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| M48T129Y M48T129V 3.3V-5V 1 Mb (128K x 8) TIMEKEEPER(R) SRAM PRELIMINARY DATA INTEGRATED ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT, BATTERY and CRYSTAL YEAR 2000 COMPLIANT BCD CODED YEAR, MONTH, DAY, DATE, HOURS, MINUTES and SECONDS BATTERY LOW WARNING FLAG AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION WRITE PROTECT VOLTAGES (VPFD = Power-fail Deselect Voltage): - M48T129Y: 4.20V VPFD 4.50V - M48T129V: 2.70V VPFD 3.00V CONVENTIONAL SRAM OPERATION; UNLIMITED WRITE CYCLES SOFTWARE CONTROLLED CLOCK CALIBRATION for HIGH ACCURACY APPLICATIONS 10 YEARS of DATA RETENTION and CLOCK OPERATION in the ABSENCE of POWER SELF-CONTAINED BATTERY and CRYSTAL in DIP PACKAGE MICROPROCESSOR POWER-ON RESET (Valid even during battery back-up mode) PROGRAMMABLE ALARM OUTPUT ACTIVE in the BATTERY BACK-UP MODE DESCRIPTION The M48T129Y/129V TIMEKEEPER(R) RAM is a non-volatile 1,048,576 bit static RAM and real time clock organized as 131,072 words by 8 bits. System integration features include Programmable Alarms, Battery Low status Flag and a Power-on Reset. The special 32-pin DIP package provides a highly integrated battery back-up memory and real time clock solution. The memory locations providing user accessible BYTEWIDETM clock information are in the bytes with addresses 7FF1h and 7FF9h-1FFFh. These clock locations contain the century, year, month, date, day, hour, minute and second in 24 hour BCD format. Corrections for 28, 29 (leap year, including year 2000), 30, and 31 day months are made automatically. Reference the M48T201 data sheet for complete register map. February 1998 32 1 PMDIP32 (PM) Module Logic Diagram VCC 17 A0-A16 W E G M48T129Y M48T129V 8 DQ0-DQ7 RST IRQ/FT VSS AI02260 1/4 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. M48T129Y, M48T129V DIP Pin Connections Ordering Information Scheme For a list of available options or for further information on any aspect of this device, please contact the SGS-THOMSON Sales Office nearest to you. Example: M48T129Y -70 PM 1 RST A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 VSS 32 1 31 2 30 3 29 4 28 5 27 6 26 7 8 M48T129Y 25 9 M48T129V 24 23 10 22 11 21 12 20 13 19 14 18 15 17 16 AI02261 VCC A15 IRQ/FT W A13 A8 A9 A11 G A10 E DQ7 DQ6 DQ5 DQ4 DQ3 Supply Voltage and Write Protect Voltage 129Y VCC = 4.50V to 5.50V VPFD = 4.20V to 4.50V 129V VCC = 3.00V to 3.60V VPFD = 2.70V to 3.00V Speed -70 -85 70ns (M48T129Y) 85ns (M48T129V) Package PM PMDIP32 Temperature Range Signal Names A0-A16 DQ0-DQ7 E G W RST IRQ/FT VCC VSS Address Inputs Data Inputs / Outputs Chip Enable Input Output Enable Input Write Enable Input Reset Output (open drain) Interrupt / Frequency Test Output (open drain) Supply Voltage Ground 1 0 to 70 C 2/4 M48T129Y, M48T129V PMDIP32 - 32 pin Plastic DIP Module Symb Typ A A1 B C D E e1 e3 eA L S N PMDIP32 mm Min 9.27 0.38 0.43 0.20 42.42 18.03 2.30 34.43 14.99 3.05 1.91 32 Max 9.52 - 0.59 0.33 43.18 18.80 2.81 42.08 16.00 3.81 2.79 Typ inches Min 0.365 0.015 0.017 0.008 1.670 0.710 0.090 1.355 0.590 0.120 0.075 32 Max 0.375 - 0.023 0.013 1.700 0.740 0.110 1.656 0.630 0.150 0.110 A A1 S B e3 D e1 L eA C N E 1 PMDIP Drawing is not to scale. 3/4 M48T129Y, M48T129V Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1998 SGS-THOMSON Microelectronics - All Rights Reserved (R) TIMEKEEPER is a registered trademark of SGS-THOMSON Microelectronics TM BYTEWIDE is a trademark of SGS-THOMSON Microelectronics SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 4/4 |
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