Datasheet

1 of 10
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 of 70ns
 Unlimited write cycle endurance
 Typical standby current 50µA
 Upgrade for 32k 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 (DS1330Y)
or optional ±5% V
CC
operating range
(DS1330AB)
 Optional industrial temperature range of
-40°C to +85°C, designated IND
 PowerCap Module (PCM) package
- Directly surface-mountable module
- Replaceable snap-on PowerCap provides
lithium backup battery
- Standardized pinout for all nonvolatile
(NV) SRAM products
- Detachment feature on PowerCap allows
easy removal using a regular screwdriver
PIN ASSIGNMENT
PIN DESCRIPTION
A0 – A14 - Address Inputs
DQ0 – DQ7 - Data In/Data Out
CE
- Chip Enable
WE
- Write Enable
OE
- Output Enable
RST
- Reset Output
BW
- Battery Warning
V
CC
- Power (+5V)
GND - Ground
NC - No Connect
DESCRIPTION
The DS1330 256k NV SRAMs are 262,144-bit, fully static, NV SRAMs organized as 32,768 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 DS1330 devices have dedicated circuitry for monitoring the status of V
CC
and the status
of the internal lithium battery. DS1330 devices in the PowerCap module package are directly surface
mountable and are normally paired with a DS9034PC PowerCap to form a complete NV SRAM module.
The devices can be used in place of 32k x 8 SRAM, EEPROM, or Flash components.
DS1330Y/AB
256k Nonvolatile SRAM
with Battery Monitor
1
BW
2
3
NC
NC
RST
V
CC
WE
OE
CE
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
GND
4
5
6
7
8
9
10
11
12
13
14
15
16
17
NC
A14
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
34
NC
GND
V
BAT
34-Pin POWERCAP MODULE (PCM)
(Uses DS9034PC+ or DS9034PCI+ PowerCap)
www.maxim-ic.com
19-5593; Rev 10/10