PALCE22V10 LATTICE [Lattice Semiconductor], PALCE22V10 Datasheet - Page 29
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PALCE22V10
Manufacturer Part Number
PALCE22V10
Description
24-Pin EE CMOS (Zero Power) Versatile PAL Device
Manufacturer
LATTICE [Lattice Semiconductor]
Datasheet
1.PALCE22V10.pdf
(34 pages)
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ROBUSTNESS FEATURES
The PALCE22V10X-X/5 devices have some unique features that make them extremely robust,
especially when operating in high-speed design environments. Pull-up resistors on inputs and I/O
pins cause unconnected pins to default to a known state. Input clamping circuitry limits negative
overshoot, eliminating the possibility of 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 for the /5 version.
INPUT/OUTPUT EQUIVALENT SCHEMATICS FOR /5 VERSION DEVICES
Protection
Clamping
ESD
and
> 50 k
V
CC
PALCE22V10 and PALCE22V10Z Families
Programming
Pins only
Provides ESD
Protection and
Clamping
V
CC
Typical Output
Typical Input
V
CC
Programming
Detection
Voltage
> 50 k
V
Circuitry
Preload
CC
Overshoot
Positive
Filter
Feedback
Input
Programming
Circuitry
16564-16
29