The TC1272/TC1273/TC1274 are cost-effective system supervisor circuits designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required. The reset output is driven active within 20 µsec of VCC falling through the reset voltage threshold. RESET is maintained active for a minimum of 100 msec after VCC rises above the reset threshold. The TC1274 has an active-high RESET output, while the TC1272 and TC1273 have an active-low RESET output. The TC1272 and TC1274 each have a complimentary out- put, while the TC1273 has an open-drain output. The output of the TC1272 and TC1273 is valid down to VCC = 1.2V. The TC1274 is valid down to VCC = 1.8V. All three devices are available in a 3-Pin SOT-23B package. The TC1272/TC1273/TC1274 devices are optimized to reject fast transient glitches on the VCC line.
The TC1272/TC1273/TC1274 are cost-effective system supervisor circuits designed to monitor Vcc in digital systems. These devices provide a reset signal to the host processor when necessary and require no external components, available in a 3-Pin SOT-23B package.
The circuit is optimized to reject fast transient glitches on the power supply line. The TC1274 features an active-high RESET output valid down to 1.8V, while the TC1272 and TC1273 have active-low outputs valid down to 1.2V.
| Supply Voltage (TC1272, TC1273) | 1.2V to 5.5V |
|---|---|
| Supply Voltage (TC1274) | 1.8V to 5.5V |
| Operating Temperature Range | -40°C to +85°C |
| Minimum Reset Duration | 100 msec |
No external components are required for operation.
The devices are available in a 3-Pin SOT-23B package.
The TC1274 output is valid down to Vcc = 1.8V.