M40Z300MH1TR 查看數據表（PDF） - STMicroelectronics

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M40Z300MH1TR

5V or 3V NVRAM Supervisor for Up to 8 LPSRAMs

STMicroelectronics 

M40Z300

M40Z300W

5V or 3V NVRAM Supervisor for Up to 8 LPSRAMs

FEATURES SUMMARY

■ CONVERTS LOW POWER SRAM INTO

NVRAMs

■ PRECISION POWER MONITORING AND

POWER SWITCHING CIRCUITRY

■ AUTOMATIC WRITE-PROTECTION WHEN

VCC IS OUT-OF-TOLERANCE

■ TWO-INPUT DECODER ALLOWS

CONTROL FOR UP TO 8 SRAMs (with 2

devices active in parallel)

■ CHOICE OF SUPPLY VOLTAGES AND

POWER-FAIL DESELECT VOLTAGES:

– M40Z300:

VCC = 4.5V to 5.5V

THS = VSS: 4.5V ≤ VPFD ≤ 4.75V

THS = VOUT: 4.2V ≤ VPFD ≤ 4.5V

– M40Z300W:

VCC = 3.0V to 3.6V

THS = VSS: 2.8V ≤ VPFD ≤ 3.0V

VCC = 2.7V to 3.3V

THS = VOUT: 2.5 ≤ VPFD ≤ 2.7V

■ RESET OUTPUT (RST) FOR POWER ON

RESET

■ BATTERY LOW PIN (BL)

■ LESS THAN 12ns CHIP ENABLE ACCESS

PROPAGATION DELAY (for 5.0V device)

■ PACKAGING INCLUDES A 28-LEAD SOIC

AND SNAPHAT® TOP (to be ordered

separately), OR A 16-LEAD SOIC

■ SOIC PACKAGE PROVIDES DIRECT

CONNECTION FOR A SNAPHAT TOP

WHICH CONTAINS THE BATTERY

Figure 1. 16-pin SOIC Package

16

1

SO16 (MQ)

Figure 2. 28-pin SOIC Package

SNAPHAT (SH)

Crystal/Battery

28

1

SOH28 (MH)

February 2005

1/21

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