M48Z128, M48Z128Y, M48Z128V*
Figure 5. Hardware Hookup for Equivalent Surface-Mount (SMT) Solution
SNAPHAT
BATTERY(3)
THS(1,2) VOUT
M40Z300/W
E
E1CON
E2CON
E3CON
E4CON
A
RST
B
BL
VSS
VCC
E2
1Mb LPSRAM
E
DQ0-DQ7
A0-A16
W
VSS
AI03625
Note: For pin connections, see individual data sheet for M48Z300/300W at www.st.com.
1. Connect THS pin to VOUT if 4.2V ≤ VPFD ≤ 4.5V (M48Z128Y) or connect THS pin to VSS if 4.5V ≤ VPFD ≤ 4.75V (M48Z128).
2. Connect THS pin to VSS if 2.8V ≤ VPFD ≤ 3.0V (M48Z128V).
3. SNAPHAT® Top ordered separately.
Table 2. Equivalent Surface-Mount (SMT) Solution
NVRAM
LPSRAM
SUPERVISOR
M48Z128
5V 1Mb LPSRAM
M40Z300
M48Z128Y
5V 1Mb LPSRAM
M40Z300
M48Z128V
3V 1Mb LPSRAM
M40Z300W
Note: 1. Connection of Threshold Select Pin (Pin 13) of SUPERVISOR (M40Z300/300W).
THS Pin(1)
VSS
VOUT
VSS
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