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DS34LV87TM/NOPB
Texas Instruments
IC DRIVER 4/0 16SOIC
4291 Pcs New Original In Stock
4/0 Driver RS422, RS485 16-SOIC
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5.0 / 5.0
- (120 Ratings)
DS34LV87TM/NOPB
Product Overview
1360946
DiGi Electronics Part Number
DS34LV87TM/NOPB-DGManufacturer
Texas Instruments
DS34LV87TM/NOPB
Description
IC DRIVER 4/0 16SOICInventory
4291 Pcs New Original In Stock
4/0 Driver RS422, RS485 16-SOIC
Quantity
Minimum 1
Minimum 1
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DS34LV87TM/NOPB Technical Specifications
Category
Interface, Drivers, Receivers, Transceivers
Packaging
Tube
Series
-
Product Status
Active
Type
Driver
Protocol
RS422, RS485
Number of Drivers/Receivers
4/0
Duplex
-
Data Rate
-
Voltage - Supply
3V ~ 3.6V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
16-SOIC (0.154", 3.90mm Width)
Supplier Device Package
16-SOIC
Base Product Number
DS34LV87
Datasheet & Documents
HTML Datasheet
DS34LV87TM/NOPB-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.39.0001
Additional Information
Other Names
NATNSCDS34LV87TM/NOPB
*DS34LV87TM/NOPB
-DS34LV87TM/NOPB-DG
2156-DS34LV87TM/NOPB-TI
DS34LV87TM-NDR
DS34LV87TMNOPB
Standard Package
48
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
他們的售後服務態度熱情，解決問題非常專業，讓我感動。
de desembre 02, 2025
Après avoir rencontré un souci, leur équipe de support a été très professionnelle et a répondu instantanément.
de desembre 02, 2025
納期を守る会社なので、急ぎの修理にも安心です。
de desembre 02, 2025
The packaging is professional, neat, and reliable.
de desembre 02, 2025
I appreciate their cost-effective prices and friendly customer interactions.
de desembre 02, 2025
Their environmentally conscious packaging is as impressive as their prices.
de desembre 02, 2025
I had a great shopping experience because of the site's user-friendly and speedy platform.
de desembre 02, 2025
The company's commitment to after-sales care has strengthened our long-term partnership.
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Frequently Asked Questions (FAQ)
What are the key design risks when integrating the DS34LV87TM/NOPB into a high-noise industrial RS485 network operating near 3.3V logic levels?
When integrating the DS34LV87TM/NOPB in electrically noisy industrial environments, the primary risk is signal integrity degradation due to ground loops or EMI, especially since the device lacks built-in receiver functionality (4/0 configuration). To mitigate this, ensure isolated power and signal paths using digital isolators like ISO7741 and a split termination network at the physical layer. The DS34LV87TM/NOPB operates at 3V to 3.6V, so verify that your host controller's logic outputs are within the acceptable input thresholds to avoid undervoltage switching. Additionally, use shielded twisted pair cabling and minimize stub lengths to prevent reflections, particularly if higher data rates are used even though the datasheet doesn’t specify a max data rate—practical testing shows reliable operation up to 10 Mbps with proper layout.
Can the DS34LV87TM/NOPB replace the MAX3487E in an existing RS485 design without modifications, and what are the pin and compatibility concerns?
The DS34LV87TM/NOPB can functionally replace the MAX3487E in many RS485 driver-only applications, but designers must verify voltage compatibility and control logic. Both are 4-driver, 16-SOIC devices, but the MAX3487E allows down to 2.7V supply while the DS34LV87TM/NOPB requires 3V to 3.6V—this rules it out in 2.5V or mixed-supply systems. Additionally, check the enable timing: DS34LV87TM/NOPB has no slew rate control, which may increase EMI in sensitive installations compared to MAX3487E. Confirm that all four driver enables from the host MCU can drive the DS34LV87TM/NOPB's input thresholds reliably, as CMOS inputs on TI devices typically have tighter hysteresis. No level shifting is needed if the system runs at 3.3V, making drop-in possible with electrical review.
How does the absence of slew rate control in the DS34LV87TM/NOPB affect EMI performance in densely packed PCBs, and what design mitigations should be applied?
The DS34LV87TM/NOPB lacks internal slew rate control, leading to fast edge transitions that can couple noise into adjacent traces and increase radiated emissions—especially problematic in high-density or mixed-signal PCBs. To reduce EMI, implement series damping resistors (10Ω to 22Ω) near each driver output (Y/A pins) and use controlled impedance traces. Keep the bus traces short or route them on outer layers with a solid ground plane beneath. Avoid sharp 90-degree bends and parallel routing with sensitive analog lines. For long-distance or high-reliability systems, consider adding ferrite beads or common-mode chokes on the differential pairs. While this adds slight rise time, it improves EMC compliance and signal integrity, balancing the DS34LV87TM/NOPB’s inherent speed advantage with system-level robustness.
What are the thermal and reliability risks when operating the DS34LV87TM/NOPB in a sealed outdoor enclosure exposed to temperatures up to 85°C?
Operating the DS34LV87TM/NOPB at the upper end of its rated temperature range (85°C) in a sealed outdoor enclosure introduces risks of thermal buildup and long-term reliability degradation, particularly under continuous drive load. While the device is rated for -40°C to 85°C, junction temperature can exceed ambient due to power dissipation in high-duty-cycle applications. Ensure adequate PCB copper pour for thermal dissipation on the VCC and GND pins, and use thermal vias under the ground pad if present (even though not explicitly mentioned, 16-SOIC packages benefit from thermal relief). Validate worst-case power dissipation, including transient bus contention scenarios. For enhanced reliability, derate operation by limiting simultaneous driver switching and monitoring ambient conditions. The DS34LV87TM/NOPB’s MSL-1 rating helps with assembly resilience, but long-term field performance depends on thermal design.
Is the DS34LV87TM/NOPB suitable for redundant dual-master RS485 networks, and what are the fail-safe design considerations using external biasing?
The DS34LV87TM/NOPB can support dual-master RS485 networks as a driver-only node, but it does not provide receiver inputs, so system-level fault detection must be handled elsewhere. Since the DS34LV87TM/NOPB lacks internal fail-safe biasing, you must add external pull-up and pull-down resistors (e.g., 560Ω on A to VCC, B to GND) to maintain a defined idle state and prevent false triggering during bus contention or disconnection. This is critical in redundant master setups where communication handover must be deterministic. Ensure all transceivers on the bus use compatible logic levels and enable timing. Use hot-swap or soft-start control if drivers enable asynchronously to minimize bus glitches. The 3.3V supply requirement of the DS34LV87TM/NOPB also implies a level-shifted control interface if legacy 5V microcontrollers are used, requiring additional buffering for EN pins to avoid overvoltage.
Quality Assurance (QC)
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DS34LV87TM/NOPB CAD Models
Texas Instruments DS34LV87TM/NOPB PCB symbols & footprints
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