M48T513V-85CS1 STMicroelectronics, M48T513V-85CS1 Datasheet - Page 4

• Manufacturer Part Number: M48T513V-85CS1
• Manufacturer: STMicroelectronics
• Type: NVSRAMr

Specifications of M48T513V-85CS1

• Word Size: 8b
• Organization: 512x8
• Density: 4Mb
• Interface Type: Parallel
• Access Time (max): 85ns
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (max): 3.6V
• Operating Supply Voltage (min): 3V
• Operating Temp Range: 0C to 70C
• Pin Count: 32
• Mounting: Surface Mount
• Supply Current: 60mA
• Lead Free Status / RoHS Status: Supplier Unconfirmed

M48T513Y, M48T513V
DESCRIPTION
The M48T513Y/V TIMEKEEPER
512 Kb x 8 non-volatile static RAM and real time
clock, with programmable alarms and a watchdog
timer. The special DIP package provides a fully in-
tegrated battery back-up memory and real time
clock solution. The M48T513Y/V directly replaces
industry standard 512 Kb x 8 SRAM. It also pro-
vides the non-volatility of Flash without any re-
quirement for special WRITE timing or limitations
on the number of WRITEs that can be performed.
For surface mount environments ST provides a
Chip Set solution consisting of a 44-pin, 330mil
SOIC TIMEKEEPER Supervisor (M48T201V/Y)
and a 32-pin TSOP Type II (10 x 20mm) LPSRAM
(M68Z512/W) packages.
The 44-pin, 330mil SOIC provides sockets with
gold plated contacts at both ends for direct con-
Figure 3. Logic Diagram
4/31
A0-A18
RSTIN
WDI
W
G
E
19
M48T513Y
M48T513V
V CC
V SS
8
RAM is a
DQ0-DQ7
RST
IRQ/FT
AI02308
nection to a separate SNAPHAT housing contain-
ing the battery.
The unique design allows the SNAPHAT battery
package to be mounted on top of the SOIC pack-
age after the completion of the surface mount pro-
cess. 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 pre-
vent reverse insertion.
The SNAPHAT battery package is shipped sepa-
rately in plastic anti-static tubes or in Tape & Reel
form. The part number is “M4Txx-BR12SH1” (see
Table 15, page 24).
Table 1. Signal Names
A0-A18
DQ0-DQ7
E
G
W
WDI
RST
RSTIN
IRQ/FT
V
V
CC
SS
Address Inputs
Data Inputs / Outputs
Chip Enable Input
Output Enable Input
WRITE Enable Input
Watchdog input
Reset Output (open drain)
Reset Input
Interrupt / Frequency Test
Output (open drain)
Supply Voltage
Ground