This IP is an under-voltage detector with glitch rejection and separate brown-out and under-voltage outputs with independently selectable trip points. It was taped out on the CI2404 Chipalooza tapeout. The specifications below are target specifications. Check back for characterized numbers once the silicon is characterized.
| Pin name | Use | Domain | Notes |
|---|---|---|---|
| avdd | analog power | 3.3-5.5V | |
| dvdd | digital power | 1.8V | |
| avss | analog ground | ||
| dvss | digital ground | ||
| ena | enable | dvdd domain | |
| vbg | bandgap reference voltage | ||
| out | brown-out alarm | dvdd domain | CMOS digital |
| vunder | under-voltage output | dvdd domain | CMOS digital |
| vtrip[2:0] | under-voltage trip point select | dvdd domain | CMOS digital |
| otrip[2:0] | brown-own trip point select | dvdd domain | CMOS digital |
| Parameter | Min | Typical | Max | Unit | Notes |
|---|---|---|---|---|---|
| Operating Temperature | -40 | 25 | 85 | °C | |
| Brown-Out Threshold Voltage | 2.4 | 2.7 | 3 | V | V_th where brown-out reset is triggered |
| Hysteresis Voltage | 0.1 | 0.2 | 0.3 | V | Difference between assert and deassert levels |
| Reset Active Time | 50 | 100 | 200 | ms | Minimum duration of reset signal |
| Reset Output Voltage (Low) | 0 | 0.1 | 0.3 | V | When in reset state |
| Reset Output Voltage (High) | 2.7 | 3.3 | 5.5 | V | When not in reset state |
| Power Consumption | 1 | 5 | 10 | µA | Measured at 3.3V and 25°C |
| Output Leakage Current | 0 | 1 | 10 | nA | When reset is not active |
| Output Capacitive Load | 1 | 10 | 20 | pF | |
| Response Time | 10 | 20 | 50 | µs | Time from voltage drop to reset activation |
EF_BOD
Vendor
Efabless
130nm
Skywater
Power Module
Open Source (Free)
EF Certified
Integrated