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Analog Devices Inc./Maxim Integrated DS1077U-133+
- Part No.:
- DS1077U-133+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Programmable Timers and Oscillators
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
DS1077U-133+.pdf
- Description:
- IC OSC DUAL FX FREQ PROG 8USOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,537
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Product details
Overview
DS1077U-133+ from Maxim Integrated (now Analog Devices) is a dual-output, nonvolatile, programmable fixed-frequency oscillator with 2-wire serial interface. It delivers synchronous OUT0 (reference) and OUT1 (main) outputs ranging from 8.1kHz to 133MHz, ±0.5% initial tolerance and ±0.5% variation over +25°C to +70°C, operating from a single 5V supply with no external components - used in FPGA clocking, microcontroller timing, and digital signal processing systems.
For engineers reviewing the DS1077U-133+ datasheet, DS1077U-133+ pinout, DS1077U-133+ application, or DS1077U-133+ equivalent, key selection considerations include its dual-synchronous output architecture, EEPROM-stored frequency settings, on-the-fly reprogramming capability via I²C, and µSOP-8 package compatibility with space-constrained embedded timing designs.
Technical Context
The DS1077U-133+ integrates a factory-trimmed internal master oscillator feeding two independent prescalers (P0 and P1), each selectable for division by 1, 2, 4, or 8, plus a programmable 10-bit divider (N = 2–1025) on the P1 path. Its control logic supports simultaneous OUT0/OUT1 gating, power-down via CTRL0/CTRL1, and synchronous output enable with low-jitter (<30ps pk-pk at 133MHz) performance.
Configuration is stored in nonvolatile EEPROM and accessed via a bidirectional 2-wire (I²C-compatible) interface supporting both standard (100kHz) and fast mode (400kHz), with slave address configurable via A2–A0 bits and automatic or manual EEPROM write control (WC bit).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency Range | 8.1kHz to 133MHz - covers PCIe reference, USB 2.0, Ethernet PHY, and high-speed MCU clocks |
| Frequency Tolerance | ±0.5% initial and ±0.5% over +25°C to +70°C - enables stable timing without external calibration |
| Supply Voltage | 4.75V to 5.25V - compatible with standard 5V logic rails and tolerant of typical board-level ripple |
| Active Supply Current | 50mA max at 133MHz with both outputs active - scales with frequency and divider settings per datasheet curves |
| Power-Down Current | 2µA to 5µA - allows ultra-low-power sleep states in battery-backed or energy-sensitive systems |
| Output Jitter | 30ps pk-pk (3σ) at 133MHz - meets jitter requirements for high-speed SerDes and ADC sampling clocks |
| I²C Interface Speed | Up to 400kHz - supports rapid in-system reconfiguration without requiring dedicated programming hardware |
Pinout & Package
DS1077U-133+ uses an 8-pin 118mil µSOP package (JEDEC MO-187AA), optimized for compact PCB layouts and automated assembly. Pin functions are electrically validated and match Maxim's official pinout diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 | Main oscillator output | Delivers final programmed frequency (P1 ÷ N or P1 only if DIV1=1); CMOS-compatible, 40–60% duty cycle |
| OUT0 | Reference output | Provides prescaled master clock (P0 output); used for system synchronization or feedback paths |
| VDD | Power supply | 5V nominal input; requires local 0.01µF + 0.1µF ceramic decoupling per datasheet layout guidance |
| GND | Ground reference | Common return for all analog/digital circuitry; must be low-impedance connection to minimize noise coupling |
| SCL | I²C clock input | Accepts 100kHz/400kHz clock; open-drain with external pull-up; defines timing for all serial transactions |
| SDA | I²C data I/O | Bidirectional open-drain line; requires 5kΩ pull-up; carries register reads/writes and device addressing |
| CTRL0 | Multifunction control | Configurable as MUX select, OUT0 enable, or power-down (via EN0/SEL0/PDN0 register bits) |
| CTRL1 | Multifunction control | Configurable as OUT1 enable or power-down (via PDN1 register bit); OR'd with CTRL0 for global shutdown |
Key Features
| Feature | Design Value |
|---|---|
| Dual synchronous outputs | Enables clock domain separation - e.g., core logic on OUT1, peripherals on OUT0 - with deterministic phase relationship |
| Nonvolatile frequency storage | EEPROM retains P0/P1/N/CTRL settings across power cycles; eliminates boot-time configuration overhead |
| On-the-fly reprogramming | Allows dynamic frequency switching during operation (e.g., CPU DVFS, adaptive sampling rates) without reset or interrupt |
| Synchronous output gating | Both outputs transition cleanly to Hi-Z on power-down or enable deassertion - prevents bus contention in multi-clock systems |
| Single-supply 5V operation | Eliminates need for auxiliary voltage rails or level shifters; simplifies power architecture and reduces BOM count |
Applications
| Communications Baseband Timing | FPGA Clock Synthesis |
|---|---|
Use Scenario: Providing synchronized clock signals to ADC/DAC, DSP, and RF front-end ICs in wireless infrastructure equipment. IC Role / Device Role / Timing Role: DS1077U-133+ serves as the primary clock source generating matched 133.333MHz and subharmonic reference frequencies for data converters and baseband processors. Use Value: Dual-output synchronization ensures deterministic inter-channel skew; ±0.5% stability maintains EVM compliance across temperature in LTE/5G transceivers. | Use Scenario: Delivering precise, reconfigurable clocks to Xilinx or Intel FPGAs for high-speed I/O interfaces (e.g., DDR3/4, PCIe Gen2/3). IC Role / Device Role / Timing Role: DS1077U-133+ acts as a flexible clock generator, supplying main fabric clock (OUT1) and transceiver reference (OUT0) with independent prescaling. Use Value: In-system I²C reprogramming allows runtime clock adjustment for different IP blocks or protocol modes without FPGA reconfiguration. |
| Industrial PLC Timing | Embedded Microcontroller Clocking |
Use Scenario: Generating robust timing for real-time control loops, encoder interfaces, and fieldbus communication (e.g., CAN, Profibus) in factory automation controllers. IC Role / Device Role / Timing Role: DS1077U-133+ provides a stable, low-jitter master clock (OUT1) and isolated reference (OUT0) for timer peripherals and communication peripherals. Use Value: Power-down capability via CTRL0/CTRL1 enables deterministic low-power states during idle cycles; ±0.5% temp stability ensures loop timing integrity over wide ambient ranges. | Use Scenario: Supplying accurate system clocks to ARM Cortex-M or RISC-V microcontrollers in medical devices, test equipment, and smart sensors. IC Role / Device Role / Timing Role: DS1077U-133+ replaces crystal + PLL combinations by delivering factory-programmed or user-tuned frequencies directly to MCU clock inputs. Use Value: Eliminates external capacitors and layout sensitivity; EEPROM storage avoids bootloader-based clock initialization delays. |
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 fractional PLL; wider frequency range (8kHz–200MHz); requires external crystal | Supports more complex multi-frequency synthesis but adds BOM cost and layout complexity | Choose Si5351A-B-GM when >2 outputs or sub-ppm stability with crystal reference are required |
| ICS8430AM-01LFT | Dual-output LVDS clock generator; fixed-frequency (133.333MHz); no I²C interface; ±50ppm stability | Lacks programmability and nonvolatility; suited for static clock trees only | Choose ICS8430AM-01LFT where simplicity, low jitter, and LVDS signaling outweigh flexibility needs |
Compared with Si5351A-B-GM and ICS8430AM-01LFT, DS1077U-133+ uniquely balances dual-CMOS-output programmability, EEPROM retention, and zero-external-component operation in a µSOP-8 footprint - ideal for cost-sensitive, space-constrained designs needing moderate stability and in-field reconfiguration.
Availability
DS1077U-133+ is available at Aetrix Electronics and suitable for communications infrastructure, FPGA-based prototyping, industrial PLCs, embedded microcontroller timing, and test equipment requiring stable component supply and long-term design continuity.
Supply support for DS1077U-133+ 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 semiconductor company specializing in precision analog, mixed-signal, and timing solutions for industrial, communications, and computing markets.
The DS1077U-133+ belongs to Maxim's EconOscillator™ family - designed specifically for applications demanding programmable, low-cost, space-efficient clock generation without external crystals or passive components.
FAQ
What is the maximum output frequency supported by the DS1077U-133+?
The DS1077U-133+ supports a maximum output frequency of 133MHz on OUT1, matching its part-number-specified 133.333MHz standard option. This is achieved when the internal master oscillator runs at 133.333MHz and the P1 prescaler is set to divide-by-1 with DIV1=1 (bypassing the N-divider). The datasheet confirms this value under AC Electrical Characteristics as fOUT(max) = 133MHz.
Does the DS1077U-133+ require an external crystal or resonator?
No, the DS1077U-133+ does not require any external crystal, resonator, or load capacitors. It contains a fully integrated, factory-trimmed silicon oscillator that serves as the master clock source. This is explicitly stated in the product description: "programmable, fixed-frequency oscillator requiring no external components for operation."
How is frequency programmed on the DS1077U-133+?
Frequency is programmed via the 2-wire (I²C-compatible) serial interface by writing values to three internal registers: MUX (sets P0 and P1 prescaler divisors), DIV (sets N-divider value), and BUS (device address and write-control bits). All register values are stored nonvolatively in EEPROM and persist across power cycles. The DS1077U-133+ defaults to these stored values on power-up.
Can both outputs of the DS1077U-133+ be disabled independently?
Yes - OUT0 can be gated via CTRL0 (configured as output enable or power-down using EN0/SEL0/PDN0 bits), and OUT1 can be gated via CTRL1 (using PDN1 bit). Both pins support synchronous Hi-Z transitions, and either CTRL0 or CTRL1 can be used to power down the entire device when appropriately configured, as confirmed in Tables 1 and 2 of the datasheet.
What package type is used for the DS1077U-133+?
The DS1077U-133+ uses an 8-pin 118mil µSOP package (JEDEC MO-187AA), as indicated by the "U" suffix in the part number per the Ordering Information table. This surface-mount package measures 3.0mm × 3.0mm with 0.5mm pitch, enabling high-density PCB layouts while maintaining compatibility with standard reflow processes.
DS1077U-133+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- EconOscillator™
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Oscillator, Fixed Frequency (Dual)
- Count:
- -
- Frequency:
- 16.2kHz ~ 133.333MHz
- Voltage - Supply:
- 4.75V ~ 5.25V
- Current - Supply:
- 50 mA
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-uMAX/uSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
DS1077U-133+ FAQ
1.How can I place an order for DS1077U-133+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1077U-133+ 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 DS1077U-133+ reliable?
The price and inventory of DS1077U-133+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1077U-133+ is usually 5 days.
3.What payment methods are accepted for DS1077U-133+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1077U-133+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1077U-133+?
DS1077U-133+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1077U-133+ 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 DS1077U-133+?
For technical support, including DS1077U-133+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1077U-133+ requirements.
6.How does Aetrix verify that DS1077U-133+ is sourced from the original manufacturer or authorized distributors?
All DS1077U-133+ 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 DS1077U-133+ meets industry standards.
7.What is the process for return or replacement of DS1077U-133+?
All DS1077U-133+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1077U-133+, 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 DS1077U-133+ part is unused and in its original packaging.
Return procedure for DS1077U-133+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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