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PDF GS2988 Datasheet ( Hoja de datos )

Número de pieza GS2988
Descripción Dual-Slew-Rate / Cable Driver
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GS2988 datasheet

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GS2988 pdf
Table 1-1: Pin Descriptions
Pin Number
10
11, 12
14
16
Name
SD/HD
Type
Input
SDO/
SDO
OSP
Output
Output
EQ_EN
Input
Center Pad Power
Description
Control signal input.
When set HIGH, the serial data output will meet the SMPTE 259M rise/fall time
specification.
When set LOW, the serial output will meet the SMPTE 292M and SMPTE 424M rise/fall
time specification.
NOTE: if this pin is left floating, the serial data output will meet the SMPTE 259M
rise/fall time specification.
Serial data differential output.
Output signal presence status signal output.
Signal levels are LVCMOS/LVTTL compatible.
Indicates presence of a valid output signal.
When the OSP pin is LOW, a good input signal has been detected within the output
stage pre-driver.
When this pin is HIGH, the output signal is invalid at the output of the pre-driver.
Control signal input.
When set LOW, trace-equalization is turned ON.
When set HIGH, trace-equalization is turned OFF.
NOTE 1: if this pin is left floating, trace-equalization is turned OFF.
NOTE 2: this pin must be pulled HIGH or left floating for operation in SD mode.
Connect to most negative power supply plane following the recommendations in
Recommended PCB Footprint on page 15.
2. Electrical Characteristics
2.1 Absolute Maximum Ratings
Parameter
Value
Supply Voltage
-0.5V to 3.6 VDC
Input ESD Voltage
2.5kV
Storage Temperature Range
-50°C < Ts < 125°C
Input Voltage Range (any input)
-0.3 to (VCC +0.3)V
Operating Temperature Range
-40°C to +85°C
Solder Reflow Temperature
260°C
NOTE: Absolute Maximum Ratings are those values beyond which damage to the device may
occur. Functional operation under these conditions or at any other condition beyond those
indicated in the AC/DC Electrical Characteristic sections is not implied.
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s
Capability
Data Sheet
52131 - 4
December 2010
5 of 17
Free Datasheet http://www.datasheet4u.net/

5 Page

GS2988 arduino
Table 4-2: Slew Rate Selection
SD/HD
0
1
Floating
Rise/Fall Time
SMPTE 424M & 292M compliant
SMPTE 259M compliant
SMPTE 259M compliant
4.4 Output Disable
The GS2988 supports an output disable function for the serial data differential output.
Control of this function is determined by the setting of the DISABLE control pin.
The serial output disable (DISABLE), disables power to the entire device. When asserted
LOW, the SDO/SDO output driver is powered-down.
Table 4-3: Output Disable
DISABLE
0
1
Floating
SDO/SDO
All Chip Power Down
Operational
Operational
4.5 Output Signal Presence Indicator (OSP)
The GS2988 supports an output signal presence indicator function.
The output signal presence pin (OSP) is an active-low output that indicates when a valid
output signal has been detected at the pre-driver output.
The output signal presence function measures signal-edge energy to indicate that the
pre-driver to the serial data outputs is toggling.
Table 4-4: Output Signal Presence Indicator
Pre-Driver Output
Valid signal present
No valid signal present
OSP Pin
0
1
4.6 Output Amplitude (RSET)
The output amplitude of the GS2988 can be adjusted by changing the value of the RSET
resistor as shown in Figure 4-1. For an 800mVp-p output with a nominal ±7% tolerance,
a value of 750Ω is required. A ±1% SMT resistor should be used.
GS2988 Dual-Slew-Rate, Cable Driver with 3Gb/s
Capability
Data Sheet
52131 - 4
December 2010
10 of 17
Free Datasheet http://www.datasheet4u.net/

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