PALCE26V12 Datasheet, PDF (18/21 Pages) Advanced Micro Devices – 28-Pin EE CMOS Versatile PAL Device

ROBUSTNESS FEATURES
The PALCE26V12 has some unique features that make
it extremely robust, especially when operating in high
speed design environments. Input clamping circuitry
limits negative overshoot, eliminating the possibility of
AMD
false clocking caused by subsequent ringing. A special
noise filter makes the programming circuitry completely
insensitive to any positive overshoot that has a pulse
width of less than about 100 ns.
INPUT/OUTPUT EQUIVALENT SCHEMATICS FOR REV. B VERSION*
VCC
VCC
> 50 kΩ
ESD
Protection
and
Clamping
Programming
Pins only
Programming
Voltage
Detection
Typical Input
Positive
Overshoot
Filter
Programming
Circuitry
VCC
VCC
> 50 kΩ
Provides ESD
Protection and
Clamping
Typical Output
Preload Feedback
Circuitry Input
16072E-16
* _Device
PALCE26V12-15
PALCE26V12-20
Rev. Letter
B
Topside Marking:
AMD CMOS PLD’s are marked on top of the package in the
following manner:
PALCE xxxx
Datecode (4 numbers) LOT ID (3 characters) – – (Rev. Letter)
The Lot ID and Rev. letter are separated by two spaces.
PALCE26V12 Family
2–323