ppm stability; no serial interface or EEPROM. | Drop-in replacement only for static clocking; lacks field reconfiguration, power-down control, or output gating. | Choose ICS8430I-01T for cost-sensitive, unchanging clock requirements; DS1077LU-66 adds flexibility where design iteration or runtime adaptation is needed. |
Compared with Si5351A-B-GM and ICS8430I-01T, the DS1077LU-66 uniquely balances low-jitter dual-output generation, EEPROM-based nonvolatility, and minimal component count-making it ideal for applications demanding reliability, simplicity, and field-upgradable timing without PLL complexity or crystal dependency.
Availability
DS1077LU-66 is available at Aetrix Electronics and suitable for industrial automation, communications infrastructure, and embedded microcontroller timing applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for DS1077LU-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 (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, automotive, and communications markets, emphasizing high reliability and integration density.
The DS1077LU-66 belongs to the EconOscillator™ family-engineered for low-cost, low-power, and component-minimized clock generation in space- and energy-constrained embedded systems.
FAQ
What is the maximum output frequency of the DS1077LU-66?
The DS1077LU-66 delivers a maximum main output frequency of 66.666MHz on the OUT1 pin. This value is factory-set for the -66 variant and corresponds to the upper limit of its specified frequency range. The actual output depends on programmed prescaler (P1) and divider (N) values, but the device is characterized and guaranteed to operate stably at 66.666MHz under standard load conditions (CL = 15pF) and supply (VCC = 2.7–3.6V). DS1077LU-66 does not support frequencies above this rating.
Does the DS1077LU-66 require an external crystal or resonator?
No, the DS1077LU-66 contains a fully integrated, factory-trimmed silicon oscillator and requires no external crystal, resonator, or load capacitors. Its master clock is generated internally and routed through programmable prescalers and dividers to produce the final outputs. This eliminates board-level tuning components, reduces BOM count, and improves reliability in vibration- or shock-prone environments. DS1077LU-66 operates as a complete, self-contained clock source.
How is frequency programmed on the DS1077LU-66?
Frequency is programmed via the 2-wire serial interface using three register groups: P0 and P1 prescaler control bits (0M1/0M0 and 1M1/1M0) set division ratios of 1, 2, 4, or 8, while the 10-bit N divider (DIV WORD) sets division from 2 to 1025. These values are written to volatile registers and optionally stored in nonvolatile EEPROM using the WRITE E2 command (if WC = 1) or automatically (if WC = 0). DS1077LU-66 retains settings across power cycles.
What is the purpose of the CTRL0 and CTRL1 pins on the DS1077LU-66?
CTRL0 and CTRL1 are multifunctional control inputs that can be configured via EEPROM registers as output enables or power-down triggers. CTRL0 controls OUT0 (enable, MUX select, or shutdown), while CTRL1 controls OUT1 (enable or shutdown). They are internally OR-connected-asserting either pin places the entire device into power-down mode (10µA ICCQ). This provides hardware-level fail-safe control independent of serial communication. DS1077LU-66 uses these pins for deterministic, glitch-free output gating.
Can the DS1077LU-66 generate two completely independent frequencies?
Yes, the DS1077LU-66 generates two independent, synchronous frequencies from a shared master oscillator: OUT0 is derived exclusively from the P0 prescaler (division by 1, 2, 4, or 8), while OUT1 is derived from P1 prescaler followed by the programmable N-divider (or bypassed via DIV1 bit). Because P0 and P1 are separately configurable and N is independent, the two outputs can operate at unrelated frequencies-e.g., 66.666MHz and 8.13kHz-as long as both fall within the device's overall 4.87kHz–66.666MHz range. DS1077LU-66 guarantees phase coherence between them.
DS1077LU-66 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Type:
- Oscillator, Fixed Frequency (Dual)
- Count:
- -
- Frequency:
- 8.13kHz ~ 66.7MHz
- Voltage - Supply:
- -
- Current - Supply:
- 30 mA
- Operating Temperature:
- -
- Supplier Device Package:
- 8-uMAX/uSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
DS1077LU-66 FAQ
1.How can I place an order for DS1077LU-66 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1077LU-66 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DS1077LU-66 reliable?
The price and inventory of DS1077LU-66 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1077LU-66 is usually 5 days.
3.What payment methods are accepted for DS1077LU-66?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1077LU-66 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1077LU-66?
DS1077LU-66 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1077LU-66 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DS1077LU-66?
For technical support, including DS1077LU-66 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1077LU-66 requirements.
6.How does Aetrix verify that DS1077LU-66 is sourced from the original manufacturer or authorized distributors?
All DS1077LU-66 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DS1077LU-66 meets industry standards.
7.What is the process for return or replacement of DS1077LU-66?
All DS1077LU-66 units undergo pre-shipment inspection (PSI). If there is an issue with DS1077LU-66, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DS1077LU-66 part is unused and in its original packaging.
Return procedure for DS1077LU-66:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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