PY291A Datasheet, PDF (4/9 Pages) Pyramid Semiconductor Corporation – 2K X 8 REPROGRAMMABLE PROM

PY291A
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.
MODE SELECTION
Mode
Read or Output Disable
Other
Read
Output Disable
Output Disable
Output Disable
Program
Program Verify
Program Inhibit
Intelligent Program
Blank Check Zeros
X = Don't Care
A₁₀-A₀
A₁₀-A₀
A₁₀-A₀
A₁₀-A₀
A₁₀-A₀
A₁₀-A₀
A₁₀-A₀
A₁₀-A₀
A₁₀-A₀
A₁₀-A₀
A₁₀-A₀
Pin Function
CS₃
PGM
V_IH
X
X
V_IL
V_ILP
V_IHP
V_IHP
V_ILP
V_IHP
CS₂
VFY
V_IH
X
V_IL
X
V_IHP
V_ILP
V_IHP
V_IHP
V_ILP
CS₁
V_PP
V_IL
V_IH
X
X
V_PP
V_PP
V_PP
V_PP
V_PP
O₇-O₀
D₇-D₀
O₇-O₀
High Z
High Z
High Z
D₇-D₀
O₇-O₀
High Z
D₇-D₀
Zeros
PROGRAMMING PINOUTS
Document # EPROM101 REV OR
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