DS1250Y-70IND Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 4096k Nonvolatile SRAM

19-5647; Rev 12/10
www.maxim-ic.com
FEATURES
 10 years minimum data retention in the
absence of external power
 Data is automatically protected during power
loss
 Replaces 512k x 8 volatile static RAM,
EEPROM or Flash memory
 Unlimited write cycles
 Low-power CMOS
 Read and write access times of 70ns
 Lithium energy source is electrically
disconnected to retain freshness until power is
applied for the first time
 Full ±10% V_CC operating range (DS1250Y)
 Optional ±5% V_CC operating range
(DS1250AB)
 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 PCM allows easy
removal using a regular screwdriver
DS1250Y/AB
4096k Nonvolatile SRAM
PIN ASSIGNMENT
A18 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 A17
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
5
WE
6
OE
7
CE
8
DQ7
9
DQ6
10
DQ5
11
DQ4
12
DQ3
13
GND VBAT
DQ2
14
DQ1
15
DQ0
16
GND
17
34
A18
33
A17
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)
(Uese DS9034PC+ or DS9034PCI+ POWERCAP)
PIN DESCRIPTION
A0 - A18
- 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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