M48Z12 STMICROELECTRONICS | Alldatasheet
Document overview
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Technical content
Figure 1. 24-pin CAPHAT, DIP Package
Figure 4. Block Diagram Table 2. Absolute Maximum Ratings Note: 1. Soldering temperature not to exceed 260°C for 10 seconds (total thermal budget not to exceed 150°C for longer than 30 seconds). CAUTION: Negative undershoots below –0.3V are not allowed on any pin while in the Battery Back-up mode.
tions when using the quoted parameters. Table 3. Operating and AC Measurement Conditions Note: Output Hi-Z is defined as the point where data is no longer driven. Figure 5. AC Testing Load Circuit Table 4. Capacitance Note: 1. Effective capacitance measured with power supply at 5V. Sampled only, not 100% tested.
Table 5. DC Characteristics
- Negative spikes of –1V allowed for up to 10ns once per Cycle.
Table 6. Operating Modes Note: X = VIH or VIL; VSO = Battery Back-up Switchover Voltage.
- See Table 10, page 11 for details.
one of the 2,048 bytes of data is to be accessed. Figure 6. READ Mode AC Waveforms Note: WRITE Enable (W) = High. Table 7. READ Mode AC Characteristics
Table 8. WRITE Mode AC Characteristics
Table 9. Power Down/Up AC Characteristics
- VPFD (max) to VPFD (min) fall time of less than tF may result in deselection/write protection not occurring until 200µs after VCC pass-
- VPFD (min) to VSS fall time of less than tFB may cause corruption of RAM data.
Table 10. Power Down/Up Trip Points DC Characteristics Note: 1. All voltages referenced to VSS . Figure 11. Crystal Accuracy Across Temperature
VSS (cathode connected to VCC , anode to VSS ). Figure 12. Supply Voltage Protection
Figure 13. PCDIP24 – 24-pin Plastic DIP, Battery CAPHAT™, Package Outline Note: Drawing is not to scale. Table 11. PCDIP24 – 24-pin Plastic DIP, Battery CAPHAT™, Package Mechanical Data
Table 12. Ordering Information Scheme please contact the ST Sales Office nearest you.
M48Z02, M48Z12
REVISION HISTORY
Table 13. Document Revision History
M48Z02, M48Z12 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 registered trademark of STMicroelectronics All other names are the property of their respective owners. © 2003 STMicroelectronics - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.