My Inquiry
My Account
Analog Devices Inc./Maxim Integrated DS1230AB-70IND+
- Part No.:
- DS1230AB-70IND+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Memory
- Package:
- 28-DIP Module (0.600", 15.24mm)
- Datasheet:
-
DS1230AB-70IND+.pdf
- Description:
- IC NVSRAM 256KBIT PAR 28EDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,679
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DS1230AB-70IND+ from Maxim Integrated is a 256k (32k × 8) nonvolatile static RAM with lithium backup, industrial temperature rating (–40°C to +85°C), ±5% VCC tolerance (4.75V–5.25V), and 70 ns read/write access time. It functions as a drop-in replacement for volatile SRAMs in mission-critical data logging, real-time clock memory, and configuration storage where power loss resilience is essential.
For engineers reviewing the DS1230AB-70IND+ datasheet, DS1230AB-70IND+ pinout, DS1230AB-70IND+ application, or DS1230AB-70IND+ equivalent, key selection criteria include guaranteed 10-year data retention without external power, automatic write protection during VCC decay below 4.5 V, JEDEC-standard 28-pin DIP compatibility, and industrial-grade reliability under thermal stress.
Technical Context
The DS1230AB-70IND+ integrates a 262,144-bit SRAM array, lithium battery, and voltage-monitoring control circuitry in a single monolithic 28-pin EDIP package. Its self-contained power-fail detection triggers unconditional write protection and seamless lithium switchover when VCC drops below 4.5 V, ensuring zero data corruption during brownout or shutdown.
It operates in three distinct modes: normal read/write (VCC ≥ 4.75 V), data retention (VCC < 3.0 V, lithium-powered), and transitional protection (3.0 V ≤ VCC < 4.75 V). The device requires no external support circuitry and maintains full pin compatibility with standard 28-pin 32k × 8 SRAMs and 28256 EEPROMs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 256 kbit (32,768 × 8), directly replaces legacy 32k × 8 volatile SRAMs without address decoding changes |
| Access Time | 70 ns max - enables direct interface with 14 MHz microcontrollers and legacy bus systems |
| VCC Range | 4.75 V to 5.25 V (±5%) - supports stable operation across industrial-grade power rails with minimal regulation overhead |
| Data Retention | 10 years minimum without external power - achieved via sealed lithium cell and automatic disconnect until first power-up |
| Operating Temp | –40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor metering environments |
| Write Cycles | Unlimited - eliminates wear-out concerns in high-frequency configuration update applications |
| Package | 28-pin 740-mil Extended DIP (EDIP) - JEDEC-standard footprint compatible with existing through-hole PCB layouts |
Pinout & Package
DS1230AB-70IND+ uses a JEDEC-standard 28-pin Extended DIP (EDIP) package with 740-mil width, wave- or hand-solderable only (not reflow-compatible). The package integrates SRAM, lithium battery, and control logic into one hermetically sealed unit.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32k-word addressing; TTL/CMOS compatible |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus with 2 mA sink / 1 mA source drive capability |
| CE | Chip Enable | Active-low chip select; initiates read/write when low and synchronized with WE/OE |
| WE | Write Enable | Active-low write strobe; controls data latching and disables outputs during write to prevent bus contention |
| OE | Output Enable | Active-low output enable; places DQ lines in high-impedance state when high during reads |
| VCC | Power Supply | +5 V supply input; monitored continuously for out-of-tolerance conditions triggering backup mode |
| GND | Ground | Reference return path for all signals and internal lithium circuitry |
| NC | No Connect | Pins 1, 3, 4, and 33 are unconnected; must remain floating per design |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Power-Fail Protection | Monitors VCC in real time; switches to lithium backup and locks writes within 1.5 µs of VCC falling below 4.5 V |
| Freshness Seal | Lithium cell electrically disconnected at shipment; activated only on first VCC application >4.25 V, preserving full 10-year capacity |
| Zero External Support Circuitry | Requires no external capacitors, regulators, or supervisory ICs - simplifies BOM and layout for space-constrained designs |
| Direct Pin Compatibility | Matches pinout of industry-standard 28-pin 32k × 8 SRAMs and 28256 EEPROMs - enables drop-in replacement without PCB revision |
| Industrial Temperature Qualification | Guaranteed functionality and data retention over –40°C to +85°C - validated per JEDEC JESD22-A108 and JESD22-A104 |
Applications
| Industrial Data Logger | Real-Time Clock (RTC) Backup Memory |
|---|---|
|
Use Scenario: Continuous environmental sensor data capture in remote utility meters operating off intermittent solar/battery power. IC Role / Device Role / Timing Role: Nonvolatile SRAM storing timestamped readings during grid outages or battery depletion events. Use Value: Ensures no loss of regulatory-compliant historical data even after 10 years of unpowered storage between maintenance cycles. |
Use Scenario: Maintaining accurate timekeeping and alarm registers in HVAC controllers during AC mains failure. IC Role / Device Role / Timing Role: RTC backup memory holding calendar, alarm flags, and calibration offsets while main power is absent. Use Value: Eliminates need for external supercapacitor or coin-cell holder; retains time accuracy for >10 years without service intervention. |
| Programmable Logic Controller (PLC) Configuration Storage | Medical Device Calibration Memory |
|
Use Scenario: Storing firmware configuration parameters and I/O mapping tables in factory-floor PLCs exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: Persistent configuration register bank retaining user-defined operational settings across power cycles and firmware updates. Use Value: Prevents factory reset on unexpected shutdown; guarantees deterministic startup behavior in safety-critical automation sequences. |
Use Scenario: Holding factory-calibrated sensor gain/offset coefficients and usage history in portable diagnostic equipment. IC Role / Device Role / Timing Role: Tamper-resistant calibration memory that survives sterilization cycles and long-term shelf storage. Use Value: Meets IEC 62304 Class B software requirements by guaranteeing traceable, uncorrupted calibration data across device lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar nonvolatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1230Y-70IND+ | Wider VCC range (4.5 V–5.5 V, ±10%), lower write-protection threshold (4.25 V) | Better suited for systems with poorly regulated 5 V supplies or brownout-prone environments | Select DS1230Y-70IND+ if VCC stability is marginal; DS1230AB-70IND+ preferred for tightly regulated industrial rails. |
| STK12C68-70I | Same 256k size and 70 ns speed, but uses external lithium battery and separate controller IC | Requires additional PCB area and two components vs. DS1230AB-70IND+'s integrated module | Choose STK12C68-70I only if modular battery replacement is mandatory; DS1230AB-70IND+ offers higher integration and reliability. |
Compared with DS1230Y-70IND+, DS1230AB-70IND+ provides tighter VCC tolerance and higher write-protection voltage-critical for noise-immune operation in factory automation. Against STK12C68-70I, it delivers superior board-level reliability via monolithic construction and eliminates interconnect failure points.
Availability
DS1230AB-70IND+ is available at Aetrix Electronics and suitable for industrial data loggers, real-time clock backup systems, and programmable logic controller configuration storage requiring stable component supply, long-lifecycle availability, and RoHS-compliant sourcing.
Supply support for DS1230AB-70IND+ 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, medical, and communications applications.
The DS1230AB-70IND+ belongs to Maxim's nonvolatile SRAM product line, engineered to eliminate external battery management circuitry while delivering guaranteed 10-year data retention in harsh industrial environments.
FAQ
What is the guaranteed data retention period for DS1230AB-70IND+?
The DS1230AB-70IND+ guarantees a minimum of 10 years of data retention in the absence of external power. This specification is assured by component selection, process control, and design-not measured per unit-and begins counting from the moment VCC is first applied above 4.25 V, which activates the sealed lithium energy source inside the DS1230AB-70IND+.
Does DS1230AB-70IND+ require external circuitry for battery backup operation?
No, the DS1230AB-70IND+ requires no external circuitry. It integrates a lithium energy source, voltage-monitoring control logic, and SRAM into a single 28-pin EDIP package. The DS1230AB-70IND+ automatically detects VCC decay, disables writes, and switches to lithium power without any external components-making it a true plug-and-play nonvolatile memory solution.
What is the difference between DS1230AB-70IND+ and DS1230Y-70IND+?
The DS1230AB-70IND+ operates over a tighter VCC range (4.75 V–5.25 V, ±5%) and triggers write protection at 4.5 V, whereas DS1230Y-70IND+ supports 4.5 V–5.5 V (±10%) and protects at 4.25 V. Both share identical 70 ns timing, industrial temperature rating, and pinout-but DS1230AB-70IND+ is optimized for well-regulated power systems demanding higher noise immunity.
Can DS1230AB-70IND+ be used as a direct replacement for standard 28-pin SRAMs?
Yes, the DS1230AB-70IND+ features a JEDEC-standard 28-pin DIP footprint and matches the pinout of conventional 32k × 8 SRAMs and 28256 EEPROMs. Its CE, WE, OE, address, and data pin assignments are functionally identical-enabling drop-in replacement without PCB modification or firmware changes in existing designs using DS1230AB-70IND+.
Is DS1230AB-70IND+ RoHS-compliant and lead-free?
Yes, the "+" suffix in DS1230AB-70IND+ indicates a lead(Pb)-free and RoHS-compliant package. The device meets EU Directive 2011/65/EU and is manufactured using Maxim's qualified green packaging process, with full material declarations and test reports available upon request for DS1230AB-70IND+.
DS1230AB-70IND+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 28-DIP Module (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- NVSRAM
- Technology:
- NVSRAM (Non-Volatile SRAM)
- Memory Size:
- 256Kbit
- Memory Organization:
- 32K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 70ns
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 28-EDIP
DS1230AB-70IND+ FAQ
1.How can I place an order for DS1230AB-70IND+ through Aetrix?
Please submit a Request for Quotation (RFQ) for DS1230AB-70IND+ 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 DS1230AB-70IND+ reliable?
The price and inventory of DS1230AB-70IND+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1230AB-70IND+ is usually 5 days.
3.What payment methods are accepted for DS1230AB-70IND+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1230AB-70IND+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DS1230AB-70IND+?
DS1230AB-70IND+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DS1230AB-70IND+ 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 DS1230AB-70IND+?
For technical support, including DS1230AB-70IND+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1230AB-70IND+ requirements.
6.How does Aetrix verify that DS1230AB-70IND+ is sourced from the original manufacturer or authorized distributors?
All DS1230AB-70IND+ 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 DS1230AB-70IND+ meets industry standards.
7.What is the process for return or replacement of DS1230AB-70IND+?
All DS1230AB-70IND+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1230AB-70IND+, 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 DS1230AB-70IND+ part is unused and in its original packaging.
Return procedure for DS1230AB-70IND+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DS1230AB-70IND+ Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
