The MAX77650AEWV+T: Surface-mount only; no through-hole variant exists. Tape & Reel (TR) and Cut Tape (CT) options are listed, so the part supports both volume pick-and-place and prototype hand-assembly runs from the same reel.
Charging and power rail
Single-cell Lithium Ion/Polymer charger with a programmable constant-current charge up to 300 mA max — the current is set via an external resistor or I²C register, not a fixed internal limit. Battery pack voltage max is 4.6 V, which covers the standard 4.2 V and 4.35 V cell chemistries with headroom. Supply voltage max is 5.5 V — a typical USB VBUS (5.0 V nominal) sits comfortably within this, but a 5 V rail with ±10 % tolerance (5.5 V) is at the absolute limit; margin drops to zero. The input should be regulated to 5.0 V or lower for reliable operation.
Control interface and protection
The charger is controlled via GPIO and I²C — the I²C bus handles charge current and voltage programming (Programmable Features: Current, Voltage), while the GPIO lines can be used for status indication or enable control. No dedicated SMBus or SPI interface is listed. Fault protection covers over-temperature only — no reverse-battery, short-circuit, or under-voltage lockout protection is stated in the spec summary. For a design that sees hot-plug or reverse-insertion risk, external protection (a series diode or P-FET) should be added ahead of the charger.
Operating temperature range is -40°C to 85°C (TA) — this is the industrial temperature grade, covering outdoor telecom enclosures, automotive cabin (non-engine bay), and factory-floor equipment. No military or extended-range (-55°C to 125°C) qualification is claimed.