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參數(shù)資料
| 型號(hào)： | PY264-55WC |
| 廠商： | PYRAMID SEMICONDUCTOR CORP |
| 元件分類： | DRAM |
| 英文描述： | 8K X 8 REPROGRAMMABLE PROM |
| 中文描述： | 8K X 8 UVPROM, 55 ns, CDIP24 |
| 封裝： | 0.600 INCH, WINDOWED, CERAMIC, DIP-24 |
| 文件頁(yè)數(shù)： | 4/8頁(yè) |
| 文件大小： | 146K |
| 代理商： | PY264-55WC |
PY264
Page 4 of 8
Document #
EPROM102
REV OR
DEVICE ERASURE
If the device is subjected to wavelengths of light below
4000 Angstroms, device erasure will commence. It is
therefore recommended to use an opaque label over the
window in the event the device will be exposed to lighting
for a long time. The UV dose for erasure requires a
wavelength of 2,537 Angstroms for a minimum dose of
25 Wsec/cm
2
. If using a UV lamp of 12 mW/cm
2
, the
exposure time is estimated to be 35 minutes. Devices
should be positioned within 1 inch of the lamp during the
erasure process. Permanent damage can occur to the
devices if exposed to UV light for an extended period of
time.
MODE SELECTION
PROGRAMMING PINOUTS
Read or Output Disable
A
12
A
11
A
10
A
9
A
8
CS
O
7
-O
0
Program
NA
Vpp
LATCH
PGM
VFY
CS
D
7
-D
0
A
12
A
11
A
10
A
9
A
8
V
IL
O
7
-O
0
A
12
A
11
A
10
A
9
A
8
V
IH
High Z
V
ILP
Vpp
V
ILP
V
ILP
V
IHP
V
ILP
D
7
-D
0
V
ILP
Vpp
V
ILP
V
IHP
V
IHP
V
ILP
High Z
V
ILP
Vpp
V
ILP
V
IHP
V
ILP
V
ILP
O
7
-O
0
V
ILP
Vpp
V
ILP
V
IHP
V
ILP
V
ILP
O
7
-O
0
Pin Function
Program Verify
Blank Check
Program
Program Inhibit
Mode
Read
Output Disable
READ MODE
Reading the addressed content is the normal operating
mode for a programmed device. Signals are at normal
TTL levels. Addressing is applied to the 13 address pins
and
CS
is LOW. Under these conditions, the addressed
location contents are presented to the output pins.
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