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M48Z512ASH View Datasheet(PDF) - STMicroelectronics

Part Name
Description
Manufacturer
M48Z512ASH
ST-Microelectronics
STMicroelectronics ST-Microelectronics
M48Z512ASH Datasheet PDF : 17 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
Figure 3. Block Diagram
M48Z512A, M48Z512AY
VCC
POWER
512K x 8
VOLTAGE SENSE
SRAM ARRAY
E
AND
SWITCHING
E
CIRCUITRY
INTERNAL
BATTERY
VSS
A0-A18
DQ0-DQ7
W
G
AI02045
The M48Z512A/512AY also has its own Power-fail
Detect circuit. The control circuitry constantly mon-
itors the single 5V supply for an out of tolerance
condition. When VCC is out of tolerance, the circuit
write protects the SRAM, providing a high degree
of data security in the midst of unpredictable sys-
tem operation brought on by low VCC. As VCC falls
below approximately 3V, the control circuitry con-
nects the battery which maintains data until valid
power returns.
The ZEROPOWER RAM replaces industry stan-
dard SRAMs. It provides the nonvolatility of
PROMs without any requirement for special write
timing or limitations on the number of writes that
can be performed.
The M48Z512A/512AY has its own Power-fail De-
tect Circuit. The control circuitry constantly moni-
tors the single 5V supply for an out of tolerance
condition. When VCC is out of tolerance, the circuit
write protects the SRAM, providing a high degree
of data security in the midst of unpredictable sys-
tem operations brought on by low VCC. As VCC
falls below approximately 3V, the control circuitry
connects the battery which sustains data until valid
power returns.
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