CY7C266-20WC Cypress Semiconductor Corp, CY7C266-20WC Datasheet - Page 5

• Manufacturer Part Number: CY7C266-20WC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C266-20WC

• Density: 64Kb
• Organization: 8Kx8
• Access Time (max): 20ns
• Operating Current: 120mA
• Interface Type: Parallel
• Package Type: Windowed CDIP
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (typ): 5V
• Operating Temp Range: 0C to 70C
• Pin Count: 28
• Mounting: Through Hole
• Operating Supply Voltage (min): 4.5V
• Operating Supply Voltage (max): 5.5V
• Lead Free Status / RoHS Status: Not Compliant

Document #: 38-04005 Rev. *C
Erasure Characteristics
Wavelengths of light less than 4000 angstroms begin to erase
the devices in the windowed package. For this reason, an
opaque label should be placed over the window if the EPROM
is exposed to sunlight or fluorescent lighting for extended
periods of time.
The recommended dose of ultraviolet light for erasure is a
wavelength of 2537 angstroms for a minimum dose (UV
intensity multiplied by exposure time) of 25 Wsec/cm
ultraviolet lamp with a 12 mW/cm
would be approximately 35 minutes. The CY7C266 needs to be
within 1 inch of the lamp during erasure. Permanent damage may
Table 1. Mode Selection
Notes
Read
Standby
Output Disable
Program
Program Verify
Program Inhibit
Blank Check
4. X = “don’t care” but must not exceed V
5. Address A
Mode
8
–A
Normal Operation
12
must be latched through lines A
Program
A
A
A
A
A
4
3
2
/A
/A
/A
1
0
V
NC
/A
/A
NA
A
A
D
D
D
SS
2
A
12
11
10
7
5
9
8
0
1
2
6
power rating, the exposure time
CC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Top View
CerDIP
+ 5%.
7C266
0
–A
VFY
V
V
V
V
4
A
A
A
28
27
26
25
24
23
22
21
20
19
18
17
16
15
X
IHP
IHP
ILP
ILP
in Programming modes.
8
8
8
V
NC
NC
VFY
PGM
NA
V
LAT
CE
D
D
D
D
D
PP
PP
Figure 1. Programming Pinout
7
6
5
4
3
PGM
V
V
V
V
A
A
A
X
2
IHP
IHP
IHP
ILP
. For an
9
9
9
LAT
V
V
V
V
A
A
A
X
ILP
ILP
ILP
ILP
10
10
10
result if the EPROM is exposed to high-intensity UV light for an
extended period of time.
7258 Wsec/cm2 is the recommended maximum dosage.
Programming Modes
Programming support is available from Cypress as well as
from a number of third party software vendors. For detailed
programming information, including a listing of software
packages, please see the PROM Programming Information
located at the end of this section. Programming algorithms can
be obtained from any Cypress representative.
A
A
A
A
A
4
3
/A
/A
2
1
0
/A
/A
/A
NC
D
A
A
12
11
6
5
1
0
9
8
0
V
V
V
V
A
NA
A
A
X
Pin Function
ILP
ILP
ILP
ILP
11
11
11
5
6
7
8
9
10
11
12
13
14151617
LCC/PLCC
4
Top View
3 2 1
7C266
V
V
V
V
A
NA
A
A
X
32
ILP
ILP
ILP
ILP
181920
12
12
12
31
30
[4, 5]
29
28
27
26
25
24
23
22
21
CE
VFY
PGM
NA
NC
V
LAT
D
D
V
V
V
V
V
CE
CE
V
V
PP
7
6
ILP
ILP
ILP
ILP
IH
IL
IL
V
V
V
V
V
OE
V
V
X
PP
PP
PP
PP
PP
IH
IL
CY7C266
Three
Three
Three
Page 5 of 12
D
D
O
O
O
D
7
7
7
7
7
7
–D
–D
–O
-
-
–D
–O
-
–O
Stated
Stated
Stated
0
0
0
0
0
0
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