DocID2159 Rev 4

7/19

LM139, LM239, LM339

Electrical characteristics

19

trel

Large signal response time

RL= 5.1 kΩ connected to VCC+, el = TTL,

V(ref) = +1.4 V

300

300

ns

1. At output switch point, Vo ≈ 1.4 V, VCC+ from 5 V to 30 V, and over the full common-mode range (0 V to VCC+ -1.5 V).

2. The direction of the input current is out of the IC due to the PNP input stage. This current is essentially constant,

independent of the state of the output, so no loading charge exists on the reference of input lines.

3. The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3 V.

The upper end of the common-mode voltage range is VCC+ -1.5 V, but either or both inputs can go to +30 V without

damage.

4. Positive excursions of input voltage may exceed the power supply level. As long as the other voltage remains within the

common-mode range, the comparator will provide a proper output state. The low input voltage state must not be less than

-0.3 V (or 0.3 V below the negative power supply, if used).

5. The response time specified is for a 100 mV input step with 5 mV overdrive. For larger overdrive signals, 300 ns can be

obtained.

Table 3. Electrical characteristics at VCC+ = +5 V, VCC- = GND, Tamb = +25 °C

(unless otherwise specified) (continued)

Symbol

Parameter

LM139A - LM239A

LM339A

LM139 - LM239

LM339

Unit

Min.

Typ.

Max.

Min

Typ.

Max.