SN65LBC184 — Datasheet Summary, Specs & Alternatives

01 — Overview

This Texas Instruments datasheet covers the SN65LBC184 and SN75LBC184 differential transceivers, part of the SNx5LBC184 family. Designed for RS-485 industrial networks, these devices offer integrated transient voltage suppression and ESD protection exceeding 30kV. Key parameters include a supply range of 4.75 to 5.25 V, maximum disabled current of 300μA, and support for speeds up to 250kbps. The open-circuit fail-safe receiver design allows connecting up to 128 devices on a single bus without isolation transformers, ensuring reliable communication in noisy environments.

02 — Key specifications

Datasheet parameters

Parameter	Min	Typ	Max	Conditions
quiescent current	—	12 mA	25 mA	DE = \overline{RE} = 5V No Load
output voltage	—	800 mV	—	See Figure 6-4 and Figure 6-5
output current	-250 mA	-120 mA	—	VO = -7V
supply voltage range	4.75 V	5 V	5.25 V
operating temperature	0 °C	—	70 °C	SN75LBC184
propagation delay	—	500 ns	1.3 µs	RL = 54ΩCL = 50pFSee Figure 6-4
data rate	—	250 kbps	—
rise time	—	20 ns	—	SeeFigure 6-6
fall time	—	20 ns	—	SeeFigure 6-6
output voltage high	2.8 V	—	—
output voltage low	—	—	400 mV
channel count	—	1	—
driver count	—	1	—
receiver count	—	1	—

03 — Alternatives

Closest matches to SN65LBC184

ISO1050DUBR 6.8× lower propagation delay, 6.7× lower quiescent current, 4.4× higher output voltage

MCP2518FD 5.0× higher fall time, 5.0× higher rise time, 2.0× higher data rate

SN65HVD230 14.3× lower propagation delay, 6.3× higher fall time, 5.7× higher output voltage low

MCP2551 14.3× lower propagation delay, 6.7× lower supply voltage range, 6.2× higher quiescent current

MCP2515 5.0× lower propagation delay, 4.0× higher data rate, 4.0× lower fall time

TJA1042BT 20.0× higher data rate, 8.3× lower propagation delay, 4.4× higher output voltage

TJA1043 20.0× higher data rate, 20.0× lower output current, 8.3× lower propagation delay

TJA1051 20.0× higher data rate, 12.0× lower quiescent current, 7.7× lower propagation delay

04 — FAQ

Frequently asked questions

What is the channel count of the SN65LBC184?

The channel count is 1.

What is the data rate of the SN65LBC184?

The data rate is 250 kbps.

What is the driver count for the SN65LBC184?

The driver count is 1.

What is the fall time of the SN65LBC184?

The fall time is 20 ns, as shown in Figure 6-6.

What is the operating temperature for the SN75LBC184?

The operating temperature is 70 °C for the SN75LBC184.

What is the output current when VO = -7V?

The output current is -120 mA.

What is the output voltage?

The output voltage is 800 mV, as shown in Figure 6-4 and Figure 6-5.

What is the output voltage high?

The output voltage high is 2.8 V.