CY7C266-45PC Cypress Semiconductor Corp, CY7C266-45PC Datasheet - Page 5

• Manufacturer Part Number: CY7C266-45PC
• Manufacturer: Cypress Semiconductor Corp

Specifications of CY7C266-45PC

• Density: 64Kb
• Access Time (max): 45ns
• Supply Current: 120mA
• Pin Count: 28
• Mounting: Through Hole
• Operating Temperature Classification: Commercial
• Lead Free Status / Rohs Status: Not Compliant

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
Document #: 38-04005 Rev. *B
Read
Standby
Output Disable
Program
Program Verify
Program Inhibit
Blank Check
Notes:
Mode
4.
5.
X = “don’t care” but must not exceed V
Address A
8
Normal Operation
–A
12
must be latched through lines A
Program
A
A
A
A
A
4
3
2
/A
/A
/A
1
0
V
NC
NA
/A
/A
D
D
D
2
A
A
A
SS
12
11
10
7
6
5
9
8
0
1
2
power rating, the exposure time
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CC
Top View
CerDIP
7C266
+ 5%.
0
–A
VFY
V
V
V
V
A
A
A
28
27
26
25
24
23
22
21
20
19
18
17
16
15
X
IHP
IHP
ILP
ILP
4
8
8
8
in Programming modes.
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
ILP
ILP
ILP
ILP
Pin Function
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
A
A
NA
X
32
ILP
ILP
ILP
ILP
181920
12
12
12
31
30
[4, 5]
29
28
27
26
25
24
23
22
21
CE
D
D
V
V
V
V
VFY
PGM
NA
NC
V
LAT
CE
CE
V
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
Three
Three
Three
CY7C266
D
D
O
O
O
D
Page 5 of 11
7
7
7
7
7
7
–D
–D
–O
-
-
–D
–O
-
–O
Stated
Stated
Stated
0
0
0
0
0
0