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M40Z300MH Datenblatt(PDF) 1 Page - STMicroelectronics

Teilenummer M40Z300MH
Bauteilbeschribung  NVRAM CONTROLLER for up to EIGHT LPSRAM
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

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March 2000
M40Z300
M40Z300W
NVRAM CONTROLLER for up to EIGHT LPSRAM
s
CONVERT LOW POWER SRAMs into
NVRAMs
s
PRECISION POWER MONITORING and
POWER SWITCHING CIRCUITRY
s
AUTOMATIC WRITE-PROTECTION when VCC
is OUT-OF-TOLERANCE
s
TWO INPUT DECODER ALLOWS CONTROL
for up to 8 SRAMs (with 2 devices active in
parallel)
s
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
s
RESET OUTPUT (RST) for POWER ON
RESET
s
LESS THAN 12ns CHIP ENABLE ACCESS
PROPAGATION DELAY (for 5.0V device)
s
PACKAGING INCLUDES a 28-LEAD SOIC
and SNAPHAT® TOP, or a 16-LEAD SOIC
(to be Ordered Separately)
s
SOIC PACKAGE PROVIDES DIRECT
CONNECTION for a SNAPHAT TOP which
CONTAINS the BATTERY
s
BATTERY LOW PIN (BL)
DESCRIPTION
The M40Z300/W NVRAM Controller is a self-con-
tained device which converts a standard low-pow-
er SRAM into a non-volatile memory. A precision
voltage reference and comparator monitors the
VCC input for an out-of-tolerance condition.
Figure 1. Logic Diagram
AI02242
THS
VCC
M40Z300
M40Z300W
BL
VSS
E
VOUT
B
A
E1CON
E2CON
E3CON
E4CON
RST
B+(1)
B–(1)
NOTE: 1. For 16-pin SOIC package only.
28
1
SOH28 (MH)
SNAPHAT (SH)
Battery
16
1
SO16 (MQ)


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