DS1345WP-150+ Maxim Integrated Products, DS1345WP-150+ Datasheet

IC NVSRAM 1MBIT 150NS 34PCM

DS1345WP-150+

Manufacturer Part Number
DS1345WP-150+
Description
IC NVSRAM 1MBIT 150NS 34PCM
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of DS1345WP-150+

Format - Memory
RAM
Memory Type
NVSRAM (Non-Volatile SRAM)
Memory Size
1M (128K x 8)
Speed
150ns
Interface
Parallel
Voltage - Supply
3 V ~ 3.6 V
Operating Temperature
0°C ~ 70°C
Package / Case
34-PowerCap™ Module
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
19-5587; 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 128k x 8 SRAM, EEPROM or
 Lithium battery is electrically disconnected to
 Optional industrial temperature range of
 PowerCap Module (PCM) package
DESCRIPTION
The DS1345W 3.3V 1024k Nonvolatile SRAM is a 1,048,576-bit, fully static, nonvolatile SRAM
organized as 131,072 words by 8 bits. Each NV SRAM has a self-contained lithium energy source and
control circuitry, which constantly monitors V
occurs, the lithium energy source is automatically switched on and write protection is unconditionally
enabled to prevent data corruption. Additionally, the DS1345W has dedicated circuitry for monitoring the
status of V
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 128k x 8 SRAM, EEPROM or
Flash components.
www.maxim-ic.com
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
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
and the status of the internal lithium battery. DS1345W devices in the PowerCap Module
CC
ramp-up
CC
for an out-of-tolerance condition. When such a condition
1 of 10
PIN ASSIGNMENT
PIN DESCRIPTION
A0-A16
DQ0-DQ7
V
GND
NC
CE
WE
OE
RST
BW
GND
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
RST
A15
A16
CC
BW
V
WE
OE
CE
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 1024k 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 (+3.3 Volts)
- Ground
- No Connect
BAT
DS1345W
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

Related parts for DS1345WP-150+

DS1345WP-150+ Summary of contents

Page 1

Rev 10/10 www.maxim-ic.com 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 power loss occurs and holds processor in ...

Page 2

READ MODE The DS1345W executes a read cycle whenever Enable) and (Output Enable) are active (low). The unique address specified by the 17 address inputs defines which of the 131,072 bytes of data is to ...

Page 3

... PACKAGES 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 DS1345W device to be surface mounted without subjecting its lithium backup battery to destructive high-temperature reflow soldering ...

Page 4

ABSOLUTE MAXIMUM RATINGS Voltage on Any Pin Relative to Ground Operating Temperature Range Commercial: Industrial: Storage Temperature Range Lead Temperature (soldering, 10s) Soldering Temperature (reflow) This is a stress rating only and functional operation of the device at these or ...

Page 5

AC ELECTRICAL CHARACTERISTICS PARAMETER Read Cycle Time Access Time to Output Valid OE to Output Valid Output Active OE CE Output High Z from Deselection Output Hold from Address Change Write Cycle Time Write Pulse Width Address ...

Page 6

WRITE CYCLE 1 SEE NOTES AND 12 WRITE CYCLE 2 SEE NOTES AND DS1345W ...

Page 7

POWER-DOWN/POWER-UP CONDITION BATTERY WARNING DETECTION SEE NOTE DS1345W ...

Page 8

POWER-DOWN/POWER-UP TIMING PARAMETER V Fail Detect to and CE CC Inactive WE V slew from Fail Detect to RST CC Active V slew from Valid to and CE ...

Page 9

... Output: 1.5V Input pulse Rise and Fall Times: 5ns ORDERING INFORMATION PART DS1345WP-100+ DS1345WP-100IND+ + Denote sa lead(Pb)-free/RoHS-compliant package. * DS9034PC+ or DS9034PCI+ (PowerCap) required. Must be ordered separately. PACKAGE INFORMATION For the latest package outline information and land patterns www.maxim-ic.com/packages. that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status ...

Page 10

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time © 2010 Maxim Integrated Products DESCRIPTION Maxim and the Dallas logo are registered trademarks of Maxim Integrated Products, Inc. DS1345W PAGES CHANGED ...

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