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Home > Products > Integrated Circuits (ICs) > Memory > Memory

STMicroelectronics M48Z58-70PC1

Name: M48Z58-70PC1
Brand: STMicroelectronics
SKU: M48Z58-70PC1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: M48Z58-70PC1

Manufacturer:: STMicroelectronics

Category:: Memory

Package:: 28-DIP Module (0.600", 15.24mm)

Datasheet:: M48Z58-70PC1.pdf

Description:: IC NVSRAM 64KBIT PAR 28PCDIP

Quantity:: RFQ Add To RFQ list

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Inventory:1,661

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Product details

Overview

M48Z58-70PC1 from STMicroelectronics is a 64 kbit (8 k × 8) non-volatile ZEROPOWER® SRAM with integrated lithium battery, power-fail detection, and automatic write protection. It operates at 4.75–5.5 V, features 70 ns read/write cycle time, and retains data for ≥10 years on internal battery during power loss. Used in industrial control panels, utility metering, and real-time clock backup systems where data persistence across AC outages is critical.

For engineers reviewing the M48Z58-70PC1 datasheet, M48Z58-70PC1 pinout, M48Z58-70PC1 application, or M48Z58-70PC1 equivalent, key selection considerations include VPFD voltage window (4.5–4.75 V), CAPHAT™ DIP-28 mechanical integration, battery-backed data retention without external circuitry, and JEDEC-compatible 8 k × 8 SRAM interface timing.

Technical Context

The M48Z58-70PC1 integrates SRAM array, voltage-sense switching circuitry, and lithium cell into a monolithic die within a CAPHAT™ DIP-28 package. Its power-fail logic monitors VCC continuously and initiates chip deselect and write protection when voltage falls between VPFD(min) = 4.5 V and VPFD(max) = 4.75 V.

Upon crossing VSO = 3.0 V, the internal circuit switches to battery power, maintaining CMOS-compatible I/O states and preserving full 8 k × 8 memory contents. The device supports standard TTL/CMOS input thresholds and delivers 70 ns access with tELQV = 70 ns and tGLQV = 35 ns under 0–70 °C operation.

Key Specifications

Parameter	Value and Actual Design Meaning
Memory size	64 kbit (8 k × 8) - provides byte-wide non-volatile storage compatible with legacy SRAM sockets
Access time	70 ns - ensures compatibility with 14 MHz bus systems without wait states
VCC range	4.75–5.5 V - matches standard +5 V logic rails and tolerates typical supply ripple
VPFD window	4.5–4.75 V - triggers deterministic write protection before data corruption occurs during brownout
Data retention	≥10 years on internal battery - eliminates need for external backup power design or periodic refresh
Package	PDIP-28 CAPHAT™ - integrates lithium cell and SRAM in single through-hole footprint, no secondary assembly required
Operating temp	0 to 70 °C - validated for commercial/industrial environments including metering and PLC backplanes

Pinout & Package

Package: 28-pin plastic DIP (PDIP-28.7) with integrated CAPHAT™ battery housing. Dimensions: 39.37 mm × 17.83 mm × 9.27 mm (L × W × H), 600-mil width, 0.100" lead pitch.

Pin/Terminal	Circuit Role	Design Meaning
A0–A12	Address inputs	13-bit address bus supporting full 8 kbyte addressing; compatible with JEDEC-standard 8 k × 8 SRAMs
DQ0–DQ7	Data I/O	Bi-directional 8-bit data bus with three-state outputs controlled by E and G; supports direct ROM/EPROM socket replacement
E	Chip enable	Active-low enable; asserts memory access only when low; high-Z output when high or during power-fail deselect
G	Output enable	Active-low output control; decouples data bus from system when high, preventing contention during WRITE cycles
W	Write enable	Active-low WRITE control; falling edge initiates WRITE; rising edge terminates; must be held stable during tWHAX (0 ns min)
VCC	Supply voltage	+5 V nominal input; powers SRAM and control logic; monitored for VPFD and VSO thresholds
VSS	Ground	Reference return path for all signals and internal battery circuitry; requires low-impedance connection
NC	No connect	Pins 15 and 28 are internally unconnected; must remain floating or tied to VSS per layout guidelines

Key Features

Feature	Design Value
Integrated CAPHAT™ battery	Self-contained 48 mAh lithium cell in same DIP package-eliminates external battery holder, wiring, and mounting complexity
Automatic power-fail response	Hardware-level VPFD detection and chip deselect within 200 µs-no firmware or external supervisor IC required
JEDEC pin/function compatibility	Direct drop-in replacement for standard 8 k × 8 SRAMs (e.g., HM6264, IS61LV256AL)-no PCB redesign needed
Zero-power retention mode	Draws <1 µA in battery backup-enables decade-long data hold without system-level power management overhead
Robust noise immunity	Specified tF = 300 µs minimum VCC fall time tolerance-prevents false triggers from transient spikes when paired with 0.1 µF ceramic bypass

Applications

Utility Smart Meter Data Logging

Industrial PLC Configuration Storage

Use Scenario: Captures tariff, consumption, and event timestamps during grid outages lasting minutes to hours.

IC Role / Device Role / Timing Role: Non-volatile RAM backing real-time clock and metering registers; maintains integrity across repeated brownouts.

Use Value: Guarantees regulatory-compliant data continuity without external supercapacitors or backup controllers-reduces BOM count by 3+ components.

Use Scenario: Stores ladder logic parameters, I/O mapping, and calibration coefficients in factory automation controllers.

IC Role / Device Role / Timing Role: Configuration memory that survives main power cycling and firmware updates without data loss.

Use Value: Enables zero-downtime commissioning and field reconfiguration-eliminates manual EEPROM programming steps during maintenance.

Medical Device Event History Buffer

Point-of-Sale Transaction Backup

Use Scenario: Records alarm triggers, sensor anomalies, and operator actions in infusion pumps and diagnostic equipment.

IC Role / Device Role / Timing Role: Fail-safe memory buffer synchronized to safety-critical interrupt handlers; immune to VCC droop during battery swaps.

Use Value: Meets IEC 62304 Class C software requirements for persistent fault logging-no external watchdog or backup power validation needed.

Use Scenario: Holds last completed transaction and session state in retail terminals during unexpected AC loss or battery depletion.

IC Role / Device Role / Timing Role: Atomic write-protected memory ensuring PCI-DSS compliant transaction rollback and reconciliation.

Use Value: Prevents financial data loss or duplication-avoids chargeback disputes and manual ledger reconciliation after power recovery.

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery-backed SRAM applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ST M48Z58Y-70PC1	Wider VCC range (4.5–5.5 V) and lower VPFD window (4.2–4.5 V); identical pinout and retention	Better suited for systems with looser +5 V regulation or wider input tolerance requirements	Select when main supply may dip below 4.75 V during normal operation but still requires guaranteed fail-safe behavior
Maxim DS1248	512 kbit (64 k × 8), 100 ns access, separate battery compartment; requires external capacitor and layout isolation	Higher density for extended log buffers; not pin-compatible-requires PCB redesign and thermal management for battery	Choose only when >64 kbit capacity is mandatory and board space allows SNAPHAT® top integration or discrete battery placement

Compared with M48Z58Y-70PC1, the -70PC1 offers tighter VPFD alignment with legacy +5 V rails, while DS1248 trades pin compatibility for higher density and longer retention-but adds design complexity, cost, and qualification effort.

Availability

M48Z58-70PC1 is available at Aetrix Electronics and suitable for utility metering, industrial PLCs, medical device event logging, and point-of-sale transaction backup requiring stable component supply across multi-year production cycles.

Supply support for M48Z58-70PC1 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, analog ICs, power management, and memory solutions for industrial, automotive, and consumer markets.

The ZEROPOWER® SRAM product line targets mission-critical data retention in infrastructure systems where external backup power is impractical-delivering integrated, drop-in non-volatility with minimal system-level design impact.

FAQ

What is the expected battery lifetime in the M48Z58-70PC1 under continuous backup conditions?

The integrated lithium button cell provides ≥10 years of data retention at 25 °C when VCC remains below VSO = 3.0 V. This rating assumes typical storage conditions and accounts for self-discharge; actual field life may extend beyond 12 years in cooler ambient environments (<40 °C). Battery capacity is not user-replaceable.

Can the M48Z58-70PC1 be used in surface-mount designs?

No-the M48Z58-70PC1 is exclusively offered in the through-hole PDIP-28 CAPHAT™ package. For surface-mount applications, ST provides the SOH28 variant (e.g., M48Z58Y-70MH1F) with separate SNAPHAT® battery top, but that part requires additional assembly steps and is not pin-equivalent to the -70PC1.

Does the device require external decoupling capacitors?

Yes-a 0.1 µF ceramic capacitor placed as close as possible to the VCC and VSS pins is mandatory. This suppresses high-frequency transients that could trigger false power-fail detection or corrupt data during battery switchover, as specified in Section 3.4 of the datasheet.

Is the M48Z58-70PC1 RoHS compliant and lead-free?

Yes-the M48Z58-70PC1 meets RoHS Directive 2011/65/EU and features lead-free second-level interconnects. The CAPHAT™ package uses Pb-free solder terminations and complies with ST's ECOPACK2 environmental standard, documented in Section 6 of the datasheet.

M48Z58-70PC1 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

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:: 64Kbit

Memory Organization:: 8K x 8

Memory Interface:: Parallel

Clock Frequency:: -

Write Cycle Time - Word, Page:: 70ns

Access Time:: 70 ns

Voltage - Supply:: 4.75V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 28-PCDIP, CAPHAT®

M48Z58-70PC1 FAQ

1.How can I place an order for M48Z58-70PC1 through Aetrix?

Please submit a Request for Quotation (RFQ) for M48Z58-70PC1 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 M48Z58-70PC1 reliable?

The price and inventory of M48Z58-70PC1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M48Z58-70PC1 is usually 5 days.

3.What payment methods are accepted for M48Z58-70PC1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M48Z58-70PC1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for M48Z58-70PC1?

M48Z58-70PC1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your M48Z58-70PC1 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 M48Z58-70PC1?

For technical support, including M48Z58-70PC1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M48Z58-70PC1 requirements.

6.How does Aetrix verify that M48Z58-70PC1 is sourced from the original manufacturer or authorized distributors?

All M48Z58-70PC1 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 M48Z58-70PC1 meets industry standards.

7.What is the process for return or replacement of M48Z58-70PC1?

All M48Z58-70PC1 units undergo pre-shipment inspection (PSI). If there is an issue with M48Z58-70PC1, 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 M48Z58-70PC1 part is unused and in its original packaging.

Return procedure for M48Z58-70PC1:

1.Submit a request within 90 days.

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

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