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Analog Devices Inc./Maxim Integrated DS1077LU-50
- Part No.:
- DS1077LU-50
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
DS1077LU-50.pdf
- Description:
- DS1077 ECONOSCILLATOR/DIVIDER
- Quantity:
- Payment:
- Shipping:
Inventory:4,626
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Product details
Overview
DS1077LU-50 from Maxim Integrated is a dual-output, nonvolatile, programmable fixed-frequency oscillator with 2-wire serial interface, delivering synchronous OUT0 (reference) and OUT1 (main) outputs ranging from 6.09kHz to 50.000MHz. It features ±0.5% initial frequency tolerance, ±1.25% variation over temperature and supply voltage, and operates from a single 2.7V–3.6V supply. Used in embedded timing control for microcontroller clocking, FPGA configuration, and industrial PLCs where stable, field-programmable clock sources are required.
For engineers reviewing the DS1077LU-50 datasheet, DS1077LU-50 pinout, DS1077LU-50 application, or DS1077LU-50 equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply support details specific to the DS1077LU-50 µSOP variant.
Technical Context
The DS1077LU-50 integrates an internal master oscillator factory-trimmed for 50MHz nominal operation, two independent prescalers (P0 and P1, each selectable for ÷1/÷2/÷4/÷8), and a programmable N-divider (2–1025) on OUT1. Its 2-wire serial interface supports both standard (100kHz) and fast-mode (400kHz) operation, enabling in-circuit frequency reprogramming with EEPROM storage.
Control logic allows independent power-down and output-enable functions via CTRL0 and CTRL1 pins, with OR-connected shutdown capability. Output gating is synchronous, and both outputs exhibit low jitter (50ps pk-pk at 66MHz) and 40–60% duty cycle across the full frequency range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 6.09kHz to 50.000MHz - covers UART baud clocks, MCU system clocks, and FPGA reference clocks without external components. |
| Initial Tolerance | ±0.5% - ensures accurate timing at power-up before temperature/voltage drift occurs. |
| Temp/Voltage Variation | ±1.25% - guarantees stable operation across -40°C to +85°C and 2.7V–3.6V supply range. |
| Supply Voltage | 2.7V–3.6V - compatible with modern 3.3V logic systems and battery-backed applications. |
| Active Supply Current | 20mA max (at 50MHz, 15pF load) - enables low-power timing in portable and energy-sensitive designs. |
| Power-Down Current | 10µA - reduces standby power by >99% when outputs are disabled via CTRL0/CTRL1. |
| Output Jitter | 50ps pk-pk (3σ, 66MHz) - meets setup/hold margin requirements for high-speed digital interfaces. |
Pinout & Package
DS1077LU-50 is housed in an 8-pin, 118mil µSOP package (JEDEC MO-187AA), optimized for space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Main oscillator output | Delivers primary clock signal; frequency set by P1 prescaler and optional N-divider (bypassable via DIV1 bit). |
| OUT0 | Reference output | Provides secondary synchronized clock; frequency determined solely by P0 prescaler (÷1/÷2/÷4/÷8). |
| VCC | Power supply | Single 2.7V–3.6V supply input; requires local 0.01µF + 0.1µF ceramic decoupling. |
| GND | Ground reference | Common return path for all internal circuitry and output drivers. |
| CTRL0 | Multi-function control pin | Configurable as MUX select, OUT0 enable, or power-down (via EN0/SEL0/PDN0 register bits). |
| CTRL1 | Multi-function control pin | Configurable as OUT1 enable or power-down (via PDN1 register bit); OR-connected with CTRL0 for device shutdown. |
| SDA | 2-wire serial data I/O | Open-drain bidirectional line for EEPROM programming; requires 5kΩ pull-up resistor. |
| SCL | 2-wire serial clock input | Master-generated clock synchronizing all register reads/writes; supports 100kHz/400kHz modes. |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous outputs | OUT0 and OUT1 share same master clock source and prescaler architecture, ensuring deterministic phase relationship for multi-clock domain synchronization. |
| Nonvolatile frequency settings | EEPROM stores P0, P1, and N values; retains configuration across power cycles without external memory or boot-time initialization. |
| On-the-fly frequency reprogramming | Full register update via 2-wire interface while powered - enables dynamic clock scaling in real-time firmware-controlled systems. |
| Synchronous output gating | Both outputs transition to Hi-Z only at logic-low crossing, eliminating glitches during enable/disable transitions. |
| No external components | Self-contained oscillator core eliminates need for crystals, capacitors, or resistors - reduces BOM count and layout complexity. |
Applications
| Microcontroller Clock Source | FPGA Configuration Timing |
|---|---|
Use Scenario: Providing main system clock to ARM Cortex-M or RISC-V microcontrollers in industrial gateways. IC Role / Device Role / Timing Role: Primary clock generator with programmable frequency to match CPU core and peripheral bus requirements. Use Value: Eliminates crystal + load capacitor placement; enables firmware-tuned clock rates for power/performance trade-offs. | Use Scenario: Supplying configuration clock and user logic clock to Xilinx Artix-7 or Intel Cyclone V FPGAs. IC Role / Device Role / Timing Role: Dual-output timing source delivering synchronized CONFIG_CLK and USER_CLK signals. Use Value: Guarantees phase-aligned clocks for configuration integrity and deterministic logic timing without skew compensation. |
| Programmable Serial Interface Clock | Industrial PLC Timing Module |
Use Scenario: Generating precise baud-rate clocks for RS-485 transceivers in motor drive controllers. IC Role / Device Role / Timing Role: Reference clock source for UART dividers, supporting custom bit rates (e.g., 1.8432MHz → 115.2kbps). Use Value: Enables exact integer division for zero-error baud generation across multiple communication ports. | Use Scenario: Timing backbone for cyclic executive scheduling and I/O scan in DIN-rail mounted PLCs. IC Role / Device Role / Timing Role: Stable, field-reprogrammable clock source tolerant of wide temperature and voltage variations. Use Value: Maintains deterministic scan cycle timing under harsh factory conditions (-40°C to +85°C, brownout-prone supplies). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar programmable oscillator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1077LZ-50 | Same silicon die and electrical specs, but packaged in 8-pin 150mil SO instead of µSOP. | Requires larger PCB footprint; better thermal dissipation and hand-solderability. | Select DS1077LZ-50 for prototyping, manual assembly, or higher-power thermal environments. |
| Si5351A-B-GM | 3-output, I²C-programmable clock generator with fractional-N PLL; wider frequency range (8kHz–160MHz) but higher supply current (25mA typical). | Supports multiple independent frequencies and spread-spectrum modulation; not drop-in compatible. | Choose Si5351A-B-GM when multi-frequency synthesis or jitter reduction below 50ps is required. |
Compared with DS1077LZ-50, the DS1077LU-50 saves board area with its 118mil µSOP; compared with Si5351A-B-GM, it offers lower power, simpler register map, and guaranteed sub-1% stability without PLL loop tuning - ideal for cost- and space-sensitive fixed-frequency applications.
Availability
DS1077LU-50 is available at Aetrix Electronics and suitable for industrial automation, embedded computing, and communications equipment requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance.
Supply support for DS1077LU-50 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 power management ICs for industrial, automotive, and communications markets.
The DS1077L product line delivers compact, nonvolatile, programmable oscillators targeting space-constrained embedded systems needing reliable, field-configurable timing without external crystals or trimming components.
FAQ
What is the maximum output frequency of the DS1077LU-50?
The DS1077LU-50 supports a maximum output frequency of 50.000MHz on both OUT0 and OUT1 outputs. This upper limit is defined by the -50 frequency option variant and corresponds to the master oscillator's nominal frequency. Frequencies above 50MHz (e.g., 66.666MHz) require the DS1077LU-66 variant - the DS1077LU-50 cannot be configured beyond its rated 50MHz maximum.
Does the DS1077LU-50 require external passive components to operate?
No, the DS1077LU-50 requires no external passive components for basic oscillator operation. Its internal master oscillator, prescalers, and divider are fully self-contained. Only two external 0.01µF and 0.1µF ceramic decoupling capacitors on VCC/GND are recommended for optimal noise immunity - no crystal, load capacitors, or pull-up resistors are needed for core functionality.
How is frequency programmed on the DS1077LU-50?
Frequency on the DS1077LU-50 is programmed via its 2-wire serial interface using three register groups: MUX (sets P0 and P1 prescaler values), DIV (sets N-divider value 2–1025), and BUS (device address). Values are written to volatile registers first, then stored permanently in EEPROM either automatically (WC=0) or explicitly via WRITE E2 command (WC=1).
Can the DS1077LU-50 generate two different frequencies simultaneously?
Yes, the DS1077LU-50 generates two independent, synchronous frequencies: OUT0 is derived solely from the P0 prescaler (÷1/÷2/÷4/÷8 of master clock), while OUT1 is derived from P1 prescaler optionally followed by the N-divider (2–1025). For example, with a 50MHz master clock, OUT0 can be 12.5MHz (÷4) while OUT1 is 1MHz (÷50), both phase-locked to the same source.
What is the power-down behavior of the DS1077LU-50?
When power-down is asserted via CTRL0 or CTRL1 (with PDN0=1 or PDN1=1), the DS1077LU-50 disables both outputs (driving them Hi-Z), halts internal clock generation, and reduces supply current to ≤10µA. Outputs remain disabled until power-down signal is removed and internal stabilization completes (~1ms). The device retains all register and EEPROM settings during power-down.
DS1077LU-50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconOscillator™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Oscillator, Fixed Frequency (Dual)
- Count:
- -
- Frequency:
- 6.09kHz ~ 50MHz
- Voltage - Supply:
- -
- Current - Supply:
- 20 mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
DS1077LU-50 FAQ
1.How can I place an order for DS1077LU-50 through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1077LU-50 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-50 reliable?
The price and inventory of DS1077LU-50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1077LU-50 is usually 5 days.
3.What payment methods are accepted for DS1077LU-50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1077LU-50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1077LU-50?
DS1077LU-50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1077LU-50 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-50?
For technical support, including DS1077LU-50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1077LU-50 requirements.
6.How does Aetrix verify that DS1077LU-50 is sourced from the original manufacturer or authorized distributors?
All DS1077LU-50 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-50 meets industry standards.
7.What is the process for return or replacement of DS1077LU-50?
All DS1077LU-50 units undergo pre-shipment inspection (PSI). If there is an issue with DS1077LU-50, 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-50 part is unused and in its original packaging.
Return procedure for DS1077LU-50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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