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:
e3
Length:
12.8 mm
Moisture Sensitivity Level:
3
Number of Functions:
4
Number of Terminals:
20
Operating Temperature-Max:
70 °C
Out Swing-Min:
1.5 V
Output Characteristics:
3-STATE
Output Low Current-Max:
0.00004 A
Output Polarity:
TRUE
Package Body Material:
PLASTIC/EPOXY
Package Code:
SOP
Package Equivalence Code:
SOP20,.4
Package Shape:
RECTANGULAR
Package Style:
SMALL OUTLINE
Peak Reflow Temperature (Cel):
260
Qualification Status:
Not Qualified
Receive Delay-Max:
19 ns
Receiver Number of Bits:
4
Seated Height-Max:
2.65 mm
Supply Current-Max:
0.5 mA
Supply Voltage-Max:
5.25 V
Supply Voltage-Min:
4.75 V
Supply Voltage-Nom:
5 V
Supply Voltage1-Max:
5.25 V
Supply Voltage1-Min:
4.75 V
Supply Voltage1-Nom:
5 V
Surface Mount:
YES
Technology:
BIPOLAR
Temperature Grade:
COMMERCIAL
Terminal Finish:
Matte Tin (Sn) - annealed
Terminal Form:
GULL WING
Terminal Pitch:
1.27 mm
Terminal Position:
DUAL
Time@Peak Reflow Temperature-Max (s):
30
Transmit Delay-Max:
19 ns
Width:
7.5 mm
DS36954MX/NOPB 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 keeping the analog and digital grounds separate, using a solid ground plane, and minimizing noise coupling. Additionally, ensure that the input and output traces are routed away from each other to prevent signal coupling.
The power-up sequence is critical for the DS36954MX/NOPB. Ensure that the VCC supply is powered up before the VDD supply. Also, the VCC supply should be powered up slowly (less than 10 ms) to prevent latch-up. It's recommended to use a power-up sequence controller or a voltage supervisor to ensure a proper power-up sequence.
The DS36954MX/NOPB can drive a maximum capacitive load of 100 pF. Exceeding this limit may cause instability or oscillations. If you need to drive a higher capacitive load, consider adding a buffer or using a device with a higher drive capability.
To ensure EMC, follow good design practices such as using a shielded enclosure, keeping the device away from noise sources, and using a common-mode choke or ferrite bead on the input lines. Additionally, ensure that the PCB layout is designed to minimize radiation and susceptibility to electromagnetic interference (EMI).
The thermal derating for the DS36954MX/NOPB is typically 1.5°C/W above 25°C. This means that for every 1°C increase in ambient temperature above 25°C, the device's power rating decreases by 1.5%. Ensure that the device is properly heat-sinked and that the ambient temperature is within the recommended operating range.
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DS36954MX/NOPB 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.
