MAX907/MAX908/MAX909 are high-speed, ultra-low-power, single-supply TTL comparators designed for use in systems powered from a single +5V supply; the MAX909 also accepts dual ±5V sup- plies. Their 40ns propagation delay (with 5mV input overdrive) is achieved with a power consumption of only 3.5mW per comparator. The wide input common- mode range extends from 200mV below ground (below the negative supply rail for the MAX909) to within 1.5V of the positive supply rail. Because they are micropower, high-speed compara- tors that operate from a single +5V supply, they are ideal for use in systems requiring high performance, low power and single-supply operation, such as micro- processors, digital signal processors, memories, data converters and power management circuits.
The MAX907, MAX908 and MAX909 are high‑speed, ultra‑low‑power voltage comparators designed for single‑supply (+5 V) operation, with the MAX909 also supporting dual ±5 V supplies. They feature TTL‑compatible outputs, internal hysteresis, and short‑circuit protection on all inputs and outputs.
The devices are offered in 8‑pin DIP/SO (MAX907, MAX909) and 14‑pin DIP/SO (MAX908) packages, and are intended for battery‑powered systems, high‑speed A/D converters, line receivers, threshold detectors, and other fast‑switching applications.
| Propagation Delay | 40 ns (typical) |
|---|---|
| Supply Current per Comparator | 700 µA (3.5 mW) |
| Supply Voltage Range | 4.5 V to 5.5 V (single‑supply); MAX909 also ±5 V |
| Input Common‑Mode Range | 200 mV below ground to 1.5 V below V+ (MAX909 extends to –5 V) |
| Output Type | TTL‑compatible (MAX909 complementary) |
| Internal Hysteresis | Yes, provides clean switching |
| Latch (MAX909 only) | Internal latch with transparent/hold modes |
Yes, the MAX909 can operate with a dual ±5 V supply in addition to single‑supply operation.
The typical propagation delay is 40 ns (typical) with a 5 mV input overdrive.
Yes, all three devices have built‑in hysteresis to ensure clean output switching.
Each comparator draws about 700 µA (3.5 mW) from the supply.