Figure 1. Pin connections (top…

Figure 1. Pin connections (top…

STMicroelectronicsSwitzerland

ST485EXN

ObsoleteDrivers, Receivers, TransceiversDIP-8

IC TRANSCEIVER HALF 1/1 8DIP

ST485EXN is an RS-485/RS-422 half-duplex transceiver with single 5V supply, operating temperature -55 to 125°C, DIP-8 package, featuring ±15KV ESD protection and thermal shutdown.Checked against the datasheet

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Technical parameters

Key specs

ProtocolRS-485
Drivers/Receivers1
Data rate5 MbpsMax
Supply voltage5 ~ 7 V

Datasheet-verified parameters

22 items
ParameterValue and test conditionsSource
ProtocolRS-485, RS-422
Drivers / Receivers1 driver, 1 receiver
Supply Voltage5V ± 5% (Typical operating), 7V (Absolute Max)
PackageDIP-8
Operating Temperature-55 to 125 °C
GradeIndustrial (implied by -55 to 125°C range, not explicitly labeled as 'Industrial' in text)
Quiescent Current300 µA (Typ), 500 µA (Max) at VCC=5V, VRE=0V or VCC, VDE=0V
Common Mode Input Voltage Range-7V to 12V
Input Hysteresis70 mV (Typ) at VCM=0V
Propagation Delay30 ns (Typ), 45 ns (Max) at RDIFF=54Ω, CL=100pF
Skew5 ns (Typ), 5 ns (Max) at RDIFF=54Ω, CL=100pF
ESD Protection (HBM)±15 KV
ESD Protection (IEC-1000-4-2)±8 KV (Contact discharge)
Driver Short-Circuit Current35 mA (Min), 250 mA (Max) at VO=-7 to 12V
Receiver Short-Circuit Current7 mA (Min), 95 mA (Max) at VO=0V to VCC
Differential Driver Output Voltage (No Load)5 V (Max)
Differential Driver Output Voltage (With Load)1.5 V (Min), 55 V (Max) at RL=27Ω (RS-485) or 50Ω (RS-422)
Receiver Threshold Voltage-0.2 V (Min), 0.2 V (Max) at VCM=-7 to 12V
Receiver Input Resistance24 KΩ (Min) at VCM=-7 to 12V
Absolute Maximum Rating - Supply Voltage7 V
Absolute Maximum Rating - Driver Output Voltage±14 V
Absolute Maximum Rating - Receiver Input Voltage±14 V
All parameters (16)ExpandCollapse
Power
Voltage - Supply4.75V ~ 5.25V
Environment and package
Mounting TypeThrough Hole
Operating Temperature-55°C ~ 125°C
PackageTube
Package / Case8-DIP (0.300", 7.62mm)
Supplier Device Package8-DIP
Other
Base Product NumberST485
Data Rate5Mbps
DuplexHalf
MfrSTMicroelectronics
Number of Drivers/Receivers1/1
Product StatusObsolete
ProtocolRS422, RS485
Receiver Hysteresis70 mV
Series-
TypeTransceiver

Pinout and package

Figure 1. Pin connections (top…
Figure 1. Pin connections (top…
Package: DIP-8
PinNameFunctionSource
1Receiver output (RO)
2Receiver output enable (RE)
3Driver output enable (DE)
4Driver input (DI)
5Ground (GND)
6Non-inverting receiver input and non-inverting driver output (A)
7Inverting receiver input and inverting driver output (B)
8Supply voltage (VCC)

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DatasheetDatasheet · 303.8 KB · 2026-10-26
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