M48T37Y-70MH1E STMicroelectronics, M48T37Y-70MH1E Datasheet - Page 19

IC TIMEKPR NVRAM 256KBIT5V 44SOH

M48T37Y-70MH1E

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

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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
M48T37Y-70MH1E
Manufacturer:
ST
Quantity:
936
Part Number:
M48T37Y-70MH1E
Manufacturer:
ST
Quantity:
9 331
Part Number:
M48T37Y-70MH1E
Manufacturer:
ST
0
M48T37Y, M48T37V
one volt. These negative spikes can cause data corruption in the SRAM while in battery
backup mode. To protect from these voltage spikes, it is recommended to connect a
Schottky diode from V
1N5817 is recommended for through hole and MBRS120T3 is recommended for surface
mount.
Figure 9.
Figure 10. Crystal accuracy across temperature
Figure 11. Clock calibration
NORMAL
POSITIVE
CALIBRATION
NEGATIVE
CALIBRATION
Frequency (ppm)
–100
–120
–140
–160
–20
–40
–60
–80
20
0
–40
Supply voltage protection
–30
CC
–20
to V
–10
SS
V CC
Doc ID 7019 Rev 9
(cathode connected to V
0.1µF
0
10
Temperature °C
ΔF = -0.038
F
20
T
30
V CC
V SS
0
ppm
= 25 °C
C
2
DEVICE
CC
(T - T
40
, anode to V
0
)
2
50
± 10%
60
SS
Clock operations
). Schottky diode
70
80
AI00594B
AI02169
AI00999
19/30

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