DS3234SN# Maxim Integrated Integrated Circuit (Small Outline Packages) In Stock
Maxim DS3234SN# is an extremely accurate SPI real-time clock with integrated 256-byte SRAM, battery backup, and calendar functions in a 20-pin SOIC package. It operates up to 4 MHz SPI clock and supports 2.0 V minimum operation, making it ideal for data loggers, embedded systems, and portable instrumentation.
- Manufacturer
- Maxim Integrated
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- DS3234SN# Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.8209(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- High-accuracy SPI real-time clock with battery backup and full calendar function (year, month, day, hour, minute, second)
- Integrated 256-byte on-chip SRAM for non-volatile data storage independent of the RTC timekeeping
- 4-wire SPI serial interface supporting up to 4 MHz clock frequency for fast microcontroller communication
- Operates at as low as 2 V minimum supply voltage with 2 MHz SPI access, enabling battery-powered designs
- Interrupt output capability for alarm triggering and programmable square-wave output in embedded applications
- 20-pin wide-body SOIC (300 mil) package with JEDEC e3 lead-free compliant termination
Applications
The DS3234SN# is widely used in data loggers, industrial controllers, and portable test equipment where accurate timekeeping with SRAM-based parameter storage must be maintained across power cycles using a backup coin cell battery. Its SPI interface and low 2.0 V minimum operating voltage also make it well suited for ultra-low-power IoT edge nodes and wearable devices requiring calendar alarms and epoch timestamping.
Specifications
| Manufacturer Package Code | 20-SOIC_W-300_MIL |
| Date Of Intro | 2006-07-24 |
| YTEOL | 10 |
| Additional Feature | operates with 2MHZ @ 2VMIN |
| Clock Frequency-Max | 4MHz |
| Information Access Method | SERIAL(SPI), SERIAL, 4-WIRE |
| Interrupt Capability | Y |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e3 |
| Number of Bits | 8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 2.7V |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time-Min | SECONDS |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Volatile | NO |
| uPs/uCs/Peripheral ICs Type | TIMER, REAL TIME CLOCK |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Japan, Mainland China, Malaysia, Philippines, Singapore, South Korea, Taiwan, Thailand, USA |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How fast can the DS3234SN# SPI interface operate and what is the minimum supply voltage for communication?
The DS3234SN# supports SPI clock frequencies up to 4 MHz at standard supply voltages, and it operates the SPI interface at up to 2 MHz when running from a 2.0 V minimum supply. This low-voltage SPI capability allows direct interfacing with 1.8 V or 2.5 V microcontrollers in battery-powered applications without level-shifting in many designs.
What non-volatile storage does the DS3234SN# provide beyond RTC timekeeping, and how large is it?
Beyond its real-time clock and calendar registers, the DS3234SN# integrates 256 bytes of on-chip SRAM accessible via the SPI interface. This non-volatile memory allows embedded systems to store calibration constants, configuration parameters, or small data records without a separate external EEPROM, reducing component count in data logger and instrumentation designs.
For a battery-backed data logger, how does the DS3234SN# maintain time accuracy during power outages?
The DS3234SN# includes an integrated battery backup circuit that automatically switches to a connected coin cell (typically 3 V CR2032 rated at 220 mAh) when the main VCC supply drops below the backup threshold. During backup operation, the RTC continues counting seconds, minutes, hours, and calendar data with typical accuracy within ±2 minutes per year, preserving timestamps across extended power outages.
When should engineers choose the DS3234SN# over the DS3231 for a design requiring local parameter storage?
Engineers should select the DS3234SN# over the DS3231 when the application requires on-chip non-volatile data storage, since the DS3234 adds 256 bytes of SRAM that the DS3231 lacks. Both parts use SPI or I2C interfaces and share similar -40°C to +85°C operating temperature range, but the DS3234 is better suited for designs needing a single-chip solution combining timekeeping, alarms, and small local data storage.
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About Maxim Integrated
Maxim Integrated is a leading electronic component manufacturer. FindMyChip sources Maxim Integrated ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $13.7700 | $13.77 |
| 3+ | $5.5400 | $16.62 |
| 10+ | $5.2900 | $52.90 |
| 36+ | $4.9000 | $176.40 |
| 51+ | $3.9702 | $202.48 |
| 66+ | $3.8209 | $252.18 |
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