What this driver does and where it fits
The Maxim ICM7211AMIQH+D is a 4-digit LCD display driver that takes a BCD (binary-coded decimal) input and drives a 7-segment LCD panel directly — no external decoder, no segment resistors, no microcontroller overhead for the display refresh. It's the kind of part you reach for when you need a clean numeric readout on a battery-powered instrument, a panel meter, or a portable controller and you want to keep the firmware simple and the current draw low.
10 µA supply — the battery-life spec that matters
The ICM7211AMIQH+D draws just 10 µA of supply current. That's the entire driver running, refreshing the LCD, no sleep mode trickery. For a field instrument running on a 3V coin cell or a 3.6V lithium primary, that current is small enough to ignore in the system budget — the display can stay on continuously without dragging down the battery. Compare that to a general-purpose microcontroller blinking a segment through GPIOs, which burns orders of magnitude more current just to keep the oscillator alive.
Supply voltage range: 3V to 6V — one rail, no regulator needed
The part runs on any supply from 3V to 6V. That covers a 3.3V logic rail, a 5V industrial rail, or a 3V lithium cell. If you're retrofitting an old 5V panel meter into a 3.3V system, this driver works without a level shifter or a separate regulator. The BCD inputs are CMOS-compatible across that range, so it talks directly to a 3.3V or 5V microcontroller or a set of DIP switches.
44-PLCC with J-leads — field-service friendly
The 44-PLCC (J-Lead) package is a surface-mount part, but the J-leads are visible and accessible. You can hand-solder or rework it with a standard iron and a bit of flux — no hot-air station, no BGA underfill. The 44-PLCC footprint is common enough that you can find sockets for it if the design needs field replacement without soldering. That matters when the display driver is on a board that gets serviced in a panel shop or a repair depot, not a cleanroom.
Temperature range: -20°C to 85°C — indoor and mild outdoor
Rated for -20°C to 85°C, covering indoor industrial equipment, test gear, and commercial appliances.
Active production — no end-of-life worry
The ICM7211AMIQH+D is listed as Active in production. No last-time-buy notice, no NRND flag. You can specify it into a new BOM today and expect it to be available for the next several years.