DS3816C-512
16Mb Advanced NV SRAM with Clock
www.maxim-ic.com
FEATURES
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5V operation 鹵10%
Surface-mount NV RAM BGA module
construction
512k x 32 NV SRAM memory space and
separate 64 x 8 real-time clock memory
space
Real-time clock maintains hundredths of
seconds, seconds, minutes, hours, day, date,
month and year with leap year compensation
valid up to 2100
Removable backup power source provides
more than 8 years of timekeeping and data
retention
Read and write access times as fast as 70ns
for NV SRAM memory and 150ns for
real-time clock
Automatic data protection during power loss
Unlimited write cycle endurance
Low-power CMOS operation
Battery monitor checks remaining capacity
daily
Industrial temperature range of -40擄C to
+85擄C
PACKAGE OUTLINE
Top View
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Bottom View
Side View
DESCRIPTION
The DS3816C-512 is a 524,288 x 32-advanced nonvolatile (NV) SRAM module with a 168-bump ball
grid array (BGA) pinout. The highly integrated DS3816C-512 contains a 64-byte real time clock, four
8Mb SRAMs and control circuitry which constantly monitors V
CC
for an out-of-tolerance condition.
When such a condition occurs, the DS3816C-512 makes use of an attached DS3802 Battery Cap to
maintain clock information and preserve stored data while protecting that data by disallowing all memory
accesses. Additionally, the DS3816C-512 has dedicated circuitry for monitoring the status of V
CC
and the
status of an attached DS3802 Battery Cap.
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08/12/02