M48T37Y-70MH1E STMicroelectronics, M48T37Y-70MH1E Datasheet - Page 23

• Manufacturer Part Number: M48T37Y-70MH1E
• Description: IC TIMEKPR NVRAM 256KBIT5V 44SOH
• Manufacturer: STMicroelectronics
• Series: Timekeeper®r
• Type: Clock/Calendar/NVSRAMr

Specifications of M48T37Y-70MH1E

• Memory Size: 256K (32K x 8)
• Time Format: HH:MM:SS (24 hr)
• Date Format: YY-MM-DD-dd
• Interface: Parallel
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 44-SOH
• Bus Type: Parallel
• User Ram: 32KB
• Operating Supply Voltage (typ): 5V
• Package Type: SOH
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 44
• Mounting: Surface Mount
• Memory Configuration: 32K X 8
• Nvram Features: RTC
• Interface Type: Parallel
• Access Time: 70ns
• Supply Voltage Range: 4.5V To 5.5V
• Memory Case Style: SOIC
• No. Of Pins: 44
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2854-5; M48T37Y-70MH1

M48T37Y, M48T37V
Note:
Table 12.
1. Valid for ambient operating temperature: T
2. V
3. V
4. t
Table 13.
1. Valid for ambient operating temperature: T
2. At 25 °C, V
3. Using larger M4T32-BR12SH6 SNAPHAT
All voltages referenced to V
Symbol
Symbol
t
V
t
(except where noted).
until 200 µs after V
(except where noted).
device).
V
DR
REC
REC
t
PFD
t
FB
PFD
PFD
t
SO
F
t
RB
(2)
R
(2)
(3)
(4)
(min) = 20 ms for industrial temperature range - grade 6 device.
(min) to V
(max) to V
Power-fail deselect voltage
Battery backup switchover voltage
Expected data retention time
CC
Power down/up AC characteristics
Power down/up trip points DC characteristics
V
V
V
V
V
PFD
PFD
PFD
SS
PFD
= 0 V.
SS
PFD
to V
(min) to V
fall time of less than t
(max) to V
(min) to V
(max) to RST high
CC
(min) fall time of less than t
PFD
passes V
(min) V
Parameter
PFD
SS
Parameter
PFD
SS
PFD
V
.
(max) V
Doc ID 7019 Rev 9
CC
CC
(min) V
(min).
fall time
rise time
FB
(1)
®
A
A
(1)
may cause corruption of RAM data
CC
CC
top (recommended for industrial temperature range - grade 6
= 0 to 70 °C or –40 to 85 °C; V
= 0 to 70 °C or –40 to 85 °C; V
rise time
fall time
F
may result in deselection/write protection not occurring
M48T37Y
M48T37V
M48T37Y
M48T37V
Grade 1
Grade 6
10
Min
4.2
2.7
5
(3)
Min
300
10
10
40
1
V
CC
CC
PFD
= 4.5 to 5.5 V or 3.0 to 3.6 V
= 4.5 to 5.5 V or 3.0 to 3.6 V
V
DC and AC parameters
Typ
4.4
2.9
–100 mV
BAT
7
Max
200
Max
4.5
3.0
Unit
ms
µs
µs
µs
µs
Years
Years
Unit
V
V
V
V
23/30