TA7900S

The TA7900S is an IC specially designed for micro-computer systems. It produces an output voltage of 5±0.25V without need for adjustment from its accurate reference voltage and amplifier circuit. At power-on, it outputs a reset signal to reset the system. It will also output a reset signal when the 5V output voltage drops below 92% because of external disturbance or other problem. It also incorporates a watchdog timer for self-diagnosing the system. When the system malfunctions, the IC generates reset pulses intermittently to prevent the system from running away.

The features of TA7900S can be summarized as (1)accurate output :5±0.25V; (2)output voltage adjusting pin attached; (3)power-on reset timer incorporated; (4)watchdog timer incorporated; (5)operating temperature range : from -40 to 85°C; (6)wide operating voltage range : 40V(max.); (7)small SIP-9 pin (TA7900S); (8)SOP-14 pin (TA7900F).

The absolute maximum ratings of TA7900S are (1)input voltage VIN1: 40V; (2)input voltage VIN2: -0.3 to +16V; (3)output current IOUT1: 10mA; (4)output current IOUT2: 4mA; (5)output voltage VOUT1: 40mA; (6)output voltage VOUT2: 16mA; (7)power dissipation PD:500/280 mW; (8)operating temperature Topr: -40 to 85°C; (9)storage temperature Tstg :- 55 to 150°C; (10)lead temperature-time Tsol: 260 (10s)°C.