M48T59-70PC1(2008) View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
M48T59-70PC1 Datasheet PDF : 32 Pages
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DC and AC parameters
M48T59, M48T59Y, M48T59V
Table 12. Power down/up AC characteristics
Symbol
Parameter(1)
Min
Max
Unit
tPD
tF(2)
tFB(3)
tR
tRB
trec
E or W at VIH before power down
VPFD (max) to VPFD (min) VCC fall time
VPFD (min) to VSS VCC fall time
VPFD (min) to VPFD (max) VCC rise time
VSS to VPFD (min) VCC rise time
VPFD (max) to RST high
0
µs
300
µs
10
µs
10
µs
1
µs
40
200
ms
1. Valid for ambient operating temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5 V, 4.75 to 5.5 V, or 3.0 to 3.6 V
(except where noted).
2. VPFD (max) to VPFD (min) fall time of less than tF may result in deselection/write protection not occurring
until 200µs after VCC passes VPFD (min).
3. VPFD (min) to VSS fall time of less than tFB may cause corruption of RAM data.
Table 13. Power down/up trip points DC characteristics
Symbol
Parameter(1)(2)
Min
Typ
Max Unit
M48T59 4.5
4.6
4.75
V
t(s) VPFD Power-fail deselect voltage
M48T59Y 4.2
M48T59V 2.7
4.35
2.9
4.5
V
3.0
V
duc VSO
Battery back-up switchover
voltage
M48T59/Y
M48T59V
3.0
VPFD –100mV
ro tDR(3) Expected data retention time
7
V
V
YEARS
P 1. Valid for ambient operating temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5 V, 4.75 to 5.5 V, or 3.0 to 3.6 V
te (except where noted).
le 2. All voltages referenced to VSS.
Obsolete Product(s) - Obso 3. At 25°C, VCC = 0 V.
24/32
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