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PI7AT04
SOT
INY
TM
Low Voltage, Zero-Delay,
Active Transmission Line Clamp
Features
5V and 3.3V Line Clamping
Near Zero Quiescent Supply Current: 10µA Maximum
– Active circuit clamping
Low Capacitance: 5pF (typ.)
High 4kV ESD Protection
Packaging (Pb-free & Green Available):
- 6-pin SC70 (C)
Description
The PI7AT04 actively clamps overshoot and undershoot voltages
on transmission lines and backplanes. Improperly terminated data
lines have reflections that can result in lost data or unreliable
system behavior.
The PI7AT04 clamps undershoot and overshoot voltages for up
to four lines. For other options and packages contact Pericom
Marketing.
Compared to Schottky diodes, the PI7AT04 uses less power and
requires no additional drive power. By avoiding a passive termina-
tion/clamp technology, PI7AT04 power consumption is very low
at 5V.
The PI7AT04 is ideal in applications where characteristic imped-
ance varies with system configuration. Changing characteristic
impedance is common when memory or function cards are added
or removed on a bus.
The PI7AT04 does not replace parallel terminator resistors.
Benefits
Reduced EMI
– Limits high-frequency ring voltage
Minimum Power Consumption
Higher Noise Margin
Minimal Line Loading
Applications
CPU Termination
Backplane Termination
Termination
Product Pin Configuration
Product Pin Description
Pin Numbe r
6-pin, SC70
Name
T0
T1
T2
T3
GND
V
DD
De s cription
Line Termination
Line Termination
Line Termination
Line Termination
Ground
Positive Supply Voltage
T0
1
T1
2
GND
3
6-Pin
C
6
5
4
VDD
T3
T2
1
2
4
5
3
6
Functional Block Diagram
V
DD
Τ
0
Control
Input
Τ
3
1
PS8588C
08/02/04
PERICOM [ PERICOM SEMICONDUCTOR CORPORATION ]
