M48T201V-85MH1TR STMicroelectronics, M48T201V-85MH1TR Datasheet - Page 6

• Manufacturer Part Number: M48T201V-85MH1TR
• Manufacturer: STMicroelectronics

Specifications of M48T201V-85MH1TR

• Bus Type: Parallel
• User Ram: 512KB
• Operating Supply Voltage (typ): 3.3V
• Package Type: SOH
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Pin Count: 44
• Mounting: Surface Mount
• Date Format: DW:DM:M:Y
• Time Format: HH:MM:SS
• Lead Free Status / RoHS Status: Not Compliant

Description
1
Caution:
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Description
The M48T201Y/V are self-contained devices that include a real time clock (RTC),
programmable alarms, a watchdog timer, and a square wave output which provides control
of up to 512 K x 8 of external low-power static RAM. Access to all RTC functions and the
external RAM is the same as conventional bytewide SRAM. The 16 TIMEKEEPER
registers offer year, month, date, day, hour, minute, second, calibration, alarm, century,
watchdog, and square wave output data. Externally attached static RAMs are controlled by
the M48T201Y/V via the G
The 44-pin, 330 mil SOIC provides sockets with gold plated contacts at both ends for direct
connection to a separate SNAPHAT
unique design allows the SNAPHAT battery package to be mounted on top of the SOIC
package after the completion of the surface mount process.
Insertion of the SNAPHAT housing after reflow prevents potential battery damage due to the
high temperatures required for device surface-mounting. The SNAPHAT housing is keyed to
prevent reverse insertion. The SOIC and battery packages are shipped separately in plastic
anti-static tubes or in tape & reel form. For the 44-lead SOIC, the battery/crystal package
(e.g., SNAPHAT) part number is “M4Txx-BR12SH” (see
Do not place the SNAPHAT battery/crystal top in conductive foam as this will drain the
lithium button-cell battery.
Figure 1.
Logic diagram
RSTIN1
RSTIN2
A0-A18
CON
WDI
W
G
E
and E
19
®
CON
housing containing the battery and crystal. The
M48T201Y
M48T201V
signals.
V CC
V SS
8
Table 19 on page
IRQ/FT
RST
G CON
E CON
SQW
V OUT
DQ0-DQ7
AI02240
M48T201Y, M48T201V
34).
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