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Analog Devices Inc./Maxim Integrated DS1077LZ-40
- Part No.:
- DS1077LZ-40
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1077LZ-40.pdf
- Description:
- IC OSC DUAL FX FREQ PROG 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,154
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Product details
Overview
DS1077LZ-40 from Maxim Integrated is a dual-output, nonvolatile, 2-wire programmable oscillator with fixed-frequency operation. It delivers synchronous OUT0 (reference) and OUT1 (main) outputs ranging from 4.87kHz to 40MHz, ±0.5% initial tolerance, ±1.25% variation over temperature/voltage, and operates from a single 2.7V–3.6V supply. Used in embedded timing control for microcontroller clocking and peripheral synchronization.
For engineers reviewing the DS1077LZ-40 datasheet, DS1077LZ-40 pinout, DS1077LZ-40 application, or DS1077LZ-40 equivalent, this page provides verified functional architecture, validated pin roles, confirmed EEPROM-programmable prescaler/divider settings, real-world jitter and power-down behavior, and direct alternative part comparisons for clock tree design and BOM optimization.
Technical Context
The DS1077LZ-40 integrates an internal master oscillator factory-trimmed to 40MHz, two independent M-dividers (P0 and P1, each selectable for ÷1/÷2/÷4/÷8), and a programmable N-divider (2–1025) on OUT1 path. Its 2-wire serial interface enables in-circuit frequency reprogramming with nonvolatile EEPROM storage of all register values.
Control logic supports synchronous output gating via CTRL0 (multifunction: MUX select, OUT0 enable, or power-down) and CTRL1 (OUT1 enable or power-down), with OR-connected shutdown capability. Power-up defaults are stored in EEPROM, and outputs stabilize within 1ms after power-on or enable assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 4.87kHz to 40.000MHz - covers low-speed peripherals and high-speed MCU clocks without external components |
| Initial Frequency Tolerance | ±0.5% - ensures accurate timing at power-up before calibration or trimming |
| Temp/Voltage Variation | ±1.25% - guarantees stable clock delivery across industrial -40°C to +85°C and 2.7V–3.6V supply range |
| Output Jitter (66MHz ref) | 50ps pk-pk (3σ) - meets low-jitter requirements for high-speed digital interfaces |
| Supply Current (40MHz) | 15mA @ -40°C to +85°C - enables efficient power budgeting in battery-sensitive or thermally constrained systems |
| Standby Current | 10µA - supports ultra-low-power sleep modes when both outputs are gated |
| Interface Protocol | 2-wire I²C-compatible (100kHz/400kHz) - allows reuse of existing system bus infrastructure with no additional protocol overhead |
Pinout & Package
DS1077LZ-40 is housed in an 8-pin 150mil SO package (JEDEC MS-012AA). All pins are electrically validated per Maxim's official datasheet Rev. 0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Main oscillator output | Delivers final programmed frequency (P1 ÷ N or P1 only if DIV1=1); drives primary system clock domain |
| OUT0 | Reference output | Provides secondary synchronized clock (P0 output); used for peripheral timing or clock domain bridging |
| VCC | Power-supply voltage | Single 2.7V–3.6V rail powers entire oscillator core, EEPROM, and interface logic |
| GND | Ground reference | Common return for analog/digital sections; requires local 0.01µF + 0.1µF ceramic decoupling |
| CTRL1 | OUT1 control input | Configurable as output enable or power-down; internally OR'd with CTRL0 for device-level shutdown |
| CTRL0 | OUT0 control input | Multifunction pin: selects MUX source, enables OUT0, or initiates power-down based on EN0/SEL0/PDN0 register bits |
| SDA | 2-wire serial data I/O | Open-drain bidirectional line for reading/writing MUX, DIV, and BUS registers; requires 5kΩ pull-up |
| SCL | 2-wire serial clock input | Master-generated clock synchronizing all register transfers; supports standard (100kHz) and fast (400kHz) modes |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous outputs | OUT0 and OUT1 share same master clock source and prescaler paths, eliminating inter-clock skew in multi-domain systems |
| Nonvolatile frequency storage | All P0, P1, N, and control register values persist across power cycles without external memory or boot-time reprogramming |
| On-the-fly frequency change | Registers updated via 2-wire interface while running; outputs remain glitch-free and phase-continuous during reconfiguration |
| Programmable output gating | CTRL0 and CTRL1 independently gate OUT0/OUT1 with smart low-to-Hi-Z transition, preventing metastability on downstream logic |
| Zero external components | Self-contained oscillator core, dividers, EEPROM, and interface require no crystals, caps, or resistors - reduces BOM count and board area |
Applications
| Microcontroller Clock Source | Peripheral Timing Reference |
|---|---|
Use Scenario: Providing main system clock to ARM Cortex-M or RISC-V MCU in industrial controller. IC Role / Device Role / Timing Role: Primary clock generator with 40MHz nominal output, configured via EEPROM to match CPU core and bus timing requirements. Use Value: Eliminates need for external crystal + load capacitors; enables field-upgradable clock frequencies without hardware change. | Use Scenario: Synchronizing UART, SPI, or I²C peripherals in a sensor node with shared timing domain. IC Role / Device Role / Timing Role: Reference output (OUT0) supplies stable, low-jitter clock to multiple peripherals operating at same or submultiple rate. Use Value: Reduces clock domain crossing complexity and eliminates individual crystal loads per peripheral. |
| Low-Power Sleep Mode Timing | Configurable System Clock Tree |
Use Scenario: Maintaining RTC or wake-up timer accuracy during deep-sleep mode in portable medical device. IC Role / Device Role / Timing Role: Power-down mode reduces current to 10µA while preserving frequency settings; OUT0 remains available for low-frequency timing. Use Value: Enables precise wake-up intervals without waking main MCU or consuming active-mode current. | Use Scenario: Supporting multiple clock domains (e.g., CPU, USB, display) in multimedia SoC-based gateway. IC Role / Device Role / Timing Role: Dual outputs deliver independent frequencies (e.g., 40MHz CPU clock + 12MHz USB clock) derived from same master oscillator. Use Value: Guarantees deterministic phase relationship between domains and simplifies EMI filtering via common fundamental frequency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1077LU-40 | Identical electrical specs and register map, but in 8-pin 118mil µSOP package - 30% smaller footprint, higher thermal resistance | Preferred for space-constrained PCBs where thermal margin allows; not drop-in compatible due to different pad layout | Select DS1077LU-40 only when board area is critical and re-layout is acceptable. |
| Si5351A-B-GM | 3-output, I²C-programmable clock generator with PLL-based architecture; wider frequency range (8kHz–200MHz), higher jitter (150ps), and no EEPROM - requires host MCU initialization | Suitable for multi-frequency systems needing >2 outputs or fractional synthesis; unsuitable for standalone/no-host operation | Choose Si5351A-B-GM when >2 clocks or fine-grained frequency resolution are required; avoid if EEPROM persistence or zero-host boot is mandatory. |
Compared with DS1077LZ-40, DS1077LU-40 offers identical functionality in a smaller package but demands PCB redesign, while Si5351A-B-GM adds output count and flexibility at the cost of EEPROM autonomy and higher jitter - making DS1077LZ-40 optimal for single-board, hostless, low-jitter dual-clock applications.
Availability
DS1077LZ-40 is available at Aetrix Electronics and suitable for industrial automation controllers, medical instrumentation, and embedded communications equipment requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for DS1077LZ-40 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, mixed-signal, and timing ICs for industrial, automotive, and communications markets.
The DS1077L product line delivers compact, EEPROM-based programmable oscillators targeting applications needing reliable, field-configurable clock sources without external components or host processor dependency.
FAQ
What is the default output frequency of DS1077LZ-40 at power-up?
The DS1077LZ-40 powers up with factory-programmed settings yielding 40.000MHz on OUT1 and the master clock (40MHz) on OUT0, as defined by default register values: DIV1=0, P1=1, P0=1, and N=0 (bypassed). These values are stored in nonvolatile EEPROM and require no external configuration.
Can DS1077LZ-40 operate without connecting the 2-wire interface pins?
Yes - DS1077LZ-40 functions as a standalone oscillator once programmed. SDA and SCL may be left unconnected in fixed-frequency applications; the device uses its EEPROM-stored settings to generate outputs immediately after power-up without host interaction.
How does power-down mode affect DS1077LZ-40 outputs and current draw?
In power-down mode (activated via CTRL0 or CTRL1), DS1077LZ-40 disables both OUT0 and OUT1 outputs, then shuts down internal oscillator and logic, reducing supply current to 10µA. Outputs return to active state within 1ms after control pin release, with full frequency stability achieved in ≤1ms.
What is the maximum allowable load capacitance for DS1077LZ-40 outputs?
DS1077LZ-40 specifies a load capacitance range of 15pF to 50pF for both OUT0 and OUT1. Driving loads outside this range may degrade duty cycle (40–60%), increase jitter, or cause frequency shift - especially above 20MHz where signal integrity becomes sensitive to trace capacitance and termination.
Does DS1077LZ-40 support I²C fast-mode operation?
Yes - DS1077LZ-40 fully supports I²C fast-mode operation at 400kHz, including tSU:DAT ≥300ns, tHD:DAT ≥0.9µs, and tLOW/tHIGH ≥0.6µs. It also maintains backward compatibility with standard-mode (100kHz) systems, ensuring interoperability across legacy and high-speed host controllers.
DS1077LZ-40 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconOscillator™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Oscillator, Fixed Frequency (Dual)
- Count:
- -
- Frequency:
- 4.87kHz ~ 40MHz
- Voltage - Supply:
- 2.7V ~ 3.6V
- Current - Supply:
- 15 mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
DS1077LZ-40 FAQ
1.How can I place an order for DS1077LZ-40 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1077LZ-40 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 DS1077LZ-40 reliable?
The price and inventory of DS1077LZ-40 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1077LZ-40 is usually 5 days.
3.What payment methods are accepted for DS1077LZ-40?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1077LZ-40 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1077LZ-40?
DS1077LZ-40 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1077LZ-40 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 DS1077LZ-40?
For technical support, including DS1077LZ-40 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1077LZ-40 requirements.
6.How does Aetrix verify that DS1077LZ-40 is sourced from the original manufacturer or authorized distributors?
All DS1077LZ-40 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 DS1077LZ-40 meets industry standards.
7.What is the process for return or replacement of DS1077LZ-40?
All DS1077LZ-40 units undergo pre-shipment inspection (PSI). If there is an issue with DS1077LZ-40, 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 DS1077LZ-40 part is unused and in its original packaging.
Return procedure for DS1077LZ-40:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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