Product Summary

The M48T129Y-70PM1 is a timekeeper RAM. The M48T129Y-70PM1 is a 128Kb × 8 non-volatile static RAM and real time clock, with programmable alarms and a watchdog timer. The special DIP package provides a fully integrated battery back-up memory and real time clock solution. The M48T129Y-70PM1 directly replaces industry standard 128Kb x 8 SRAM. It also provides the non-volatility of Flash without any requirement for special write timing or limitations on the number of writes that can be performed. For surface mount environments ST provides a Chip Set solution consisting of a 44 pin 330mil SOIC timekeeper Supervisor package.

Parametrics

M48T129Y-70PM1 absolute maximum ratings: (1)Ambient Operating Temperature, TA: 0 to 70℃; (2)Storage Temperature (VCC Off, Oscillator Off), TSTG: -40 to 85℃; (3)Input or Output Voltages, VIO: -0.3 to VCC +0.3 V; (4)Supply Voltage, VCC: -0.3 to 7.0 V; (5)Output Current, IO: 20 mA; (6)Power Dissipation, PD: 1 W.

Features

M48T129Y-70PM1 features: (1)Integrated ultra low power sram, real time clock, power-fail control circuit, battery and crystal; (2)Year 2000 compliant; (3)BCD coded century, year, month, day, date, hours, minutes, and; (4)seconds; (5)BAttery low warning flag; (6)Automatic power-fail chip deselect and write protection; (7)Two write protect voltages: (VPFD = Power-fail Deselect Voltage): 4.2V 3 VPFD 3 4.5V; (8)Conventional sram operation; unlimited write cycles; (9)Software controlled clock calibration for high accuracy applications; (10)10 years of data retention and clock operation in the absence of power; (11)Self contained battery and crystal in dip package; (12)Microprocessor power-on reset (Valid even during battery back-up mode); (13)Programmable alarm output active in battery back-up mode; (14)Surface mount chip set packaging includes a 44-PIN SOIC and a 32-LEAD TSOP (snaphat top to be ordered separately); (15)SOIC package provides direct connection for a snaphat top which; (16)contains the battery and crystal; (17)Snaphat[ housing (battery/crystal) is replaceable.

Diagrams

M48T129Y-70PM1 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
M48T129Y-70PM1
M48T129Y-70PM1

STMicroelectronics

Real Time Clock 1M (128Kx8) 70ns

Data Sheet

Negotiable 
Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
M48T02
M48T02

Other


Data Sheet

Negotiable 
M48T02-150PC1
M48T02-150PC1

STMicroelectronics

Real Time Clock 16K (2Kx8) 150ns

Data Sheet

0-1: $6.59
1-10: $6.04
10-100: $5.81
100-250: $5.58
M48T02-200PC1
M48T02-200PC1

STMicroelectronics

Real Time Clock 16K (2Kx8) 200ns

Data Sheet

Negotiable 
M48T02-70PC1
M48T02-70PC1

STMicroelectronics

Real Time Clock 16K (2Kx8) 70ns

Data Sheet

0-1: $6.59
1-10: $6.04
10-100: $5.81
100-250: $5.58
M48T08
M48T08

Other


Data Sheet

Negotiable 
M48T08-100PC1
M48T08-100PC1

STMicroelectronics

Real Time Clock 64K (8Kx8) 100ns

Data Sheet

0-1: $9.89
1-10: $8.61
10-100: $7.78
100-250: $7.10