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Analog Devices MAX4821EUP+T — Analog & Data Acquisition

MAX4821EUP+T Relay & Solenoid Driver, 8-Ch Low-Side, 70 mA

MPNMAX4821EUP+T
End of Life

Analog Devices MAX4821EUP+T, 8-channel low-side relay/solenoid driver, 70 mA per channel, 2 Ω Rds(on), parallel/serial interface, 2.3 V to 5.5 V load supply, -40°C to 85°C, 20-TSSOP-EP.

$4.95Ref. price · indicative, final on quote
Packaging20-TSSOP (0.173", 4.40mm Width) Exposed Pad
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

MAX4821EUP+T specifications
ParameterValue
Output typeN-Channel
TypeRelay, Solenoid Driver
MountingSurface Mount
Voltage - load2.3V ~ 5.5V
Output current70mA
I/O channels8
InterfaceParallel, Serial
Operating temperature-40°C ~ 85°C (TA)
PackageTape & Reel (TR); Cut Tape (CT)
Rds on2Ohm
Case20-TSSOP (0.173\", 4.40mm Width) Exposed Pad
Output configurationLow Side
Ratio - Input:Output1:8

Product details

The MAX4821EUP+T is an 8-channel low-side N-channel driver from Analog Devices, built to switch relays, solenoids, and small inductive loads. Each output sinks up to 70 mA, with a typical on-resistance of 2 Ω. The load supply runs from 2.3 V to 5.5 V. The part accepts both parallel and serial interface control, which means you can drive it from a GPIO port or daisy-chain it on a shift-register bus. That dual-interface flexibility simplifies BOM consolidation — one driver IC covers both legacy and SPI-driven controller architectures.

It is not AEC-Q100 qualified, so keep it out of under-hood or chassis-domain automotive designs. The 20-TSSOP with exposed pad (20-TSSOP-EP) helps pull heat into the PCB copper pour — important if you are running all eight channels near the 70 mA limit in a still-air enclosure.

There is no last-time-buy or NRND flag, so it is safe to qualify into new production.

Frequently asked questions

What is the output current per channel?

Each of the eight low-side outputs can sink up to 70 mA maximum. Typical on-resistance is 2 Ω, so voltage drop at full load is about 140 mV.

What package does the MAX4821EUP+T use?

It comes in a 20-lead TSSOP with exposed pad (20-TSSOP-EP), surface-mount. The exposed pad aids thermal dissipation into the PCB ground plane.

What interface does the MAX4821EUP+T support?

It supports both parallel and serial interface control. You can drive it directly from GPIO lines or daisy-chain it on a serial bus.