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M48T35V-10MH1, M48T35V-10PC1, M48T35Y

Table of contents:
Info of M48T35V-10MH1
Info of M48T35V-10PC1
Info of M48T35Y

M48T35V-10MH1, M48T35V-10PC1, M48T35Y Selling Leads, Datasheet

MFG:ST Package Cooled:SOP28W D/C:New

M48T35V-10MH1, M48T35V-10PC1, M48T35Y Picture

M48T35V-10MH1, M48T35V-10PC1, M48T35Y Datasheet download

Five Points

Part Number: M48T35V-10MH1

MFG: ST

Package Cooled: SOP28W

D/C: New

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M48T35Y General Description

The M48T35/Y TIMEKEEPER^® RAM is a 32Kb x 8 non-volatile static RAM and real time clock. The monolithic chip is available in two special packages to provide a highly integrated battery backed-up memory and real time clock solution.

The M48T35/Y is a non-volatile pin and function equivalent to any JEDEC standard 32Kb x 8 SRAM. It also easily fits into many ROM, EPROM, and EEPROM sockets, providing the non-volatility of PROMs without any requirement for special WRITE timing or limitations on the number of WRITEs that can be performed.

The 28-pin, 600mil DIP CAPHAT houses the M48T35/Y silicon with a quartz crystal and a long life lithium button cell in a single package.

The 28-pin, 330mil SOIC provides sockets with gold plated contacts at both ends for direct connection to a separate SNAPHAT^® housing containing the battery and crystal. The 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 and crystal damage due to the high temperatures required for device surfacemounting. The SNAPHAT housing is keyed to prevent reverse insertion. The SOIC and battery/crystal packages are shipped separately in plastic antistatic tubes or in Tape & Reel form.

For the 28-lead SOIC, the battery/crystal package (e.g., SNAPHAT) part number is "M4T28- BR12SH" (see Table 18, page 23).

M48T35Y Maximum Ratings

Symbol	Parameter		Value	Units
T_A	Ambient Operating Temperature	Grade 1	0 to 70
T_A	Ambient Operating Temperature	Grade 6	40 to 85
T_STG	Storage Temperature (V_CC Off, Oscillator Off)		40 to 85
T_SLD^(1,2)	Lead Solder Temperature for 10 seconds		260
V_IO	Input or Output Voltages	M48T35	0.3 to 7	V
V_IO	Input or Output Voltages	M48T35Y	0.3 to 7	V
V_CC	Supply Voltaget	M48T35	0.3 to 7	V
V_CC	Supply Voltaget	M48T35Y	0.3 to 7	V
I_O	Output Current		20	mA
P_D	Power Dissipation		0	W

Note: 1. For DIP package: Soldering temperature not to exceed 260°C for 10 seconds (total thermal budget not to exceed 150°C for longer than 30 seconds).
2. For SO package: Reflow at peak temperature of 215°C to 225°C for < 60 seconds (total thermal budget not to exceed 180°C for between 90 to 120 seconds).
CAUTION: Negative undershoots below 0.3V are not allowed on any pin while in the Battery Back-up mode.
CAUTION: Do NOT wave solder SOIC to avoid damaging SNAPHAT sockets.

M48T35Y Features

` INTEGRATED, ULTRA LOW POWER SRAM,REAL TIME CLOCK, POWER-FAIL CONTROL CIRCUIT AND BATTERY
` BYTEWIDE™ RAM-LIKE CLOCK ACCESS
` BCD CODED YEAR, MONTH, DAY, DATE,HOURS, MINUTES, AND SECONDS
` FREQUENCY TEST OUTPUT FOR REAL TIME CLOCK
` AUTOMATIC POWER-FAIL CHIP
    DESELECT AND WRITE PROTECTION
` WRITE PROTECT VOLTAGES (V_PFD = Power-fail Deselect Voltage):
   M48T35: V_CC= 4.75 to 5.5V
                     4.5V V_PFD 4.75V
   M48T35Y: V_CC = 4.5 to 5.5V
                       4.2V V_PFD 4.5V
` SELF-CONTAINED BATTERY AND CRYSTAL IN THE CAPHAT™ DIP PACKAGE
` SOIC PACKAGE PROVIDES DIRECT CONNECTION FOR A SNAPHAT^® HOUSING CONTAINING THE BATTERY ND CRYSTAL
` SNAPHAT^® HOUSING (BATTERY AND CRYSTAL) IS REPLACEABLE
` PIN AND FUNCTION COMPATIBLE WITH JEDEC STANDARD 32 Kb x 8 SRAMs

M48T35Y Connection Diagram

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