8 7 6 5
7 6
10 9 8
1 2 3 4
5
1 2 3 4
V
V
V
PI3VST01
HPD signal Generator for VGA
Description
Features
e VTh GA connector does not have a hot-plug pin to tell the sys -
Hot Plug Detect Signal Generator for VGA connectors
tem that a monitor is connected. More recent video standards,
Generates hot plug output signal telling system when
such as HDMI and DisplayPort, save power by adding a hot-plug
monitor is present or not
pin which allows graphics outputs to be powered down when a
Power Supply, 3.3V and 5.0V
monitor is not connected.
ESD tolerance on pin 7 is up to +/-4kV contact per
IEC61000-4-2 specification
Pericoms PI3VST01 HPD signal generator generates a monitor
-3dB BW of 1.7GHz (typ)
detection signal from a VGA source connector to tell the VGA
4.75 Ohm On Resistance with 0.5 Ohm flatness (typ)
source if an external monitor is connected or not.
Low input/output capacitance (Con = 4.5pF, typ)
Packaging (Pb-free and Green):
PI3VST01 allows notebook makers to shut off the VGA DAC
when a monitor is not connected, thus saving 170 mW per DAC.
8-contact MSOP (U)
PI3VST01 dissipates only 0.66 mW.
10-contact TDFN (ZE)
e mTh onitor detection scheme within the PI3VST01 will not
affect normal operation of the video driver.
Block Diagram Pin Configuration-U8 (Top View)
HPD_OUT
GND
V
V DD3
DD5
BOUT
BIN
BOUT
BIN
Rref
VSYNC
Logic
HPD_OUT Pin Configuration-ZE10 (Top View)
VSYNC Detector
Control
HPD_OUT
GND
RREF
VDD5 VDD3
NC
NC
BOUT
BIN
Rref
VSYNC
01/04/13
12-0303 1PI3VST01
HPD signal Generator for VGA
Pinout Table
ZE-10 Pin # U-8 Pin # Pin Name I/O Type Description
1 1 GND Ground Ground
2 2 V Power 5V 10% power rail
DD5
4 3 BIN I Blue input from VGA source
5 4 VSYNC I Ver t ic a l Sy nch roni z at ion sig na l, i nter na l 250KOh m pu l ldow n
Open drain output, telling the system the status of the external VGA
10 8 HPD_OUT O monitor. If VGA monitor is present, this pin will be pulled low. If
VGA monitor is not present, this pin will be Hi-z
9 7 Power 3.3V 10% power rail
V
DD3
7 6 BOUT O Blue output to VGA connector
Determines IC mode in terms of impedance detection levels. con-
6 5 Rref I/O nect to external resistor to GND. Resistor values can be determined
by looking at truth table
01/04/13
12-0303 2