Details, datasheet, quote on part number: M48T58Y-70MH1
PartM48T58Y-70MH1
Category
Description64 Kbit (8KB X 8) Timekeeper SRAM
CompanyST Microelectronics, Inc.
DatasheetDownload M48T58Y-70MH1 datasheet
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Features, Applications

FEATURES SUMMARY s INTEGRATED, ULTRA LOW POWER SRAM, REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT and BATTERY

BYTEWIDETM 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 (VPFD = Power-fail Deselect Voltage): ­ M48T58: VCC 5.5V 4.5V VPFD ­ M48T58Y: VCC 5.5V 4.2V VPFD 4.5V SELF-CONTAINED BATTERY and CRYSTAL IN THE CAPHATTM 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 x 8 SRAMs

TABLE OF CONTENTS SUMMARY DESCRIPTION. 4 Logic Diagram (Figure 3.). 4 Signal Names (Table 1.). 4 DIP Connections (Figure 4.). 5 SOIC Connections (Figure 5.). 5 Block Diagram (Figure 6.). 5 MAXIMUM RATING. 6 Absolute Maximum Ratings (Table 6 DC AND AC PARAMETERS. 7 Operating and AC Measurement Conditions (Table 7 AC Measurement Load Circuit (Figure 7.). 7 Capacitance (Table 7 DC Characteristics (Table 5.). 8 OPERATION MODES. 9 Operating Modes (Table 6.). 9 READ Mode. 10 READ Mode AC Waveforms (Figure 8.). 10 READ Mode AC Characteristics (Table 7.). 11 WRITE Mode. 12 WRITE Enable Controlled, WRITE AC Waveform (Figure 9.). 12 Chip Enable Controlled, WRITE AC Waveforms (Figure 10.). 13 WRITE Mode AC Characteristics (Table 8.). 14 Data Retention Mode. 15 Power Down/Up Mode AC Waveforms (Figure 11.). 15 Power Down/Up AC Characteristics (Table 9.). 16 Power Down/Up Trip Points DC Characteristics (Table 10.). 16

CLOCK OPERATIONS. 17 Reading the Clock. 17 Register Map (Table 11.). 17 Setting the Clock. 17 Stopping and Starting the Oscillator. 17 Calibrating the Clock. 18 Battery Low Flag. 19 Century Bit. 19 Crystal Accuracy Across Temperature (Figure 12.). 19 Clock Calibration (Figure 13.). 20 Power Supply Decoupling and Undershoot Protection. 20 Supply Voltage Protection (Figure 14.). 20 PART NUMBERING. 21 SNAPHAT Battery Table (Table 13.). 21 PACKAGE MECHANICAL INFORMATION. 22 REVISION HISTORY. 26


 

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