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ST3485EBDR on a board, in 3D

ST3485EBDR

STMicroelectronics

-40℃~+85℃ 1 1 12Mbps 2.2mA 3V~3.6V 64 Half-Duplex Transceiver ±15kV SO-8 RS-485 / RS-422 ICs ROHS

Extended
DatasheetJLCPCBLCSCst/ST3485EBDR
Category
RS 485 , RS 422 ICs
Package
SO-8
Pins
8

Overview

The ST3485EBDR is a RS 485 , RS 422 IC made by STMicroelectronics in a SO-8 package with 8 pins. -40℃~+85℃ 1 1 12Mbps 2.2mA 3V~3.6V 64 Half-Duplex Transceiver ±15kV SO-8 RS-485 / RS-422 ICs ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:SN75176ADR-MS, from EasyEDA) and its footprint (Package_SO:SOIC-8_3.9x4.9mm_P1.27mm, from KiCad's library), ready for a KiCad board. 14,407 are in stock at JLCPCB (part C75809). 5 open-source boards in 5 repositories on GitHub use it.

Symbol

RO1RE#2DE3DI4GND5A6B7VCC8
EasyEDA_Cloud:SN75176ADR-MSFrom EasyEDA

Footprint

12345678
Package_SO:SOIC-8_3.9x4.9mm_P1.27mmFrom KiCad's library

From the datasheet

10
Supply, least
3 V · VCC, recommended operating min · p. 3
Supply, most
3.6 V · VCC, recommended operating max · p. 3
Supply, absolute maximum
7 V · VCC, absolute max · p. 5
Works from
-40 °C · Operating ambient min, ST3485EBDR · p. 21
Works up to
85 °C · Operating ambient max, ST3485EBDR · p. 21
Takes working
1.3 mA · VCC typical, no load, driver enabled · p. 6
Takes at most
2.2 mA · VCC max, no load, driver enabled · p. 6
Takes asleep
2 nA · VCC typical shutdown, DE = 0 V, RE = VCC · p. 6
Data rate, most
12 Mbit/s · Guaranteed maximum data rate, min · p. 8
Edge
12 ns · Differential output transition time typical, RL = 60 Ω, CL = 15 pF · p. 8

What it is and has

7
ESD protection
±15 kV IEC 61000-4-2 air discharge · p. 1
ESD protection
±8 kV IEC 61000-4-2 contact discharge · p. 1
Logic compatibility
Interoperable with 5 V logic · p. 1
Data rate
Guaranteed 12 Mbps · p. 1
Bus capacity
Up to 64 transceivers · p. 1
Package
SO8 · p. 1
Pinout
Industry standard 75176 · p. 1

Specifications

48
ParameterConditionsAs printedPage
Supply voltage VCCmax 7 V5
Control input voltage ( RE , DE) VImin -0.3 · max 7 V5
Driver input voltage (DI) VDImin -0.3 · max 7 V5
Driver output voltage (A, B) VDOmin -14 · max 14 V5
Receiver input voltage (A, B) VRImin -14 · max 14 V5
Receiver output voltage (RO) VROUpper limit is VCC + 0.3 V.min -0.3 V5
HBM: human body model for the line inputs (A and B) ESDHuman body model, note (1)max 12 kV5
HBM: human body model for all other pins ESDHuman body model, note (1)max 2 kV5
CDM: charged device model ESDNote (2)max 1.5 kV5
VCC power supply current ISUPPLYST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; no load, DI = 0 V or VCC; DE = VCC, RE = 0 V or VCCtyp 1.3 · max 2.2 mA6
VCC power supply current ISUPPLYST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; no load, DI = 0 V or VCC; DE = 0 V, RE = 0 Vtyp 1.2 · max 1.9 mA6
Shutdown supply current ISHDNST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; DE = 0 V, RE = VCC, DI = 0 V or VCCtyp 0.002 · max 1 uA6
Input logic threshold low VILST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; DE, DI, REtyp 1.3 · max 0.8 V6
Input logic threshold high VIHST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; DE, DI, REmin 2 V6
Input current (A, B) IIN2ST3485EBDR; TA = -40 to 85 °C; DE = 0 V, VCC= 0 or 3.6 V; VIN = 12 Vmax 1 mA6
Input current (A, B) IIN2ST3485EBDR; TA = -40 to 85 °C; DE = 0 V, VCC= 0 or 3.6 V; VIN = -7 Vmax -0.8 mA6
Differential drive output VODST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; RL= 100 Ω (RS-422) (Figure 2)min 2 V7
Differential drive output VODST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; RL= 54 Ω (RS-485) (Figure 2)min 1.5 V7
Differential drive output VODST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; RL= 60 Ω (RS-485) (Figure 3)min 1.5 V7
Change in magnitude of driver differential output voltage for complementary output states ∆VODST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; RL= 54 Ω or 100 Ω (Figure 2); note (1)max 0.2 V7
Driver common mode output voltage VOCST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; RL= 54 Ω or 100 Ω (Figure 2)max 3 V7
Change in magnitude of driver common mode output voltage ∆VOCST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; RL= 54 Ω or 100 Ω (Figure 2); note (1)max 0.2 V7
Receiver differential threshold voltage VTHST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; VCM = -7 V to 12 V, DE = 0min -0.2 · max 0.2 V7
Receiver input hysteresis ∆VTHST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; VCM = 0 Vtyp 70 mV7
Receiver output high voltage VOHST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; IOUT = -4 mA, VID = 200 mV (Figure 4)min 2 V7
Receiver output low voltage VOLST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; IOUT = 4 mA, VID = -200 mV (Figure 4)max 0.4 V7
Receiver input resistance RRINST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; VCM = -7 V to 12 Vmin 24 kΩ7
Receiver short-circuit current IOSRST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; VRO = 0 V to VCCmin 7 · max 60 mA7
Maximum data rate DRST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °Cmin 12 · typ 15 Mbps8
Differential output delay tDDST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; RL= 60 Ω, CL = 15 pF (Figure 5 and Figure 6)typ 18 · max 30 ns8
Differential output transition time tTDST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; RL= 60 Ω, CL = 15 pF (Figure 5 and Figure 6)typ 12 · max 20 ns8
Propagation delay tPLH tPHLST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; RL= 27 Ω, CL = 15 pF (Figure 9 and Figure 10)typ 18 · max 30 ns8
|tPLH - tPHL| driver propagation delay skew tPDSST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; RL= 27 Ω, CL = 15 pF (Figure 9 and Figure 10); note (1)typ 2 · max 5 ns8
Output enable time tPZLST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; RL= 110 Ω (Figure 11 and Figure 12)typ 19 · max 35 ns8
Output enable time tPZHST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; RL= 110 Ω (Figure 7 and Figure 8)typ 30 · max 50 ns8
Output disable time tPHZST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; RL= 110 Ω (Figure 7 and Figure 8)typ 19 · max 35 ns8
Output disable time tPLZST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; RL= 110 Ω (Figure 11 and Figure 12)typ 30 · max 50 ns8
Differential output delay skew tSKEWST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °Ctyp 1 · max 3 ns8
Driver enable from shutdown to output high tPSHST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; RL = 110 Ω (Figure 7 and Figure 8)typ 30 · max 50 ns8
Driver enable from shutdown to output low tPSLST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; RL = 110 Ω (Figure 11 and Figure 12)typ 19 · max 35 ns8
Propagation delay tRPLH, tRPHLST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; VID = 0 V to 3 V, CL = 15 pF (Figure 13 and Figure 14)typ 30 · max 50 ns9
|tRPLH - tRPHL| receiver propagation delay skew tRPDSST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; VID = 0 V to 3 V, CL = 15 pF (Figure 13 and Figure 14)typ 1 · max 3 ns9
Receiver output enable time to low level tPRZLST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; CL = 15 pF (Figure 15 and Figure 17)typ 10 · max 20 ns9
Receiver output enable time to high level tPRZHST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; CL = 15 pF (Figure 15 and Figure 16)typ 10 · max 20 ns9
Receiver output disable time from high level tPRHZST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; CL = 15 pF (Figure 15 and Figure 18)typ 10 · max 20 ns9
Receiver output disable time from low level tPRLZST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; CL = 15 pF (Figure 15 and Figure 19)typ 10 · max 20 ns9
Receiver output enable time from shutdown to high level tPRSHST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; CL = 15 pF (Figure 15 and Figure 16)typ 10 · max 20 ns9
Receiver output enable time from shutdown to low level tPRSLST3485EBDR; VCC = 3 V to 3.6 V; TA = -40 to 85 °C; typical at 25 °C; CL = 15 pF (Figure 15 and Figure 17)typ 20 · max 40 us9

Pins, by the datasheet

8
1 RO
Receiver output; high when A exceeds B by 200 mV, low when A is below B by 200 mV. · p. 3
2 RE
Active-low receiver output enable; high makes RO high impedance and enters shutdown when DE is low. · p. 3
3 DE
Driver output enable; high enables driver outputs, low makes them high impedance and enters shutdown when RE is high. · p. 3
4 DI
Driver input; low forces A low and B high, high forces A high and B low. · p. 3
5 GND
Ground. · p. 3
6 A
Non-inverting receiver input and non-inverting driver output. · p. 3
7 B
Inverting receiver input and inverting driver output. · p. 3
8 VCC
Supply voltage: 3 V to 3.6 V. · p. 3

Ordering codes, by the datasheet

4
ST3485ECDR
SO8 · 0 to 70 °C; tape and reel; marking 3485EC · p. 21
ST3485EBDR
SO8 · -40 to 85 °C; tape and reel; marking 3485EB · p. 21
ST3485EIDT
SO8 · -40 to 125 °C; tape and reel; marking 3485EI · p. 21
ST3485EIYDT
SO8 · -40 to 125 °C, automotive grade; tape and reel; marking 3485EIY · p. 21

Parameters

16
Communication Mode
Half-Duplex
Current - Supply
1.3mA
Current - Supply(Max)
2.2mA
Data Rate
12Mbps
ESD Protect
±15kV
Features
Tx/Rx enable
Number of Drivers
1
Number of Nodes
64
Number of Receivers
1
Operating Temperature
-40℃~+85℃
Quiescent Supply Current
2.2mA
Rise Time
12ns
Standby Current
2nA
Type
Transceiver
Voltage - Supply
3V~3.6V
Voltage - Supply(Absolute Max)
7V

Order codes

1

Pinout

8
The pins of the ST3485EBDR
PinNameType
1ROUnspecified
2RE#Unspecified
3DEUnspecified
4DIUnspecified
5GNDUnspecified
6AUnspecified
7BUnspecified
8VCCUnspecified

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Questions

Is there a KiCad symbol and footprint for the ST3485EBDR?

Yes. The symbol is EasyEDA_Cloud:SN75176ADR-MS and the footprint Package_SO:SOIC-8_3.9x4.9mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the ST3485EBDR?

SO-8, with 8 pins. Its footprint is drawn on this page.

Where is the ST3485EBDR datasheet?

STMicroelectronics publishes it: the Datasheet link on this page opens it.

Where can I order the ST3485EBDR?

JLCPCB lists it as part C75809, with 14,407 in stock; the sellers' links on this page open their listings.

What can replace the ST3485EBDR?

Parts like it in the library: the SP3485EN-L/TR by MaxLinear, the SP485EEN-L/TR by MaxLinear, the SN75176BD by Texas Instruments and the MAX485ESA+T by Maxim Integrated (Analog Devices). Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the ST3485EBDR?

5 boards in 5 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8