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FEATURES
10 years minimum data retention in the
absence of external power
Data is automatically protected during power loss
Power supply monitor resets processor when
V
CC
power loss occurs and holds processor in
reset during V
CC
ramp-up
Battery monitor checks remaining capacity
daily
Read and write access times as fast as 70 ns
Unlimited write cycle endurance
Typical standby current 50
μ
A
Upgrade for 512k x 8 SRAM, EEPROM or
Flash
Lithium battery is electrically disconnected to
retain freshness until power is applied for the
first time
Full
±
10% V
CC
operating range (DS1350Y)
or optional
±
5% V
CC
operating range
(DS1350AB)
Optional industrial temperature range of
-40
°
C to +85
°
C, designated IND
New PowerCap Module (PCM) package
-
Directly surface-mountable module
-
Replaceable snap-on PowerCap provides
lithium backup battery
-
Standardized pinout for all nonvolatile
SRAM products
-
Detachment feature on PowerCap allows
easy removal using a regular screwdriver
PIN ASSIGNMENT
PIN DESCRIPTION
A0 - A18
DQ0 - DQ7
CE
WE
OE
RST
BW
V
CC
GND
NC
- Address Inputs
- Data In/Data Out
- Chip Enable
- Write Enable
- Output Enable
- Reset Output
- Battery Warning
- Power (+5V)
- Ground
- No Connect
DESCRIPTION
The DS1350 4096k Nonvolatile SRAMs are 4,194,304-bit, fully static, nonvolatile SRAMs organized as
524,288 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and control circuitry
which constantly monitors V
CC
for an out-of-tolerance condition. When such a condition occurs, the
lithium energy source is automatically switched on and write protection is unconditionally enabled to
prevent data corruption. Additionally, the DS1350 devices have dedicated circuitry for monitoring the
status of V
CC
and the status of the internal lithium battery. DS1350 devices in the PowerCap Module
package are directly surface mountable and are normally paired with a DS9034PC PowerCap to form a
complete Nonvolatile SRAM module. The devices can be used in place of 512k x 8 SRAM, EEPROM or
Flash components.
DS1350Y/AB
4096k Nonvolatile SRAM
with Battery Monitor
www.dalsemi.com
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
BW
A15
A16
RST
V
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
33
A17
GND
V
BAT
34-Pin POWERCAP MODULE (PCM)
(USES DS9034PC POWERCAP)