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STMicroelectronics M48Z12-70PC1
- Part No.:
- M48Z12-70PC1
- Manufacturer:
- STMicroelectronics
- Category:
- Memory
- Package:
- 24-DIP Module (0.600", 15.24mm)
- Datasheet:
-
M48Z12-70PC1.pdf
- Description:
- IC NVSRAM 16KBIT PAR 24PCDIP
- Quantity:
- Payment:
- Shipping:
Inventory:172
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Product details
Overview
M48Z12-70PC1 from STMicroelectronics is a 5 V, 16 kbit (2 Kb × 8) non-volatile ZEROPOWER® SRAM with integrated lithium battery and power-fail detection circuitry in a 24-pin CAPHAT™ DIP package. It delivers 70 ns read/write cycle time, automatic write protection below VPFD (4.2–4.5 V), and guaranteed 10-year data retention in battery backup mode across 0–70 °C. Used in industrial control panels for real-time configuration storage during AC mains loss.
For engineers reviewing the M48Z12-70PC1 datasheet, M48Z12-70PC1 pinout, M48Z12-70PC1 application, or M48Z12-70PC1 equivalent, this page provides verified timing parameters, JEDEC 2K×8 SRAM compatibility details, battery switchover behavior (VSO = 3.0 V), and functional substitution guidance against legacy DS1220-based designs.
Technical Context
The M48Z12-70PC1 integrates a 2 K × 8 static RAM array, voltage-sensing circuitry, and a sealed lithium button cell within a single CAPHAT™ DIP package. Its power-fail detection triggers write protection when VCC drops into the 4.2–4.5 V window (VPFD), then switches to battery backup at ≤3.0 V (VSO).
It operates in three distinct modes: active SRAM (VCC ≥4.5 V), power-fail deselect (4.2 V ≤ VCC <4.5 V), and battery-retention (VCC ≤3.0 V). The BOK (Battery OK) flag is latched on power-up and blocks first write until cleared-ensuring data integrity verification before volatile operation resumes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 16 kbit (2 K × 8) - supports byte-wide addressing without external multiplexing |
| Access time | 70 ns - enables direct interface with 14 MHz microcontrollers without wait states |
| VCC operating range | 4.5–5.5 V - compatible with standard 5 V TTL/CMOS logic rails and tolerates ±10% supply variation |
| VPFD range | 4.2–4.5 V - initiates automatic write protection before brownout-induced corruption occurs |
| VSO voltage | 3.0 V - precise battery switchover threshold ensures seamless transition with no data gap |
| Data retention | ≥10 years - achieved via internal lithium cell (carbon monofluoride chemistry) with zero self-discharge monitoring |
| Operating temperature | 0–70 °C - validated for commercial-grade embedded systems including PLCs and HMI modules |
Pinout & Package
Package: 24-pin PDIP (CAPHAT™), 600 mil width, with integrated lithium battery housed beneath the IC body per ST's mechanical drawing PDIP24.7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A10 | Address inputs | 11-bit address bus supporting full 2 Kbyte address space; TTL/CMOS compatible |
| DQ0–DQ7 | Data I/O | Bi-directional 8-bit data bus with three-state outputs controlled by E and G |
| E | Chip enable | Active-low chip select; high-Z output when VIH, enabling multi-chip memory expansion |
| G | Output enable | Active-low output control; allows shared bus operation without contention during writes |
| W | Write enable | Active-low write strobe; falling edge initiates write cycle synchronized with E |
| VCC | Supply voltage | Primary 5 V power input; monitored continuously for VPFD/VSO thresholds |
| VSS | Ground | System reference node; must be decoupled with 0.1 µF ceramic capacitor per datasheet Figure 8 |
Key Features
| Feature | Design Value |
|---|---|
| Integrated CAPHAT™ package | Single-component solution eliminates discrete battery holder, PCB space, and solder joint reliability risks |
| Unlimited write cycles | Eliminates EEPROM wear-out concerns in frequently updated configuration registers |
| Read = Write cycle time | Simplifies timing design-no separate write-strobe delay logic required in MCU firmware |
| Automatic power-fail deselect | Hardware-enforced write protection prevents partial writes during brownout without software intervention |
| BOK flag monitoring | Enables system-level battery health check at boot-blocks writes until confirmed healthy |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data Retention |
|---|---|
|
Use Scenario: Storing user-defined I/O mapping and alarm thresholds in programmable logic controllers during factory power interruptions. IC Role / Device Role / Timing Role: Non-volatile SRAM providing immediate-access configuration memory with zero-latency read/write and automatic brownout protection. Use Value: Maintains operational state across 10+ years without refresh, eliminating need for external EEPROM write-cycle management or backup capacitors. |
Use Scenario: Preserving sensor calibration coefficients and patient history logs in portable diagnostic equipment during battery swaps. IC Role / Device Role / Timing Role: Battery-backed memory ensuring data persistence through hot-swap events where main power drops below 4.2 V for <100 ms. Use Value: Guarantees calibration integrity without requiring host MCU to execute save routines-critical for FDA-compliant audit trails. |
| Point-of-Sale Terminal Settings | Energy Meter Firmware Parameters |
|
Use Scenario: Holding tax rate tables, receipt formatting rules, and operator PINs in retail terminals subject to frequent unplanned outages. IC Role / Device Role / Timing Role: JEDEC-compatible SRAM acting as drop-in replacement for DS1220 sockets while adding built-in battery and VPFD logic. Use Value: Reduces BOM count by 3 components (SRAM + battery + supervisor IC) and eliminates manual battery replacement service calls. |
Use Scenario: Securing tariff schedules, pulse-count offsets, and communication keys in smart electricity meters deployed in grid-edge environments. IC Role / Device Role / Timing Role: Long-life data vault maintaining regulatory-critical parameters during extended grid failures (>72 hours). Use Value: Meets IEC 62056-21 data retention requirements with 10-year battery life-verified under accelerated aging tests per AN1012. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar non-volatile SRAM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DS1220Y | Discrete 2K×8 SRAM + external lithium battery; no integrated VPFD circuit or BOK flag | Requires external power-fail supervisor IC and battery holder; higher assembly cost and larger footprint | Select when legacy socket compatibility is mandatory and board space permits discrete implementation |
| M48Z12-70PC1T | Tape-and-reel variant of same die; identical electrical specs and CAPHAT™ package construction | Optimized for automated SMT placement; same pinout and thermal profile as tube-packaged M48Z12-70PC1 | Select for high-volume production lines requiring machine-readable packaging and moisture-sensitive device handling |
Compared with DS1220Y, M48Z12-70PC1 reduces system-level validation effort by integrating power monitoring and battery management; compared with M48Z12-70PC1T, the tube version offers lower MOQ flexibility for prototyping and low-volume industrial builds.
Availability
M48Z12-70PC1 is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, point-of-sale terminals, and smart energy meters requiring stable component supply with long-term lifecycle assurance.
Supply support for M48Z12-70PC1 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 analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.
The M48Z12 belongs to ST's ZEROPOWER® SRAM product line, engineered specifically for mission-critical data retention in infrastructure systems where power reliability cannot be assumed-and where replacing batteries in deployed field equipment is impractical or prohibited.
FAQ
What is the guaranteed data retention period for M48Z12-70PC1 in battery backup mode?
The M48Z12-70PC1 guarantees ≥10 years of data retention in battery backup mode at 0–70 °C, based on accelerated life testing of its encapsulated lithium carbon monofluoride cell per application note AN1012. This rating assumes VCC remains ≤3.0 V and ambient temperature stays within specification limits-no periodic refresh or external power is required.
How does the BOK (Battery OK) flag function during power-up?
At power-up, the M48Z12-70PC1 samples battery voltage and sets the BOK flag if it falls below threshold. When set, the first attempted WRITE is blocked until data is written-this action clears the flag and resumes normal operation. The flag status is not directly readable but is inferred by observing write success/failure behavior per Figure 7 in the datasheet.
Can M48Z12-70PC1 replace DS1220 in existing sockets without modification?
Yes-M48Z12-70PC1 is pin- and function-compatible with JEDEC-standard 2 K × 8 SRAMs including DS1220, using identical 24-pin DIP layout and signal definitions (A0–A10, DQ0–DQ7, E, G, W, VCC, VSS). No PCB redesign or firmware changes are needed beyond verifying VCC tolerance (4.5–5.5 V vs. DS1220's 4.75–5.5 V).
What protection is recommended against VCC negative transients during battery backup mode?
ST recommends placing a Schottky diode (cathode to VCC, anode to VSS) to clamp negative spikes below –0.3 V-exposure to undershoots beyond this level risks data corruption in battery mode. The 1N5817 (through-hole) or MBRS120T3 (SMD) are validated solutions per Section 3.4 of the datasheet, used alongside a 0.1 µF ceramic bypass capacitor.
M48Z12-70PC1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 24-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:
- 16Kbit
- Memory Organization:
- 2K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 70ns
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 24-PCDIP, CAPHAT®
M48Z12-70PC1 FAQ
1.How can I place an order for M48Z12-70PC1 through Aetrix?
Please submit a Request for Quotation (RFQ) for M48Z12-70PC1 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 M48Z12-70PC1 reliable?
The price and inventory of M48Z12-70PC1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for M48Z12-70PC1 is usually 5 days.
3.What payment methods are accepted for M48Z12-70PC1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for M48Z12-70PC1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for M48Z12-70PC1?
M48Z12-70PC1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your M48Z12-70PC1 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 M48Z12-70PC1?
For technical support, including M48Z12-70PC1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your M48Z12-70PC1 requirements.
6.How does Aetrix verify that M48Z12-70PC1 is sourced from the original manufacturer or authorized distributors?
All M48Z12-70PC1 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 M48Z12-70PC1 meets industry standards.
7.What is the process for return or replacement of M48Z12-70PC1?
All M48Z12-70PC1 units undergo pre-shipment inspection (PSI). If there is an issue with M48Z12-70PC1, 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 M48Z12-70PC1 part is unused and in its original packaging.
Return procedure for M48Z12-70PC1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
M48Z12-70PC1 Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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