interface

MAX485

Full part number: MAX485ESA

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This datasheet covers the MAX485ESA, a low-power RS-485 and RS-422 transceiver from UTD Semiconductor. It details electrical characteristics for half-duplex communication applications supporting up to 32 devices per bus. Key parameters include supply voltage of 5V, data rate up to 2.5 Mbps, quiescent current between 120µA and 500µA, common-mode input range of -7V to +12.5V, propagation delay of 30ns, and thermal shutdown protection.

02 — Key specifications

Datasheet parameters

ParameterMinTypMaxConditions
quiescent current — 500 µA 900 µA MAX481/MAX485; DE = VCC
output voltage — — 200 mV R = 27Ω or 50Ω, Figure 4
output current 35 mA — 250 mA -7V≤ VO≤ 12V (Note 4)
supply voltage range 4.5 V — 5.5 V
operating temperature -40 °C — 105 °C
propagation delay 10 ns 30 ns 60 ns RDIFF = 54Ω
data rate 2.5 Mbps — —
output voltage high 3.5 V — — IO = -4mA, VID = 200mV
output voltage low — — 400 mV IO = 4mA, VID = -200mV
channel count — 1 —
driver count — 1 —
receiver count — 1 —
03 — Alternatives

Closest matches to MAX485

MAX3232 10.0× lower data rate, 10.0× higher propagation delay, 4.1× lower output current
SN65HVD3082E 2.7× lower output voltage low, 1.4× lower operating temperature, 1.3× higher output voltage high
PCA9509 7.1× lower output current, 6.2× lower data rate, 3.6× higher propagation delay
SP3222ECA-L 10.6× lower data rate, 4.1× lower output current, 1.7× lower quiescent current
SP481E 10.0× higher output voltage, 4.0× higher data rate, 2.8× lower output current
CH340C 14.0× higher quiescent current, 1.5× lower supply voltage range, 1.4× lower operating temperature
04 — FAQ

Frequently asked questions

What is the channel count of the MAX485ESA?

The channel count is 1.

What is the data rate of the MAX485ESA?

The data rate is 2.5 Mbps.

What is the driver count for the MAX485ESA?

The driver count is 1.

What is the maximum operating temperature for the MAX485ESA?

The maximum operating temperature is 105 °C.

What is the output current when -7V≤ VO≤ 12V (Note 4)?

The output current is 250 mA.

What is the output voltage when R = 27Ω or 50Ω, Figure 4?

The output voltage is 200 mV.

What is the output voltage high when IO = -4mA and VID = 200mV?

The output voltage high is 3.5 V.

What is the output voltage low specification for the MAX485ESA?

The output voltage low is 400 mV when IO = 4mA and VID = -200mV.

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