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| M48Z129Y M48Z129V 1 Mbit (128Kb x8) ZEROPOWER(R) SRAM PRELIMINARY DATA INTEGRATED LOW POWER SRAM, POWER-FAIL CONTROL CIRCUIT and BATTERY CONVENTIONAL SRAM OPERATION; UNLIMITED WRITE CYCLES 10 YEARS of DATA RETENTION in the ABSENCE of POWER MICROPROCESSOR POWER-ON RESET (Valid even during battery back-up mode) BATTERY LOW PIN PROVIDES EARLY WARNING of BATTERY END-OF-LIFE AUTOMATIC POWER-FAIL CHIP DESELECT and WRITE PROTECTION WRITE PROTECT VOLTAGE (VPFD = Power-fail Deselect Voltage): - M48Z129Y: 4.20V VPFD 4.50V - M48Z129V: 2.70V VPFD 3.00V BATTERY INTERNALLY ISOLATED UNTIL POWER IS APPLIED COMPATIBLE with STANDARD 128Kx8 SRAMs 32 1 PMDIP32 (PM) Module Figure 1. Logic Diagram DESCRIPTION The M48Z129Y/129V ZEROPOWER(R) RAM is a non-volatile 1,048,576 bit Static RAM organized as 131,072 words by 8 bits. The devices combines an internal lithium battery, a CMOS SRAM and a control circuit in a plastic 32 pin DIP Module. A Battery Low (BL) pin warns the user of battery end-of-life, providing true data non-volatility. The open-drain Reset (RST) output pin is used to provide a reset pulse, insuring proper system operation. Due to the ultra-low power required by the M48Z129Y/129V, nominal battery life exceeds 10 years, thus outlasting the useful lifetime of most end-user equipment. VCC 17 A0-A16 8 DQ0-DQ7 W E G M48Z129Y M48Z129V RST BL VSS AI02309 May 1999 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. 1/4 M48Z129Y, M48Z129V 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 STMicroelectronics Sales Office nearest to you. Example: 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 M48Z129Y 25 9 M48Z129V 24 23 10 22 11 21 12 20 13 19 14 18 15 17 16 AI02310 M48Z129Y -70 PM 1 VCC A15 BL W A13 A8 A9 A11 G A10 E DQ7 DQ6 DQ5 DQ4 DQ3 Supply Voltage and Write Protect Voltage 129Y 129V VCC = 4.5V to 5.5V VPFD = 4.2V to 4.5V VCC = 3.0V to 3.6V VPFD = 2.7V to 3.0V Speed -70 70ns Package PM PMDIP32 Temperature Range 1 0 to 70 C Signal Names A0-A16 DQ0-DQ7 E G W RST BL VCC VSS Address Inputs Data Inputs / Outputs Chip Enable Output Enable Write Enable Reset Output (Open Drain) Battery Low Output Supply Voltage Ground 2/4 M48Z129Y, M48Z129V PMDIP32 - 32 pin Plastic DIP Module Symb Typ A A1 B C D E e1 e3 eA L S N mm Min 9.27 0.38 0.43 0.20 42.42 18.03 2.29 34.29 14.99 3.05 1.91 32 Max 9.52 - 0.59 0.33 43.18 18.80 2.79 41.91 16.00 3.81 2.79 Typ inches Min 0.365 0.015 0.017 0.008 1.670 0.710 0.090 1.350 0.590 0.120 0.075 32 Max 0.375 - 0.023 0.013 1.700 0.740 0.110 1.650 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 M48Z129Y, M48Z129V Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 1999 STMicroelectronics - All Rights Reserved All other names are the property of their respective owners STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 4/4 |
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