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Analog Devices Inc./Maxim Integrated DS1250ABP-70IND+

Name: DS1250ABP-70IND+
Brand: Analog Devices Inc./Maxim Integrated
SKU: DS1250ABP-70IND+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: DS1250ABP-70IND+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Memory

Package:: 34-PowerCap™ Module

Datasheet:: DS1250ABP-70IND+.pdf

Description:: IC NVSRAM 4MBIT PAR 34PWRCAP

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Product details

Overview

DS1250ABP-70IND+ from Maxim Integrated is a 4,194,304-bit (512k × 8) nonvolatile static RAM with integrated lithium backup, industrial temperature rating (–40°C to +85°C), ±5% V_CC tolerance (4.75V–5.25V), and 70ns read/write access time. It functions as a drop-in replacement for volatile SRAM in data-critical systems requiring guaranteed retention during power loss - such as industrial PLCs, medical data loggers, and telecom base station configuration storage.

For engineers reviewing the DS1250ABP-70IND+ datasheet, DS1250ABP-70IND+ pinout, DS1250ABP-70IND+ application, or DS1250ABP-70IND+ equivalent, key selection criteria include its PowerCap Module (PCM) surface-mount form factor, automatic V_CC failover timing (t_PD = 1.5µs), write-protection threshold (V_TP = 4.50–4.75V), and compatibility with DS9034PC+/DS9034PCI+ snap-on PowerCaps.

Technical Context

The DS1250ABP-70IND+ integrates SRAM, lithium battery switching circuitry, and voltage-monitoring logic into a single 34-pin PowerCap Module. Its control architecture continuously monitors V_CC; when voltage drops below 4.5V, it unconditionally enables write protection and switches to lithium backup within 1.5µs - ensuring zero data corruption during brownout or power failure.

It operates in three distinct modes: normal read/write (V_CC ≥ 4.75V), data retention (V_CC < 3.0V, lithium-powered), and transitional power-down/power-up (3.0V ≤ V_CC < 4.75V). All 19 address lines (A0–A18) and 8 bidirectional data lines (DQ0–DQ7) remain fully functional across modes, with no external support circuitry required.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory Size	4,194,304 bits (524,288 × 8), directly replaces 512k × 8 volatile SRAM without address decoding changes
Access Time	70 ns t_ACC at V_CC = 5V ±5%, enabling direct interface with 14 MHz microcontrollers and legacy bus systems
Write Protection Threshold	V_TP = 4.50–4.75V; triggers unconditional write lock and high-Z outputs before V_CC reaches critical data-loss levels
Data Retention	10 years minimum in absence of V_CC, measured from first user power application - guaranteed by sealed lithium cell and low-standby ICCS2 ≤ 150 µA
Operating Temperature	–40°C to +85°C industrial grade; validated across full range for both functional operation and retention reliability
Supply Tolerance	±5% (4.75V–5.25V); tighter regulation than DS1250Y variants, supporting stable operation in noisy industrial rails
PowerCap Interface	34-pin PCM package with keyed mechanical alignment; requires separate DS9034PC+ or DS9034PCI+ PowerCap for full nonvolatile function

Pinout & Package

DS1250ABP-70IND+ uses a 34-pin PowerCap Module (PCM) package - a surface-mountable module base designed for reflow soldering prior to snap-on attachment of the DS9034PC+ PowerCap. The PCM provides standardized contacts for lithium battery connection while isolating the battery from thermal stress.

Pin/Terminal	Circuit Role	Design Meaning
A0–A18	Address Inputs	19-bit address bus supporting full 524,288-word addressing; compatible with standard 8-bit microprocessor buses
DQ0–DQ7	Data I/O	Bidirectional 8-bit data bus; high-impedance during write cycles when OE is inactive to prevent bus contention
CE	Chip Enable	Active-low chip select; falling edge initiates read/write; rising edge terminates cycle; controls internal state transitions
WE	Write Enable	Active-low write strobe; combined with CE to define write start/stop; disables outputs in t_ODW = 25 ns on falling edge
OE	Output Enable	Active-low output control; enables data drivers only during reads; must be high during writes to avoid contention
V_CC	Power Supply	+5V ±5% main supply; powers SRAM core and control logic; monitored continuously for failover decisions
GND	Ground	Signal and power return reference; two dedicated pins (pins 17 and 32) reduce ground bounce in high-speed access
VBAT	Lithium Backup Input	Direct connection point to DS9034PC+ PowerCap; electrically isolated until first V_CC application >4.25V
NC	No Connect	Pins 1, 2, 3, 33, and 34 are unassigned; no internal connection; must remain floating or grounded per layout guidelines

Key Features

Feature	Design Value
Automatic Power-Fail Response	Switches to lithium backup in ≤1.5 µs (t_PD) upon V_CC decay below V_TP, eliminating need for external supervisor ICs
Freshness Seal	Lithium cell remains electrically disconnected until first V_CC application >4.25V - preserves full 10-year retention capacity
Unlimited Write Cycles	No endurance limit on SRAM writes; eliminates wear-leveling firmware and erase-cycle constraints of Flash/EEPROM
Standardized PCM Interface	34-pin footprint and keyed mechanical design ensure repeatable, tool-free PowerCap attachment/detachment using a screwdriver
Industrial Voltage Margin	Operates reliably down to 4.75V and retains data through V_CC collapse to 3.0V - supports wide-input DC-DC converters

Applications

Industrial Data Logger	Telecom Base Station Config Storage
Use Scenario: Continuous logging of sensor readings and fault events in remote substations with intermittent grid power. IC Role / Device Role / Timing Role: Nonvolatile SRAM holding real-time operational parameters and last-known-good configuration during AC outages. Use Value: Guarantees 10-year data retention without battery replacement; eliminates Flash wear-out and EEPROM write delays.	Use Scenario: Storing radio calibration tables, neighbor-cell lists, and security keys in outdoor macrocell BTS units exposed to temperature extremes. IC Role / Device Role / Timing Role: Primary configuration memory with instant read/write access and fail-safe write protection during voltage sags. Use Value: Industrial –40°C to +85°C rating ensures reliability across climates; 70ns access enables fast boot and handover processing.
Medical Diagnostic Equipment	Programmable Logic Controller (PLC)
Use Scenario: Capturing patient ECG waveforms and diagnostic settings in portable ultrasound devices with battery backup. IC Role / Device Role / Timing Role: High-integrity buffer memory preserving waveform snapshots and calibration offsets during power transitions. Use Value: Automatic lithium switchover prevents data loss during hot-swap battery changes; no external backup controller needed.	Use Scenario: Retaining ladder logic state, I/O mapping, and alarm history in factory-floor PLCs subject to voltage dips and EMI. IC Role / Device Role / Timing Role: Nonvolatile working memory that maintains program execution context across unexpected power interruptions. Use Value: Write-protection activation at 4.5V prevents corrupted logic states; 524,288 × 8 organization matches common PLC memory map sizes.

Industrial Data Logger

Telecom Base Station Config Storage

Use Scenario: Continuous logging of sensor readings and fault events in remote substations with intermittent grid power.

IC Role / Device Role / Timing Role: Nonvolatile SRAM holding real-time operational parameters and last-known-good configuration during AC outages.

Use Value: Guarantees 10-year data retention without battery replacement; eliminates Flash wear-out and EEPROM write delays.

Use Scenario: Storing radio calibration tables, neighbor-cell lists, and security keys in outdoor macrocell BTS units exposed to temperature extremes.

IC Role / Device Role / Timing Role: Primary configuration memory with instant read/write access and fail-safe write protection during voltage sags.

Use Value: Industrial –40°C to +85°C rating ensures reliability across climates; 70ns access enables fast boot and handover processing.

Medical Diagnostic Equipment

Programmable Logic Controller (PLC)

Use Scenario: Capturing patient ECG waveforms and diagnostic settings in portable ultrasound devices with battery backup.

IC Role / Device Role / Timing Role: High-integrity buffer memory preserving waveform snapshots and calibration offsets during power transitions.

Use Value: Automatic lithium switchover prevents data loss during hot-swap battery changes; no external backup controller needed.

Use Scenario: Retaining ladder logic state, I/O mapping, and alarm history in factory-floor PLCs subject to voltage dips and EMI.

IC Role / Device Role / Timing Role: Nonvolatile working memory that maintains program execution context across unexpected power interruptions.

Use Value: Write-protection activation at 4.5V prevents corrupted logic states; 524,288 × 8 organization matches common PLC memory map sizes.

Equivalent & Alternatives

The following parts are listed as comparable options for similar nonvolatile SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
DS1250AB-70IND+	32-pin EDIP package; integrated lithium; no external PowerCap required	Suitable for through-hole or wave-soldered designs; not surface-mountable; lacks PCM modularity	Select when board assembly uses traditional DIP sockets or wave soldering, and modularity is not required.
STK15C88-70I	4 Mbit nvSRAM in 32-pin SOIC; 70ns access; 5V ±10%; industrial temp; no PCM option	Surface-mount only; fixed internal battery; no field-replaceable backup element	Select when PCB space is constrained and a compact SOIC footprint is preferred over modular serviceability.

Compared with DS1250AB-70IND+, the DS1250ABP-70IND+ offers field-serviceable lithium backup via snap-on PowerCap, while STK15C88-70I provides smaller SOIC packaging but forfeits battery replacement capability - making DS1250ABP-70IND+ optimal for long-lifecycle, maintenance-accessible deployments.

Availability

DS1250ABP-70IND+ is available at Aetrix Electronics and suitable for industrial data loggers, telecom base station configuration storage, and medical diagnostic equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for DS1250ABP-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 DS1250ABP-70IND+ belongs to Maxim's nonvolatile SRAM product line, engineered specifically for mission-critical data retention in environments where power instability, temperature extremes, and long service life are primary design constraints.

FAQ

What is the role of the DS9034PC+ PowerCap in the DS1250ABP-70IND+ system?

The DS9034PC+ PowerCap provides the lithium backup energy source for the DS1250ABP-70IND+. It snaps onto the 34-pin PCM base after reflow soldering, completing the nonvolatile function. The DS1250ABP-70IND+ itself contains only the SRAM and control logic - the DS9034PC+ supplies the battery and connects via VBAT and ground contacts. DS1250ABP-70IND+ cannot retain data without a properly attached DS9034PC+ or DS9034PCI+.

Does DS1250ABP-70IND+ require external circuitry for power-fail detection or write protection?

No. DS1250ABP-70IND+ includes fully integrated voltage monitoring and automatic write-protection logic. When V_CC falls below 4.50V, it unconditionally disables writes and switches to lithium backup within 1.5 µs - no external supervisor, capacitor, or resistor network is needed. DS1250ABP-70IND+ is a self-contained nonvolatile memory solution.

How does the "Freshness Seal" affect the 10-year data retention claim for DS1250ABP-70IND+?

The Freshness Seal keeps the lithium cell electrically disconnected until the user first applies V_CC > 4.25V, preserving full battery capacity. The 10-year retention period begins only after this initial power-up - not from shipment date. This ensures DS1250ABP-70IND+ delivers its rated retention even after extended shelf storage, as confirmed by Maxim's component-level qualification testing.

Can DS1250ABP-70IND+ be used in place of DS1250AB-70IND+ without PCB changes?

No. DS1250ABP-70IND+ uses a 34-pin PowerCap Module footprint, while DS1250AB-70IND+ uses a 32-pin EDIP package. Their land patterns, mounting methods (surface-mount vs. through-hole), and pinouts differ significantly. DS1250ABP-70IND+ requires dedicated PCM layout and mechanical clearance for PowerCap attachment - it is not a drop-in replacement for the DIP variant.

What is the maximum operating current of DS1250ABP-70IND+ during active read/write cycles?

The DS1250ABP-70IND+ draws up to 85 mA (I_CCO1) during active read or write operations at V_CC = 5V and T_A = +25°C. This value is specified across the full industrial temperature range and includes worst-case dynamic current for all address/data transitions. Standby current drops to ≤150 µA (I_CCS2) when CE is held high, enabling ultra-low-power retention modes.

DS1250ABP-70IND+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Package/Case:: 34-PowerCap™ Module

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Memory Type:: Non-Volatile

Memory Format:: NVSRAM

Technology:: NVSRAM (Non-Volatile SRAM)

Memory Size:: 4Mbit

Memory Organization:: 512K 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:: Surface Mount

Supplier Device Package:: 34-PowerCap Module

DS1250ABP-70IND+ FAQ

1.How can I place an order for DS1250ABP-70IND+ through Aetrix?

Please submit a Request for Quotation (RFQ) for DS1250ABP-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 DS1250ABP-70IND+ reliable?

The price and inventory of DS1250ABP-70IND+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DS1250ABP-70IND+ is usually 5 days.

3.What payment methods are accepted for DS1250ABP-70IND+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DS1250ABP-70IND+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for DS1250ABP-70IND+?

DS1250ABP-70IND+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your DS1250ABP-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 DS1250ABP-70IND+?

For technical support, including DS1250ABP-70IND+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DS1250ABP-70IND+ requirements.

6.How does Aetrix verify that DS1250ABP-70IND+ is sourced from the original manufacturer or authorized distributors?

All DS1250ABP-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 DS1250ABP-70IND+ meets industry standards.

7.What is the process for return or replacement of DS1250ABP-70IND+?

All DS1250ABP-70IND+ units undergo pre-shipment inspection (PSI). If there is an issue with DS1250ABP-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 DS1250ABP-70IND+ part is unused and in its original packaging.

Return procedure for DS1250ABP-70IND+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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