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M41T256YMH7E

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M41T256Y DC and AC parameters
25/30
Figure 14. Power down/up mode AC waveforms
Table 10. Power down/up AC characteristics
Symbol Parameter
(1)
1. Valid for ambient operating temperature: T
A
= –25 to 70°C; V
CC
= 4.5 to 5.5V (except where noted).
Min Typ Max Unit
t
F
(2)
2. V
PFD
(max) to V
PFD
(min) fall time of less than tF may result in deselection/write protection not occurring until 200µs after
V
CC
passes V
PFD
(min).
V
PFD
(max) to V
PFD
(min) V
CC
fall time 300 µs
t
FB
(3)
3. V
PFD
(min) to V
SS
fall time of less than t
FB
may cause corruption of RAM data.
V
PFD
(min) to V
SS
V
CC
fall time 10 µs
t
R
V
PFD
(min) to V
PFD
(max) V
CC
rise time 10 µs
t
RB
V
SS
to V
PFD
(min) V
CC
rise time 1 µs
t
REC
Power up deselect time 40 200 ms
t
DR
Expected data retention time (OSC on, sleep mode off) 7.2
(4)
4. At 25°C and V
CC
= 0V with the oscillator running and using M4T32-BR12SH SNAPHAT battery top.
years
AI04757
V
CC
INPUTS
(PER CONTROL INPUT)
OUTPUTS
DON'T CARE
HIGH-Z
tF
tFB
tR
tRB
tDR
VALID VALID
(PER CONTROL INPUT)
RECOGNIZEDRECOGNIZED
V
PFD
(max)
V
PFD
(min)
V
SO
tREC
RST
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Package mechanical data M41T256Y
26/30
6 Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK
®
packages. These packages have a Lead-free second level interconnect. The category of
second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
Figure 15. SOH44 – 44-lead plastic small outline, SNAPHAT, package outline
Note: Drawing is not to scale.
Table 11. SOH44 – 44-lead plastic small outline, SNAPHAT, package mech. data
SOH-A
E
N
D
C
LA1 α
1
H
A
CP
Be
A2
eB
Symb
mm inches
Typ Min Max Typ Min Max
A 3.05 0.120
A1 0.05 0.36 0.002 0.014
A2 2.34 2.69 0.092 0.106
B 0.36 0.46 0.014 0.018
C 0.15 0.32 0.006 0.012
D 17.71 18.49 0.697 0.728
E 8.23 8.89 0.324 0.350
e0.81– –0.032– –
eB 3.20 3.61 0.126 0.142
H 11.51 12.70 0.453 0.500
L 0.41 1.27 0.016 0.050
a0°8°0°8°
N44 44
CP 0.10 0.004
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M41T256Y Package mechanical data
27/30
Figure 16. SH – 4-pin SNAPHAT housing for 120mAh battery & crystal outline
Note: Drawing is not to scale.
Table 12. SH – 4-pin SNAPHAT housing for 120mAh battery & crystal, mechanical data
SHTK-A
A1
A
D
E
eA
eB
A2
B
L
A3
Symb
mm inches
Typ Min Max Typ Min Max
A 10.54 0.415
A1 8.00 8.51 0.315 .0335
A2 7.24 8.00 0.285 0.315
A3 0.38 0.015
B 0.46 0.56 0.018 0.022
D 21.21 21.84 0.835 0.860
E 17.27 18.03 0.680 .0710
eA 15.55 15.95 0.612 0.628
eB 3.20 3.61 0.126 0.142
L 2.03 2.29 0.080 0.090
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M41T256YMH7E

Mfr. #:
Buy M41T256YMH7E
Manufacturer:
STMicroelectronics
Description:
Real Time Clock Serial 256K (32Kx8)
Lifecycle:
New from this manufacturer.
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