COMMON I/O; 4 RECEIVERS ACTIVE UNDER SHUTDOWN; TRISTATABLE RECEIVERS; INDIVIDUAL DRIVER ENABLES
Differential Output:
YES
Driver Number of Bits:
4
High Level Input Current-Max:
0.00004 A
Input Characteristics:
DIFFERENTIAL SCHMITT TRIGGER
Interface IC Type:
LINE TRANSCEIVER
Interface Standard:
EIA-485
JESD-30 Code:
R-PDSO-G20
JESD-609 Code:
e0
Length:
12.8 mm
Moisture Sensitivity Level:
2A
Number of Functions:
4
Number of Terminals:
20
Operating Temperature-Max:
70 °C
Out Swing-Min:
1.5 V
Output Low Current-Max:
0.004 A
Package Body Material:
PLASTIC/EPOXY
Package Code:
SOP
Package Equivalence Code:
SOP20,.4
Package Shape:
RECTANGULAR
Package Style:
SMALL OUTLINE
Peak Reflow Temperature (Cel):
220
Qualification Status:
Not Qualified
Receive Delay-Max:
19 ns
Receiver Number of Bits:
4
Seated Height-Max:
2.642 mm
Supply Current-Max:
90 mA
Supply Voltage-Max:
5.25 V
Supply Voltage-Min:
4.75 V
Supply Voltage-Nom:
5 V
Surface Mount:
YES
Technology:
BIPOLAR
Temperature Grade:
COMMERCIAL
Terminal Finish:
TIN LEAD
Terminal Form:
GULL WING
Terminal Pitch:
1.27 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
20
Transmit Delay-Max:
19 ns
Width:
7.5 mm
DS36954M Frequently Asked Questions (FAQs)
Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good PCB design practices, such as separating analog and digital grounds, using a solid ground plane, and minimizing trace lengths and loops. Additionally, place decoupling capacitors close to the device and use a low-ESR capacitor for the VCC pin.
The DS36954M requires a power-on reset (POR) circuit to ensure proper initialization. A simple POR circuit can be implemented using a resistor, capacitor, and diode. Additionally, the device requires a clock signal to be applied before the power supply reaches its operating range. Refer to the datasheet for specific guidelines on power-up sequencing.
The maximum clock frequency for the DS36954M is 100 MHz. However, the device can operate at lower frequencies, and the clock frequency should be chosen based on the specific application requirements. It's essential to ensure the clock signal meets the device's input requirements and is free from noise and jitter.
The DS36954M has a maximum junction temperature of 150°C. To ensure reliable operation, it's essential to provide adequate heat sinking and thermal management. Use a thermal pad or heat sink on the exposed pad of the QFN package, and ensure good airflow around the device. Monitor the device's temperature and adjust the thermal design as needed.
The recommended termination resistors for the DS36954M's outputs depend on the specific application and transmission line characteristics. As a general guideline, use a series termination resistor of 50-75 ohms for single-ended outputs and 25-37.5 ohms for differential outputs. Consult the datasheet and application notes for more detailed information.
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DS36954M Overview
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
