DS1330W Maxim, DS1330W Datasheet

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DS1330W

Manufacturer Part Number
DS1330W
Description
The DS1330W 3
Manufacturer
Maxim
Datasheet

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19-5590; Rev 10/10
FEATURES
 10 years minimum data retention in the
 Data is automatically protected during power
 Power supply monitor resets processor when
 Battery monitor checks remaining capacity
 Read and write access times of 100 ns
 Unlimited write cycle endurance
 Typical standby current 50 µA
 Upgrade for 32k x 8 SRAM, EEPROM or
 Lithium battery is electrically disconnected to
 Optional industrial temperature range of
 PowerCap Module (PCM) package
DESCRIPTION
The DS1330W 3.3V 256k Nonvolatile SRAM is a 262,144-bit, fully static, nonvolatile SRAM 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
the lithium energy source is automatically switched on and write protection is unconditionally enabled to
prevent data corruption. Additionally, the DS1330W has dedicated circuitry for monitoring the status of
V
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 32k x 8 SRAM, EEPROM or Flash
components.
www.maxim-ic.com
CC
absence of external power
loss
V
reset during V
daily
Flash
retain freshness until power is applied for the
first time
-40°C to +85°C, designated IND
and the status of the internal lithium battery. DS1330W devices in the PowerCap Module package
CC
− Directly surface-mountable module
− Replaceable snap-on PowerCap provides
− Standardized pinout for all nonvolatile
− Detachment feature on PowerCap allows
lithium backup battery
SRAM products
easy removal using a regular screwdriver
power loss occurs and holds processor in
CC
ramp-up
CC
for an out-of-tolerance condition. When such a condition occurs,
1 of 10
PIN ASSIGNMENT
GND
PIN DESCRIPTION
A0-A14
DQ0-DQ7
V
GND
NC
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
RST
CE
WE
OE
RST
BW
BW
V
WE
NC
NC
OE
CE
CC
CC
(Uses DS9034PC+ or DS9034PCI+ PowerCap)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
3.3V 256k Nonvolatile SRAM
34-Pin PowerCap Module (PCM)
GND V
with Battery Monitor
- Address Inputs
- Data In/Data Out
- Chip Enable
- Write Enable
- Output Enable
- Reset Output
- Battery Warning Output
- Power (+3.3V)
- Ground
- No Connect
BAT
DS1330W
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
NC
NC
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0

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DS1330W Summary of contents

Page 1

... Additionally, the DS1330W has dedicated circuitry for monitoring the status of V and the status of the internal lithium battery. DS1330W devices in the PowerCap Module package CC are directly surface mountable and are normally paired with a DS9034PC PowerCap to form a complete Nonvolatile SRAM module ...

Page 2

... On power-up, RST during power-on transients and to allow t BATTERY MONITORING The DS1330W automatically performs periodic battery voltage monitoring on a 24-hour time interval. Such monitoring begins within t occurs. After each 24-hour period has elapsed, the battery is connected to an internal 1MΩ test resistor for 1 second ...

Page 3

... The 34-pin PowerCap Module integrates SRAM memory and nonvolatile control into a module base along with contacts for connection to the lithium battery in the DS9034PC PowerCap. The PowerCap Module package design allows a DS1330W device to be surface mounted without subjecting its lithium backup battery to destructive high-temperature reflow soldering. After a DS1330W module base is reflow soldered, a DS9034PC is snapped on top of the base to form a complete Nonvolatile SRAM module ...

Page 4

... See Note 10) A MAX UNITS 3 0.4 V =3.3V ±0.3V) CC MAX UNITS +1.0 µA +1.0 µ 250 µA 150 µ 3 +25°C) A MAX UNITS DS1330W +260°C +260°C NOTES NOTES 14 14 NOTES ...

Page 5

... COE 100 WR1 t 20 WR2 t ODW t 5 OEW DH1 t 20 DH2 DS1330W =3.3V ±0.3V) CC UNITS NOTES MAX ns 100 100 ...

Page 6

... WRITE CYCLE 1 WRITE CYCLE DS1330W ...

Page 7

... POWER-DOWN/POWER-UP CONDITION BATTERY WARNING DETECTION DS1330W ...

Page 8

... See Note 10) A TYP MAX UNITS TYP MAX UNITS years is measured from the latter of low transition, the output WE high transition, the output WE low transition, CE DS1330W NOTES NOTES = +25°C) A NOTES ...

Page 9

... Each DS1330W has a built-in switch that disconnects the lithium source until V the user. The expected t DR time power is first applied by the user. 10. All AC and DC electrical characteristics are valid over the full operating temperature range. For commercial products, this range is 0°C to 70°C. For industrial products (IND), this range is -40°C to +85° ...

Page 10

... Updated the storage, lead, and soldering information in the Absolute Maximum Ratings section, removed the unused AC timing specs in 10/10 the AC Electrical Characteristics table, updated the Ordering Information table, replaced the package outline drawing with the Package Information table DESCRIPTION DS1330W PAGES CHANGED ...

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