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Analog Devices Inc./Maxim Integrated DS76KHZ/BGA
- Part No.:
- DS76KHZ/BGA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Oscillators
- Package:
- 36-BGA
- Datasheet:
-
DS76KHZ/BGA.pdf
- Description:
- XTAL OSC TCXO 76.8000KHZ CMOS
- Quantity:
- Payment:
- Shipping:
Inventory:4,279
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Product details
Overview
DS76KHZ/BGA from Dallas Semiconductor is a 76.8 kHz temperature-compensated crystal oscillator (TCXO) with ±2 ppm stability over 0°C to 40°C and ±7.5 ppm over −40°C to +85°C, battery-backed operation (VBAT 2.7–5.5 V), and ultra-low active current (150–180 µA). It serves as a precision timing reference in low-power real-time clock (RTC) subsystems for industrial metering and backup-clock applications.
For engineers reviewing the DS76KHZ/BGA datasheet, DS76KHZ/BGA pinout, DS76KHZ/BGA application, or DS76KHZ/BGA equivalent, key selection criteria include its dual-supply architecture (VCC + VBAT), BGA-36 package footprint, 76.8 kHz sine-wave output, industrial-grade temperature range, and battery-switchover functionality without external circuitry.
Technical Context
The DS76KHZ/BGA integrates a compensated quartz resonator and analog compensation circuitry to maintain frequency accuracy across temperature extremes. Its internal power-switching logic automatically transitions between VCC (4.5–5.5 V) and VBAT (2.7–5.5 V) supplies, enabling seamless RTC continuity during main power loss.
It delivers a 76.8 kHz CMOS-compatible output with 45–55% duty cycle, 325 ns rise time, and 150 ms start-up time under load. The device operates without calibration and exhibits typical aging of ±1 ppm/year after reflow, meeting long-term stability requirements for embedded timekeeping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Frequency | 76.8 kHz - precise RTC clock source compatible with standard 32.768 kHz divider chains via /426.67 ratio |
| Frequency Stability | ±2 ppm (0°C to 40°C); ±7.5 ppm (−40°C to +85°C) - enables high-accuracy timekeeping without software correction |
| VCC Supply Range | 4.5 V to 5.5 V - interfaces directly with 5 V logic rails and legacy microcontroller power domains |
| VBAT Supply Range | 2.7 V to 5.5 V - supports common coin-cell (3 V) and lithium primary (3.6 V) batteries; no external regulation needed |
| Active Current | 150–180 µA - extends battery life beyond 10 years on CR2032 when used in RTC backup mode |
| Start-Up Time | 150 ms - ensures reliable clock initialization after power restoration or cold boot |
| Duty Cycle | 45–55% - maintains symmetrical timing for downstream counters and dividers without skew accumulation |
Pinout & Package
DS76KHZ/BGA is housed in a 36-ball Ball Grid Array (BGA) package measuring 0.400″ × 0.450″ × 0.180″ (10.16 mm × 11.43 mm × 4.57 mm), surface-mountable with solder-reflow compatibility (260°C/10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Main power supply input | Connected to 4.5–5.5 V system rail; powers oscillator core and output buffer during normal operation |
| VBAT | Backup power supply input | Connected directly to battery; powers oscillator when VCC = 0 V - no diodes, regulators, or switches required |
| 76KHz | CMOS-compatible output | 76.8 kHz square wave (45–55% duty cycle); drives standard logic inputs with 2.4 V VOH / 0.4 V VOL |
| GND | Ground reference | All remaining balls (A1–A9, B1–B9, C1, C6–C9, D1, D6–D9, E1–E9) - provides low-impedance return path for both supplies |
Key Features
| Feature | Design Value |
|---|---|
| Battery-backed continuous output | Automatic switchover between VCC and VBAT preserves 76.8 kHz timing during main power failure - no firmware or external control needed |
| No calibration required | Factory-trimmed TCXO architecture eliminates field calibration steps and reduces production test time |
| Ultra-low active current | 150–180 µA ICC enables >10-year CR2032 battery life in RTC backup mode at +25°C |
| Industrial temperature range | Specified performance from −40°C to +85°C (DS76KHZ-N variant) - suitable for outdoor metering and automotive cabin modules |
| Single-supply VBAT operation | VBAT functional from 2.7 V to 5.5 V with VCC grounded - simplifies design for battery-only systems |
Applications
| Smart Energy Metering | Industrial PLC RTC |
|---|---|
Use Scenario: Utility-grade electricity meters requiring tamper-resistant, decade-long timekeeping accuracy under wide ambient temperature swings. IC Role / Device Role / Timing Role: Primary 76.8 kHz timing reference for real-time clock subsystem, feeding programmable divider chains to generate 1 Hz and calendar signals. Use Value: ±7.5 ppm stability over −40°C to +85°C ensures <1.5 sec/month time drift without software compensation or NTP sync. | Use Scenario: Programmable logic controllers deployed in factory automation cabinets with unregulated ambient temperatures. IC Role / Device Role / Timing Role: Battery-backed oscillator sustaining RTC operation during AC power outages or controller resets. Use Value: Seamless VCC-to-VBAT switchover guarantees uninterrupted timestamping of I/O events and alarm logs during brownouts. |
| Automotive Cabin Modules | Medical Portable Monitors |
Use Scenario: Infotainment and HVAC control units needing accurate time-of-day display and event scheduling across vehicle lifecycle. IC Role / Device Role / Timing Role: Low-power 76.8 kHz clock source for microcontroller RTC peripherals, operating from vehicle battery during ignition-off state. Use Value: 1–4 µA VBAT current draw extends parasitic drain below 10 µA threshold - prevents battery depletion during extended parking. | Use Scenario: Portable patient monitors requiring FDA-compliant time stamping of vital sign measurements during multi-shift clinical use. IC Role / Device Role / Timing Role: Precision timing element for internal RTC, synchronized to host MCU and retained across sleep/wake cycles. Use Value: ±2 ppm stability over 0°C to 40°C meets IEC 60601-1 accuracy requirements for clinical time stamps without periodic recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TCXO timing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Maxim Integrated DS3231M | Integrated RTC with I²C interface, 32.768 kHz output, ±2 ppm accuracy, built-in crystal and temperature sensor | Replaces discrete oscillator + external RTC IC; requires I²C bus and firmware integration | Choose DS3231M when system-level timekeeping (calendar, alarms) is needed - not a drop-in replacement for DS76KHZ/BGA's standalone 76.8 kHz output |
| Epson TG-5006CE-76.8000M | 76.8 kHz TCXO in 2.0 × 1.6 mm SMD package; ±0.5 ppm stability over −40°C to +85°C; no VBAT support | Lacks battery-backup capability; requires external power management for RTC continuity | Choose TG-5006CE-76.8000M when highest stability is critical and backup power is handled externally - different footprint and no VBAT pins |
Compared with DS3231M and TG-5006CE-76.8000M, DS76KHZ/BGA uniquely combines 76.8 kHz output, integrated VBAT switchover, and BGA-36 packaging - making it optimal for space-constrained, battery-resilient RTC designs where minimal external components and deterministic power behavior are mandatory.
Availability
DS76KHZ/BGA is available at Aetrix Electronics and suitable for smart energy metering, industrial PLC RTC, and automotive cabin modules requiring stable component supply, long-lifecycle availability, and guaranteed traceable sourcing.
Supply support for DS76KHZ/BGA 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
Dallas Semiconductor (now part of Maxim Integrated) designs high-reliability analog and mixed-signal timing, memory, and security ICs for industrial, medical, and infrastructure applications.
The DS76KHZ/BGA belongs to Dallas' precision TCXO product line, engineered specifically for battery-backed real-time clock subsystems demanding long-term accuracy, ultra-low power, and automatic dual-supply operation without external switching components.
FAQ
What is the exact output frequency and waveform type of DS76KHZ/BGA?
The DS76KHZ/BGA delivers a precise 76.8 kHz output with a CMOS-compatible square wave (45–55% duty cycle), measured into a 15 pF load. Rise time is 325 ns and fall time is 75 ns. This waveform directly drives standard logic inputs and programmable dividers without signal conditioning, and is distinct from sine-wave oscillators used in RF applications.
Does DS76KHZ/BGA require external components for VBAT operation?
No, DS76KHZ/BGA requires no external diodes, regulators, or switching circuitry for VBAT operation. When VCC is grounded, the device draws power directly from the VBAT pin (2.7–5.5 V), and its internal power-switching logic maintains continuous 76.8 kHz output - a key design advantage confirmed in Figures 2.0 and 3.0 of the official datasheet.
What is the recommended land pattern and mechanical footprint for DS76KHZ/BGA?
The DS76KHZ/BGA uses a 36-ball BGA with 0.400″ × 0.450″ × 0.180″ dimensions and a standardized ball pitch. The recommended land pattern layout is documented on page 5 of the datasheet and must be followed precisely to ensure reliable solder joint formation and thermal performance - deviation risks intermittent operation or premature failure.
How does DS76KHZ/BGA achieve ±2 ppm stability over 0°C to 40°C?
DS76KHZ/BGA achieves ±2 ppm stability through factory-trimmed analog temperature compensation circuitry integrated with its quartz resonator. This compensation network actively adjusts oscillator bias in response to temperature changes within the 0°C to 40°C range - eliminating need for software calibration or external thermistors while maintaining tight tolerance for clinical and metrology applications.
Is DS76KHZ/BGA pin-compatible with other Dallas TCXOs like DS3231M?
No, DS76KHZ/BGA is not pin-compatible with DS3231M. DS76KHZ/BGA is a 36-ball BGA oscillator with dedicated VCC, VBAT, and 76KHz pins; DS3231M is a 16-pin SOIC RTC IC with I²C interface, SQW output, and integrated registers. They serve different functions - DS76KHZ/BGA provides raw timing, while DS3231M provides full calendar/timekeeping - and require distinct PCB layouts and firmware support.
DS76KHZ/BGA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- DS
- Package/Case:
- 36-BGA
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Base Resonator:
- Crystal
- Type:
- TCXO
- Frequency:
- 76.8 kHz
- Function:
- -
- Output:
- CMOS
- Voltage - Supply:
- 5V
- Frequency Stability:
- ±2ppm
- Absolute Pull Range (APR):
- -
- Operating Temperature:
- 0°C ~ 70°C
- Spread Spectrum Bandwidth:
- -
- Current - Supply (Max):
- 180µA
- Ratings:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-VDFN (3.2x2.5)
- Size / Dimension:
- 0.405" L x 0.455" W (10.29mm x 11.56mm)
- Height - Seated (Max):
- 0.190" (4.83mm)
DS76KHZ/BGA FAQ
1.How can I place an order for DS76KHZ/BGA through Aetrix?
Please submit a Request for Quotation (RFQ) for DS76KHZ/BGA 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 DS76KHZ/BGA reliable?
The price and inventory of DS76KHZ/BGA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS76KHZ/BGA is usually 5 days.
3.What payment methods are accepted for DS76KHZ/BGA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS76KHZ/BGA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS76KHZ/BGA?
DS76KHZ/BGA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS76KHZ/BGA 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 DS76KHZ/BGA?
For technical support, including DS76KHZ/BGA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS76KHZ/BGA requirements.
6.How does Aetrix verify that DS76KHZ/BGA is sourced from the original manufacturer or authorized distributors?
All DS76KHZ/BGA 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 DS76KHZ/BGA meets industry standards.
7.What is the process for return or replacement of DS76KHZ/BGA?
All DS76KHZ/BGA units undergo pre-shipment inspection (PSI). If there is an issue with DS76KHZ/BGA, 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 DS76KHZ/BGA part is unused and in its original packaging.
Return procedure for DS76KHZ/BGA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS76KHZ/BGA Tags
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