The MAX9691ESA+ is a single high-speed comparator with an internal latch, delivering complementary ECL outputs. Its 1.8 ns max propagation delay makes it suitable for timing-critical signal chains like line receivers, threshold detectors, and high-speed data recovery where decision time matters.
The 50 mA typical output current is enough to drive a terminated 50-ohm line or feed the input of a downstream ECL gate without an extra buffer. Quiescent current maxes at 26 mA — modest for a 1.8 ns part, but worth budgeting in a multi-channel board. These set the DC accuracy floor for logic-level decisions. Common-mode rejection is 80 dB typical, power-supply rejection 60 dB typical. That CMRR helps when the input signal rides on a noisy ground; the PSRR means the comparator won't chatter on a lightly regulated rail.
Package, mounting, and rework considerations
Housed in an 8-SOIC (0.154-inch body width, 3.90 mm width), surface-mount. The SOIC-8 footprint is standard — no exotic pad geometry.