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PY291A-50DMB Datasheet(PDF) 4 Page - Pyramid Semiconductor Corporation

Part # PY291A-50DMB
Description  2K X 8 REPROGRAMMABLE PROM
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Manufacturer  PYRAMID [Pyramid Semiconductor Corporation]
Direct Link  http://www.pyramidsemiconductor.com
Logo PYRAMID - Pyramid Semiconductor Corporation

PY291A-50DMB Datasheet(HTML) 4 Page - Pyramid Semiconductor Corporation

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PY291A
Page 4 of 9
Document # EPROM101 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/cm2. If using a UV lamp of 12 mW/cm2, 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.
Read or Output Disable
A10-A0
CS3
CS2
CS1
O7-O0
Other
A10-A0
PGM
VFY
VPP
D7-D0
A10-A0
VIH
VIH
VIL
O7-O0
A10-A0
XX
VIH
High Z
A10-A0
XVIL
X
High Z
A10-A0
VIL
X
X
High Z
A10-A0
VILP
VIHP
VPP
D7-D0
A10-A0
VIHP
VILP
VPP
O7-O0
A10-A0
VIHP
VIHP
VPP
High Z
A10-A0
VILP
VIHP
VPP
D7-D0
A10-A0
VIHP
VILP
VPP
Zeros
Pin Function
Mode
Blank Check Zeros
Output Disable
Output Disable
Program
Program Verify
Read
Output Disable
Program Inhibit
Intelligent Program
MODE SELECTION
PROGRAMMING PINOUTS
X = Don't Care


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