DS1245Y-70IND Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 1024k Nonvolatile SRAM

19-5638; Rev 11/10
www.maxim-ic.com
FEATURES
 10 years minimum data retention in the
absence of external power
 Data is automatically protected during power
loss
 Replaces 128k x 8 volatile static RAM,
EEPROM or Flash memory
 Unlimited write cycles
 Low-power CMOS
 Read and write access times of 70 ns
 Lithium energy source is electrically
disconnected to retain freshness until power is
applied for the first time
 Full ±10% V_CC operating range (DS1245Y)
 Optional ±5% V_CC operating range
(DS1245AB)
 Optional industrial temperature range of
-40°C to +85°C, designated IND
 JEDEC standard 32-pin DIP package
 PowerCap Module (PCM) package
- Directly surface-mountable module
- Replaceable snap-on PowerCap provides
lithium backup battery
- Standardized pinout for all nonvolatile
SRAM products
- Detachment feature on PowerCap allows
easy removal using a regular screwdriver
DS1245Y/AB
1024k Nonvolatile SRAM
PIN ASSIGNMENT
NC 1
A16 ₂
A14 3
A12 4
A7 5
A6 6
A5 7
A4 8
A3 9
A2 10
A1 11
A0 ¹²
DQ0 ¹³
DQ1 14
DQ2 15
GND 16
32
VCC
31 A15
30 NC
29 WE
28
A13
27 A8
26
A9
25 A11
24
OE
23 A10
22
CE
21
DQ7
20
DQ6
19
DQ5
18 DQ4
17 DQ3
32-Pin Encapsulated Package
740-mil Extended
NC
1
A15
2
A16
3
NC
4
VCC
WE
5
6
OE
CE
DQ7
7
8
9
DQ6
10
DQ5
11
DQ4
12
DQ3
DQ2
13
14
GND VBAT
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 - A16
- Address Inputs
DQ0 - DQ7
- Data In/Data Out
CE
- Chip Enable
WE
- Write Enable
OE
- Output Enable
V_CC
GND
- Power (+5V)
- Ground
NC
- No Connect
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