M41T256YMT7 STMicroelectronics, M41T256YMT7 Datasheet - Page 25

• Manufacturer Part Number: M41T256YMT7
• Description: Real Time Clock Serial 256K (32Kx8)
• Manufacturer: STMicroelectronics

Specifications of M41T256YMT7

• Function: Clock, Calendar
• Rtc Memory Size: 32768 B
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 4.5 V
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: - 25 C
• Mounting Style: SMD/SMT
• Rtc Bus Interface: Serial
• Package / Case: SO-44
• Time Format: HH:MM:SS:hh
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 14. Power down/up mode AC waveforms
Table 10.
1. Valid for ambient operating temperature: T
2. V
3. V
4.
Symbol
V
At 25°C and V
t
t
PFD
CC
PFD
t
FB
t
t
REC
F
t
RB
DR
(2)
R
(3)
passes V
(min) to V
(max) to V
V CC
V PFD (max)
V PFD (min)
V SO
INPUTS
RST
OUTPUTS
Power down/up AC characteristics
V
V
V
V
Power up deselect time
Expected data retention time (OSC on, sleep mode off)
PFD
PFD
PFD
SS
PFD
CC
SS
PFD
to V
= 0V with the oscillator running and using M4T32-BR12SH SNAPHAT battery top.
(min).
fall time of less than t
(min) to V
(max) to V
(min) to V
(min) fall time of less than tF may result in deselection/write protection not occurring until 200µs after
PFD
(PER CONTROL INPUT)
(min) V
VALID
RECOGNIZED
SS
PFD
PFD
tF
V
(max) V
CC
CC
(min) V
Parameter
rise time
fall time
FB
A
may cause corruption of RAM data.
CC
CC
= –25 to 70°C; V
fall time
rise time
tFB
(1)
CC
tDR
= 4.5 to 5.5V (except where noted).
DON'T CARE
HIGH-Z
tRB
7.2
Min
300
10
10
40
1
(4)
Typ
tR
(PER CONTROL INPUT)
tREC
Max
200
RECOGNIZED
VALID
AI04757
years
Unit
ms
µs
µs
µs
µs
25/30