M48T37Y-70MH1E STMicroelectronics, M48T37Y-70MH1E Datasheet - Page 2

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
Contents
Contents
1
2
3
4
5
6
7
8
9
2/30
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operation modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1
2.2
2.3
Clock operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
DC and AC parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Environmental information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Setting the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Watchdog timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Power-on reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Initial power-on defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
READ mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
WRITE mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Data retention mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Reading the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Stopping and starting the oscillator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Setting the alarm clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Calibrating the clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Programmable interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Battery low flag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
V
CC
noise and negative going transients . . . . . . . . . . . . . . . . . . . . . . . . . 18
Doc ID 7019 Rev 9
M48T37Y, M48T37V

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