DS1350Y/AB
4096k Nonvolatile SRAM
with Battery Monitor
www.dalsemi.com
FEATURES
PIN ASSIGNMENT
ꢀ 10 years minimum data retention in the
absence of external power
A18
A17
A14
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
BW
A15
A16
ꢀ
Data is automatically protected during power loss
A13
A12
A11
A10
A9
ꢀ Power supply monitor resets processor when
VCC power loss occurs and holds processor in
reset during VCC 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 µA
ꢀ Upgrade for 512k x 8 SRAM, EEPROM or
Flash
RST
VCC
WE
OE
CE
A8
DQ7
DQ6
DQ5
DQ4
DQ3
A7
A6
A5
A4
A3
A2
A1
A0
GND VBAT
DQ2
DQ1
DQ0
GND
34-Pin POWERCAP MODULE (PCM)
(USES DS9034PC POWERCAP)
ꢀ Lithium battery is electrically disconnected to
retain freshness until power is applied for the
first time
ꢀ Full ±10% VCC operating range (DS1350Y)
or optional ±5% VCC operating range
(DS1350AB)
ꢀ Optional industrial temperature range of
-40°C to +85°C, designated IND
ꢀ New PowerCap Module (PCM) package
PIN DESCRIPTION
A0 - A18
DQ0 - DQ7
CE
- Address Inputs
- Data In/Data Out
- Chip Enable
- Write Enable
- Output Enable
- Reset Output
- Battery Warning
- Power (+5V)
- Ground
WE
OE
RST
-
-
Directly surface-mountable module
Replaceable snap-on PowerCap provides
lithium backup battery
BW
VCC
GND
NC
-
-
Standardized pinout for all nonvolatile
SRAM products
Detachment feature on PowerCap allows
easy removal using a regular screwdriver
- 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 VCC 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 VCC 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.
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