ACTIVE
Part Number
UM3481
Description
±18V Fault-Protected, 3V to 5.5V, RS-485 Transceiverswith IEC ESD
Status
ACTIVE
Drivers/Receivers Per Package
1/1
Max Date rate (Mbps)
1
Bus Fault Protection (V)
-18 to 18
Common-mode range (V)
-15 to 15
VCC Range (V)
3.0 to 5.5
VIO Range (V)
-
ICC (Max) (mA)
3
ESD HBM (kV)
±18
IEC 61000-4-2 Contact (kV)
±9
Operating Temperature Range(℃)
-40 to 125
Package
DFN8 3.0x3.0, MSOP8, SOP8
UM3481 is ±18V fault-protected, half-duplex, RS-485 transceivers operating on a single 3V to 5.5V supply voltage. Bus interface pins are protected against overvoltage conditions during all modes of operation ensuring robust communication in rugged industrial environments.
UM3481 is available in 1Mbps. The device also features integrated IEC ESD protection, eliminating the need for external system-level protection components. Extended ±15V input common-mode range ensures reliable data communication over longer cable run lengths and/or in the presence of large ground loop voltages. Enhanced 250mV receiver hysteresis provides high noise rejection. In addition, the receiver fail-safe feature provides a logic high when the bus inputs are open or shorted together.
- Meets or exceeds the requirements of the TIA/EIA-485A standards
- 3V to 5.5V supply voltage
- Differential output exceeds 2.1 V for PROFIBUS compatibility with 5V supply
- Data Rates up to 1Mbps
- Bus I/O protection
-- ±18V DC bus fault
-- ±18kV Human body model (HBM)
-- ±9kV IEC 61000-4-2 contact discharge
- Latch-up performance exceeds 800mA per JESD 78
- Extended operational common-mode range: ±15V
- Glitch-free power-up/down for hot plug-in capability
- Undervoltage lockout
- Extended ambient temperature range: -40°C to 125°C
- Enhanced receiver hysteresis for noise immunity
- Open, short, and idle bus failsafe
- Thermal shutdown
- 1/8 unit load (up to 256 bus nodes)
- Automotive data links
- Industrial-Control Local Area Networks
- Integrated Services Digital Networks
- Electricity meters
- Building automation
- Transceivers for EMI-Sensitive applications
| Part Number | Packaging Type | Marking Code | Shipping Qty |
|---|---|---|---|
| UM3481EESA | SOP8 | UM3481EESA | 3000pcs/13Inch Tape & Reel |
| UM3481EEM8 | MSOP8 | 3481 | 4000pcs/13Inch Tape & Reel |
| UM3481EEDA | DFN8 3.0×3.0 | 3481 | 3000pcs/13Inch Tape & Reel |
