DS1245Y-85+ Dallas Semiconductor, DS1245Y-85+ Datasheet

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DS1245Y-85+

Manufacturer Part Number
DS1245Y-85+
Description
SRAM, Nonvolatile, 128k x 8, 85 nS, DIP32
Manufacturer
Dallas Semiconductor
Datasheet

Specifications of DS1245Y-85+

Capacitance, Input
5 pF
Capacitance, Output
5 pF
Current, Input, Leakage
±1 μA
Current, Operating
85 mA
Current, Output, Leakage
±1
Data Retention
10 yrs.
Density
1024K
Interface
Parallel Bus
Memory Type
Non-Volatile SRAM
Organization
128K×8
Package Type
740 EMOD
Temperature, Operating
0 to +70 °C
Time, Access
85 ns
Time, Address Hold
5
Time, Fall
5 ns
Time, Rise
5 ns
Voltage, Input, High
5 V
Voltage, Input, Low
0.8 V
Voltage, Supply
5 V
Lead Free Status / Rohs Status
RoHS Compliant part Hazardous Materials
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 as fast as 70 ns
Lithium energy source is electrically
disconnected to retain freshness until power is
applied for the first time
Full ±10% V
Optional ±5% V
(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
CC
operating range (DS1245Y)
CC
operating range
1 of 13
PIN ASSIGNMENT
PIN DESCRIPTION
A0 - A16
DQ0 - DQ7
V
GND
NC
CE
OE
WE
GND
CC
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
A15
A16
V
WE
NC
NC
OE
CE
CC
1024k Nonvolatile SRAM
32-PIN ENCAPSULATED PACKAGE
34-PIN POWERCAP MODULE (PCM)
GND
DQ0
DQ1
DQ2
A16
A14
A12
NC
(USES DS9034PC POWERCAP)
A7
A6
A5
A4
A3
A2
A1
A0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
740 MIL EXTENDED
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
GND V
- Address Inputs
- Data In/Data Out
- Chip Enable
- Write Enable
- Output Enable
- Power (+5V)
- Ground
- No Connect
BAT
DS1245Y/AB
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
V
A15
NC
WE
A13
A8
A9
A11
OE
A10
CE
DQ7
DQ6
DQ5
DQ4
DQ3
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
CC
NC
NC
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0

Related parts for DS1245Y-85+

DS1245Y-85+ Summary of contents

Page 1

... Unlimited write cycles Low-power CMOS Read and write access times as fast Lithium energy source is electrically disconnected to retain freshness until power is applied for the first time Full ±10% V operating range (DS1245Y) CC Optional ±5% V operating range CC (DS1245AB) Optional industrial temperature range of -40°C to +85°C, designated IND ...

Page 2

... ODW DATA RETENTION MODE The DS1245AB provides full functional capability for V 4.5 volts. The DS1245Y provides full functional capability for V protects by 4.25 volts. Data is maintained in the absence of V The nonvolatile static RAMs constantly monitor V automatically write-protect themselves, all inputs become “don’t care,” and all outputs become high impedance ...

Page 3

... IL ≤ - CCS1 I CCS2 I CCO1 V 4. DS1245Y/ See Note 10) A TYP MAX UNITS NOTES 5.0 5.25 V 5.0 5 0.8 V =5V ± 5% for DS1245AB =5V ± 10% for DS1245Y) CC TYP MAX UNITS NOTES μA +1.0 μA +1 μA 200 600 μA 50 150 85 mA 4.62 4.75 V ...

Page 4

... SYMBOL MIN TYP I See Note 10 DS1245AB-70 DS1245AB-85 DS1245Y-70 SYMBOL MIN MAX MIN ACC COE WR1 t 15 WR2 t 25 ODW t 5 OEW DH1 t 10 DH2 DS1245Y/AB 4 =25°C) A MAX UNITS NOTES =5V ± 5% for DS1245AB) CC =5V ± 10% for DS1245Y) CC DS1245Y-85 UNITS NOTES MAX ...

Page 5

... See Note 10 DS1245AB-100 DS1245AB-120 DS1245Y-100 DS1245Y-120 SYMBOL MIN MAX MIN t 100 RC t 100 ACC 100 COE 100 WR1 t 15 WR2 t 35 ODW t 5 OEW DH1 t 10 DH2 DS1245Y/AB =5V ± 5% for DS1245AB) CC =5V ± 10% for DS1245Y) CC MAX UNITS NOTES 120 ns 120 120 120 ...

Page 6

... SYMBOL MIN during write cycle, the output buffers remain in a high impedance state. IH and . t is measured from the latter going high going high DS1245Y/ See Note 10) A TYP MAX UNITS NOTES μs 1.5 μs μ 125 ms (t =25°C) A TYP MAX UNITS ...

Page 7

... DS1245Y-70IND -40°C to +85°C DS1245Y-70IND+ -40°C to +85°C DS1245YP-70IND -40°C to +85°C DS1245YP-70IND+ -40°C to +85°C DS1245Y-85 0°C to +70°C DS1245Y-85+ 0°C to +70°C DS1245Y-100 0°C to +70°C DS1245Y-100+ 0°C to +70°C DS1245YP-100 0°C to +70°C DS1245YP-100+ 0°C to +70°C DS1245Y-120 0° ...

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