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EF_BOD

Efabless

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Brown Out Detector (BOD)

Description

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.

Pinout

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

Specifications

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

Summary

Catalog ID

EF_BOD

Provider

Vendor

Vendor

Efabless

Node

130nm

Foundry

Skywater

Category

Power Module

Licensing

Info

Open Source (Free)

Quality

Certification

EF Certified

Maturity

Integrated