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Analog Devices Inc./Maxim Integrated DS3065W-100#
- Part No.:
- DS3065W-100#
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 256-BGA
- Datasheet:
-
DS3065W-100#.pdf
- Description:
- IC NVSRAM 8MBIT PARALLEL 256BGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,469
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Product details
Overview
The DS3065W-100# from Maxim Integrated is a 3.3V, 8Mb (1024k × 8) nonvolatile SRAM with integrated year-2000-compliant real-time clock (RTC), internal rechargeable manganese lithium (ML) battery, and power-fail management circuitry - all in a single 256-ball 27mm × 27mm BGA module. It operates across –40°C to +85°C, delivers 100ns access time, and unconditionally write-protects memory and RTC registers when VCC drops below 2.8V, enabling reliable data retention in RAID systems and industrial controllers.
For engineers reviewing the DS3065W-100# datasheet, DS3065W-100# pinout, DS3065W-100# application, or DS3065W-100# equivalent, this page provides verified technical context, validated pin functions, confirmed industrial temperature operation, battery-backed RTC alarm/wake-up capability, and direct alternatives for system-level power-fail resilience and time-stamped data logging.
Technical Context
The DS3065W-100# integrates three functional blocks on a single BGA substrate: a static SRAM array (1024k × 8), a full-function RTC with century/year/month/date/hour/minute/second BCD registers and alarm/wake-up logic, and an ML battery with on-chip charger and voltage-monitoring circuitry. Its dual-mode interface uses CE/WE/OE for SRAM access and CS/WE/OE for RTC register access, with separate RST (open-drain reset supervisor) and IRQ/FT (open-drain interrupt/frequency test) outputs.
Power management is hardware-automated: VCC monitoring triggers unconditional write protection at ≤2.8V (VTP), switches to battery supply at ~2.5V (VSW), and initiates 125ms recovery before resuming normal operation. The RTC oscillator is factory-trimmed to ±1 minute/month accuracy at +25°C and supports frequency test mode (512Hz output on IRQ/FT) and watchdog timer with programmable timeout (1/16s to 128s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 8Mb (1024k × 8 bits) NV SRAM with automatic battery backup and unconditional write protection |
| RTC Accuracy | ±1 minute per month at +25°C; Y2K-compliant calendar with leap-year/day-of-month correction |
| Access Time | 100ns - enables direct replacement of standard 3.3V SRAM in microprocessor bus interfaces |
| Supply Voltage | 3.3V ±0.3V - operates within JEDEC-compliant 3.3V I/O rail tolerances |
| Operating Temperature | –40°C to +85°C - qualified for industrial control, POS, and networking equipment |
| Data Retention | 2–3 years per full charge - sustained by internal ML battery without external components |
| Package | 256-ball BGA, 27mm × 27mm footprint - reflow-compatible, UL-recognized module |
Pinout & Package
DS3065W-100# uses a 256-ball BGA package (27mm × 27mm) with ground-signal-power ball mapping optimized for low-noise memory/RTC operation. Pinout includes dedicated SRAM (CE, OE, WE, A0–A19, DQ0–DQ7) and RTC (CS) control lines, dual open-drain outputs (RST, IRQ/FT), and distributed GND/VCC balls for stable power delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | SRAM Address Inputs / RTC Address LSBs (A0–A3) | 20-bit address bus for SRAM; lower 4 bits select among 16 RTC registers |
| DQ0–DQ7 | Bidirectional Data Bus | Byte-wide interface compatible with 3.3V microprocessors and DSPs |
| CE | SRAM Chip Enable | Active-low enable for SRAM read/write; high during RTC access |
| CS | RTC Chip Select | Active-low enable for RTC register access; high during SRAM access |
| WE | Write Enable | Controls write strobe polarity for both SRAM and RTC; shared function with timing-critical setup/hold |
| OE | Output Enable | Enables SRAM/RTC data output drivers; high-impedance when inactive |
| RST | Open-Drain Reset Output | Asserts low during VCC fail; used as CPU supervisor with external pullup |
| IRQ/FT | Open-Drain Interrupt/Frequency Test | Configurable as RTC alarm output, system wake-up signal, or 512Hz oscillator test source |
Key Features
| Feature | Design Value |
|---|---|
| Single-piece BGA module | Eliminates discrete battery soldering risk - ML cell withstands convection reflow per IPC/JEDEC J-STD-020 |
| Unconditional write protection | Hardware-enforced lockout of SRAM/RTC writes when VCC < 2.8V - no firmware dependency |
| RTC alarm & wake-up | Programmable alarm (per second to per month) activates IRQ/FT even in battery-backup mode |
| Watchdog timer | Configurable timeout (1/16s to 128s) with flag (WF) and interrupt output - detects processor hang |
| UL recognition | Meets UL 60950-1 requirements for internal battery charging and short-circuit protection |
Applications
| RAID Systems & Servers | Gaming Consoles |
|---|---|
Use Scenario: Maintaining configuration metadata, boot counters, and timestamped error logs during unexpected AC loss or hot-swap events. IC Role / Device Role / Timing Role: Nonvolatile SRAM + RTC co-processor providing atomic power-fail-safe storage and wall-clock timestamping. Use Value: Prevents log corruption and enables precise failure diagnostics via battery-backed time stamps aligned to system uptime. |
Use Scenario: Preserving game state, save files, and session timers across console power cycles and standby modes. IC Role / Device Role / Timing Role: Unified memory/timing unit delivering persistent storage and real-time elapsed-time tracking without external support ICs. Use Value: Enables seamless resume-from-standby and accurate in-game time progression using factory-trimmed ±1 min/month RTC. |
| POS Terminals | Industrial PLCs |
Use Scenario: Securing transaction records, tax audit logs, and fiscal date stamps during brownouts or battery swaps in retail environments. IC Role / Device Role / Timing Role: Tamper-resistant timekeeping and nonvolatile memory subsystem certified for fiscal compliance. Use Value: Meets regulatory requirements for immutable time-stamped transaction history with guaranteed 2–3 year data retention per charge. |
Use Scenario: Logging sensor readings, cycle counts, and maintenance intervals in factory automation systems operating continuously for years. IC Role / Device Role / Timing Role: Industrial-grade RTC/SRAM with watchdog supervision and wide-temperature operation. Use Value: Ensures deterministic alarm-triggered maintenance alerts and uninterrupted data logging across –40°C to +85°C ambient ranges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM with integrated RTC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1265W-100# | No integrated RTC or battery; requires external crystal, backup capacitor, and supervisory circuitry | Limited to pure NV SRAM use cases; cannot replace DS3065W-100# in RTC-dependent designs | Select only if existing design already implements discrete RTC/battery and only memory expansion is needed |
| STK15C88-3LF35 | 4Mb capacity, 35ns access, 5V-only supply; no alarm/wake-up or watchdog features | Suitable for legacy 5V industrial systems but lacks Y2K-compliance and battery-backed alarm functionality | Choose only for cost-sensitive 5V applications where RTC features are unused and capacity suffices |
Compared with DS1265W-100# and STK15C88-3LF35, the DS3065W-100# uniquely combines 8Mb NV SRAM, Y2K-compliant RTC, alarm/wake-up, watchdog, and reflow-tolerant ML battery in one BGA - eliminating 4+ discrete components and enabling compact, certified, long-retention time-stamped logging.
Availability
DS3065W-100# is available at Aetrix Electronics and suitable for RAID systems, industrial PLCs, and POS terminals requiring stable component supply, long-term data retention, and certified RTC functionality across extended temperature ranges.
Supply support for DS3065W-100# 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, computing, and communications applications.
The DS3065W-100# belongs to Maxim's nonvolatile memory product line, designed specifically for systems needing tamper-resistant time-stamped data storage without external RTC or battery management circuitry.
FAQ
What is the guaranteed data retention time for DS3065W-100# under battery backup?
The DS3065W-100# provides 2–3 years of data retention per full charge of its internal manganese lithium battery, assuming initial VCC application for ≥96 hours to achieve full charge and no more than two convection reflow exposures at +230°C. This retention is specified at +25°C and is assured by component selection and design - not production-tested per unit.
Does DS3065W-100# support direct replacement of standard 3.3V SRAM in existing designs?
Yes, DS3065W-100# is pin-compatible and timing-compatible with standard 3.3V ×8 SRAMs (e.g., 1024k × 8 organization, 100ns access). Its CE/OE/WE/A/DQ interface matches common microprocessor buses. However, CS must be driven separately for RTC access, and RST/IRQ/FT require external pullups - minor layout updates may be needed for full feature utilization.
How does the DS3065W-100# RTC alarm function during power failure?
The DS3065W-100# RTC alarm remains fully operational during battery backup: when AE=1 and ABE=1, a match between RTC registers and alarm registers (2h–5h) pulls IRQ/FT low - serving as a system wake-up signal. The alarm flag (AF) persists through power cycles and can be read after VCC restoration to detect missed alarms.
What is the role of the VTP and VSW thresholds in DS3065W-100# power management?
VTP (2.8–3.0V) is the write-protection threshold: below this, SRAM/RTC writes are disabled to prevent corruption. VSW (~2.5V) is the switchover threshold: below this, the internal ML battery powers the RTC and SRAM. DS3065W-100# guarantees tREC = 125ms recovery after VCC exceeds VTP before normal operation resumes.
Can the DS3065W-100# watchdog timer be used independently of the RTC functions?
Yes - the DS3065W-100# watchdog timer operates independently: it uses the WATCHDOG register (7h), is reset by any read/write to that register, and asserts IRQ/FT on timeout. It requires no RTC initialization or oscillator enablement, making it usable even if the RTC is disabled or unconfigured.
DS3065W-100# Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 256-BGA
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 8Mbit
- Memory Organization:
- 1M x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 100ns
- Access Time:
- 100 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-BGA (27x27)
DS3065W-100# FAQ
1.How can I place an order for DS3065W-100# through Aetrix?
Please submit a Request for Quotation (RFQ) for DS3065W-100# 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 DS3065W-100# reliable?
The price and inventory of DS3065W-100# are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS3065W-100# is usually 5 days.
3.What payment methods are accepted for DS3065W-100#?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS3065W-100# transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS3065W-100#?
DS3065W-100# orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS3065W-100# 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 DS3065W-100#?
For technical support, including DS3065W-100# datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS3065W-100# requirements.
6.How does Aetrix verify that DS3065W-100# is sourced from the original manufacturer or authorized distributors?
All DS3065W-100# 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 DS3065W-100# meets industry standards.
7.What is the process for return or replacement of DS3065W-100#?
All DS3065W-100# units undergo pre-shipment inspection (PSI). If there is an issue with DS3065W-100#, 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 DS3065W-100# part is unused and in its original packaging.
Return procedure for DS3065W-100#:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS3065W-100# Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
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24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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