DS1330Y_10 Datasheet, PDF (1/10 Pages) Dallas Semiconductor – 256k Nonvolatile SRAM with Battery Monitor

19-5593; Rev 10/10
www.maxim-ic.com
DS1330Y/AB
256k Nonvolatile SRAM
with Battery Monitor
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
BW
1
NC
2
NC
3
RST
4
VCC
WE
5
6
OE
7
CE
DQ7
8
9
DQ6
10
DQ5
11
DQ4
12
DQ3
13
GND VBAT
DQ2
14
DQ1
15
DQ0
16
GND
17
34
NC
33
NC
32
A14
31
A13
30
A12
29
A11
28
A10
27
A9
26
A8
25
A7
24
A6
23
A5
22
A4
21
A3
20
A2
19
A1
18
A0
34-Pin POWERCAP MODULE (PCM)
(Uses DS9034PC+ or DS9034PCI+ PowerCap)
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
GND
- Power (+5V)
- 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.
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