DS1230Y-120 Datasheet, PDF (1/10 Pages) Maxim Integrated Products – 256k Nonvolatile SRAM

19-5635; Rev 11/10
www.maxim-ic.com
DS1230Y/AB
256k Nonvolatile SRAM
FEATURES
 10 years minimum data retention in the
absence of external power
 Data is automatically protected during power
loss
 Replaces 32k 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 (DS1230Y)
 Optional ±5% V_CC operating range
(DS1230AB)
 Optional industrial temperature range of
-40°C to +85°C, designated IND
 JEDEC standard 28-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
PIN ASSIGNMENT
A14 1
A12 2
A7 3
A6 4
A5 5
A4 6
A3 7
A2 8
A1 9
A0 ¹⁰
DQ0 ¹¹
DQ1
12
DQ2 ¹³
GND ¹⁴
28
V_CC
27
WE
26 A13
25
A8
24 A9
23 A11
22 OE
21 A10
20
CE
19
DQ7
18
DQ6
17
DQ5
16
DQ4
15
DQ3
28-Pin Encapsulated Package
740-mil Extended
NC
1
NC
2
NC
3
NC
4
V_CC
5
WE
6
OE
7
CE
8
DQ7
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 - A14
- 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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