LTC2856CMS8-1#PBF Analog Devices Integrated Circuit (Small Outline Packages) In Stock
Analog Devices LTC2856CMS8-1#PBF is an automotive-grade single RS-422/RS-485 line transceiver with differential Schmitt trigger input, 250 µA high-level input current, and TIA-485-A compliance in an 8-pin MSOP package for robust half-duplex serial communication.
- Manufacturer
- Analog Devices
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- ACTIVE
- Datasheet
- LTC2856CMS8-1#PBF Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $2.2250(MOQ 19)
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- RS-422/RS-485 compliant single transmitter/receiver with differential Schmitt trigger input for superior noise immunity on long cable runs
- Automotive-grade qualification with 250 µA high-level input current specification ensuring fail-safe operation under open, short, or terminated bus conditions
- 8-pin MSOP compact package with half-duplex operation supporting multi-drop networks of up to 32 unit loads on a single differential bus
Applications
The LTC2856CMS8-1#PBF is designed for automotive and industrial half-duplex RS-485 communication networks connecting ECUs, sensors, and actuators over distances up to 1200 m at 100 kbps or 10 m at 20 Mbps. Its differential Schmitt trigger receiver provides robust noise rejection for harsh electromagnetic environments found in automotive engine compartments and factory floors with variable-frequency motor drives. The device is also suitable for building automation networks using Modbus RTU, DMX512 lighting control, and PROFIBUS DP interfaces where a single-chip transceiver simplifies PCB layout.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1660 |
| YTEOL | 8.5 |
| Differential Output | YES |
| Driver Number of Bits | 1 |
| High Level Input Current-Max | 0.00025A |
| Input Characteristics | DIFFERENTIAL SCHMITT TRIGGER |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-485-A; TIA-485-A |
| JESD-30 Code | S-PDSO-G8 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Out Swing-Min | 1.5V |
| Output Characteristics | 3-STATE |
| Output Low Current-Max | 0.004A |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Receive Delay-Max | 70ns |
| Receiver Number of Bits | 1 |
| Supply Current-Max | 1.1mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.5V |
| Supply Voltage-Nom | 5V |
| Supply Voltage1-Max | 5.5V |
| Supply Voltage1-Min | 4.5V |
| Supply Voltage1-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transmit Delay-Max | 50ns |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the LTC2856CMS8-1's differential Schmitt trigger input improve signal integrity on a 100-meter RS-485 cable compared to standard RS-485 receivers?
The differential Schmitt trigger input of the LTC2856CMS8-1 provides approximately 50 mV of hysteresis on the differential signal threshold, preventing false triggering from reflections and noise on 100-meter twisted-pair cables that can inject 30 mV to 80 mV of common-mode disturbance from motor drives and switching power supplies. Standard RS-485 receivers without Schmitt hysteresis may chatter during bus transitions, causing data errors at bit rates above 50 kbps on long cable runs. The LTC2856CMS8-1's fail-safe design maintains a defined output state even with open, short, or terminated bus conditions, reducing fault recovery time from seconds to zero in Modbus RTU networks.
For an automotive body area network using RS-485, how many LTC2856CMS8-1 nodes can share a single differential bus, and what termination resistance is needed?
Each LTC2856CMS8-1 presents 1/8 unit load to the RS-485 bus, allowing up to 256 nodes on a single differential line before exceeding the 32-unit-load maximum specified by TIA-485-A, compared to only 32 nodes with standard 1-unit-load transceivers. For a 100 kbps automotive bus spanning 50 meters of 120-ohm twisted-pair cable, a single 120-ohm termination resistor at each end maintains signal integrity and prevents reflections that degrade bit timing below 5% of the bit period. The 250 µA maximum input current per node means that at 256 nodes, the bus driver must supply only 64 mA during simultaneous reception, well within the LTC2856CMS8-1's driver output capability.
When selecting between the LTC2856CMS8-1 and LTC2856CMS8-2 for a Modbus RTU industrial sensor network, what design factors determine the better choice?
The LTC2856CMS8-1 variant is configured for half-duplex operation with a single driver enable pin, making it the correct choice for Modbus RTU networks where master and slave share a 2-wire RS-485 bus and the protocol controls direction via a single GPIO. The LTC2856CMS8-2 provides a separate receiver enable, offering independent transmit and receive path control suited for full-duplex RS-422 point-to-point links where both directions must be active simultaneously at data rates up to 20 Mbps. For a 32-node Modbus RTU factory sensor network at 9600 bps on 500-meter cable, the LTC2856CMS8-1 in 8-pin MSOP simplifies firmware direction control and reduces GPIO usage by 1 pin per node compared to the dual-enable variant.
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About Analog Devices
Analog Devices (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing integrated circuits used in virtually all types of electronic equipment.
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| 19+ | $2.7200 | $51.68 |
| 250+ | $2.4562 | $614.05 |
| 500+ | $2.2768 | $1138.39 |
| 1000+ | $2.2250 | $2225.00 |
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