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See Technical Specifications

M48T58-70PC1

5.0 V, 64 Kbit (8 Kb x 8) TIMEKEEPER® SRAM

Manufacturer:

STMicroelectronics, Inc
Mfr.Part #:

M48T58-70PC1
Datasheet:

M48T58-70PC1 Datasheet (PDF)
feature-minimum-operating-supply-voltage-v:

4.75
feature-maximum-operating-supply-voltage-v:

5.5
feature-packaging:

Tube
feature-pin-count:

28
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M48T58-70PC1 General Description

The M48T58/Y TIMEKEEPER?RAM is a 8 Kb x 8 non-volatile static RAM and real-time clock. The monolithic chip is available in two special packages to provide a highly integrated battery-backed memory and real-time clock solution.The M48T58/Y is a non-volatile pin and function equivalent to any JEDEC standard 8b Kb x 8 SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the non-volatility of PROMs without any requirement for special WRITE timing or limitations on the number of WRITEs that can be performed.The 28-pin, 600 mil DIP CAPHAT?houses the M48T58/Y silicon with a quartz crystal and a long life lithium button cell in a single package.The 28-pin, 330 mil SOIC provides sockets with gold plated contacts at both ends for direct connection to a separate SNAPHAT?housing containing the battery and crystal. The unique design allows the SNAPHAT battery package to be mounted on top of the SOIC package after the completion of the surface mount process. Insertion of the SNAPHAT housing after reflow prevents potential battery and crystal damage due to the high temperatures required for device surface-mounting. The SNAPHAT housing is keyed to prevent reverse insertion. The SOIC and battery/crystal packages are shipped separately in plastic anti-static tubes or in tape & reel form.For the 28-lead SOIC, the battery/crystal package (e.g., SNAPHAT) part number is “M4T28-BR12SH”.

Key Features

Integrated, ultra low power SRAM, real-time clock, power-fail control circuit and battery
BYTEWIDE^?RAM-like clock access
BCD coded year, month, day, date, hours, minutes, and seconds
Frequency test output for real-time clock
Automatic power-fail chip deselect and WRITE protection
WRITE protect voltages (V_PFD= power-fail deselect voltage):
- M48T58: V_CC= 4.75 to 5.5 V; 4.5 V ≤ V_PFD≤ 4.75 V
- M48T58Y: V_CC= 4.5 to 5.5 V; 4.2 V ≤ V_PFD≤ 4.5 V
Self-contained battery and crystal in the CAPHAT^?DIP package
Packaging includes a 28-lead SOIC and SNAPHAT^?top (to be ordered separately)
SOIC package provides direct connection for a snaphat housing containing the battery and crystal
Pin and function compatible with JEDEC standard 8 Kb x 8 SRAMs
RoHS compliant
- Lead-free second level interconnect

Application

Embedded Systems: It is widely used in embedded systems and microcontroller-based applications to store configuration parameters, calibration data, and other critical information.
Data Loggers: NVSRAM is ideal for data loggers and recorders where data must be retained even if the device is powered off.
Industrial Control Systems: In industrial automation and control systems, this device can store control parameters, historical data, and system configurations.
Network Equipment: Routers, switches, and network equipment use NVSRAM to save routing tables, configurations, and system logs.
Medical Devices: Medical equipment benefits from NVSRAM for storing patient data, usage logs, and critical settings.
Telecommunications: It is used in telecommunication equipment for storing call logs, configuration data, and time-stamping.
Gaming Systems: Gaming consoles and machines use NVSRAM to store game progress and high scores.
Security Systems: Alarm panels, access control systems, and surveillance devices use NVSRAM to store event logs and configuration settings.
Aerospace and Avionics: NVSRAM is employed in avionics systems for data storage, event logging, and real-time clock functions.
Automotive Electronics: Some automotive systems may use NVSRAM for storing vehicle-specific data and configuration settings.

Specifications

feature-minimum-operating-supply-voltage-v	4.75	feature-maximum-operating-supply-voltage-v	5.5
feature-packaging	Tube	feature-rad-hard
feature-pin-count	28	feature-cecc-qualified	No
feature-esd-protection		feature-escc-qualified
feature-military	No	feature-aec-qualified	No
feature-auto-motive	No	feature-p-pap	No
feature-eccn-code	EAR99	feature-svhc
feature-svhc-exceeds-threshold	No