Dokumentace k M28256 - EPROM

Dokumentace k M28256 - EPROM
M28256
256K (32K x 8) PARALLEL EEPROM
with SOFTWARE DATA PROTECTION
DATA BRIEFING
FAST ACCESS TIME:
– 90ns at 5V
– 150ns at 3V
SINGLE SUPPLY VOLTAGE:
– 5V ± 10% for M28256
– 2.7V to 3.6V for M28256-xxW
LOW POWER CONSUMPTION
FAST WRITE CYCLE:
– 64 Bytes Page Write Operation
– Byte or Page Write Cycle
ENHANCED END of WRITE DETECTION:
– Data Polling
– Toggle Bit
STATUS REGISTER
HIGH RELIABILITY DOUBLE POLYSILICON,
CMOS TECHNOLOGY:
– Endurance >100,000 Erase/Write Cycles
– Data Retention >10 Years
JEDEC APPROVED BYTEWIDE PIN OUT
ADDRESS and DATA LATCHED ON-CHIP
SOFTWARE DATA PROTECTION
28
1
PDIP28 (BS)
PLCC32 (KA)
28
1
SO28 (MS)
300 mils
TSOP28 (NS)
8 x13.4mm
Logic Diagram
VCC
DESCRIPTION
The M28256 and M28256-Ware 32K x 8 low power
Parallel EEPROM fabricated with SGS-THOMSON
proprietary double polysilicon CMOS technology.
Signal Names
15
8
A0-A14
W
A0-A14
Address Input
E
DQ0-DQ7
Data Input / Output
G
W
Write Enable
E
Chip Enable
G
Output Enable
VCC
Supply Voltage
VSS
Ground
DQ0-DQ7
M28256
VSS
AI01885
B28256/711
Complete data available on DATA-on-DISC CD-ROM or at www.st.com
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M28256
1
28
2
27
3
26
4
25
5
24
6
23
7
22
M28256
8
21
9
20
10
19
11
18
12
17
13
16
14
15
VCC
W
A13
A8
A9
A11
G
A10
E
DQ7
DQ6
DQ5
DQ4
DQ3
A7
A12
A14
DU
VCC
W
A13
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
LCC Pin Connections
1 32
A6
A5
A4
A3
A2
A1
A0
NC
DQ0
9
M28256
25
A8
A9
A11
NC
G
A10
E
DQ7
DQ6
17
DQ1
DQ2
VSS
DU
DQ3
DQ4
DQ5
DIP Pin Connections
AI01886
AI01887
Warning: NC = Not Connected, DU = Don’t Use.
SO Pin Connections
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
DQ0
DQ1
DQ2
VSS
1
2
3
4
5
6
7
M28256
8
9
10
11
12
13
14
TSOP Pin Connections
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
W
A13
A8
A9
A11
G
A10
E
DQ7
DQ6
DQ5
DQ4
DQ3
G
A11
A9
A8
A13
W
VCC
A14
A12
A7
A6
A5
A4
A3
22
28
1
7
21
M28256
15
14
8
AI01888
AI01889
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A10
E
DQ7
DQ6
DQ5
DQ4
DQ3
VSS
DQ2
DQ1
DQ0
A0
A1
A2
M28256
ORDERING INFORMATION SCHEME
Example:
Speed
M28256 – 15
Operating Voltage
90
(1)
90ns
blank
4.5V to 5.5V
12
(1)
120ns
W
2.7V to 3.6V
15
20
25
(2)
W
KA 6
Package
BS PDIP28
KA PLCC32
150ns
MS SO28 300 mils
200ns
NS TSOP28
8 x 13.4mm
250ns
T
Temperature Range
1
(3)
6
0 to 70 °C
–40 to 85 °C
Option
T
Tape & Reel
Packing
Notes: 1. Not available for ”W” operating voltage.
2. Available for ”W” operating voltage only.
3. Temperature Range on request only.
Devices are shipped from the factory with the memory content set at all ”1’s” (FFh).
For a list of available options (Speed, Package, etc...) or for further information on any aspect of this device,
please contact the SGS-THOMSON Sales Office nearest to you.
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