Date: 17/05/2012
Reset IC for mobile devices for resetting hardware lock ups
Fairchild Semiconductor has expanded the line of reset timers to provide a better solution for mobile device lock ups and freezes.
Reset timers provide a delay between when a button/key is pressed and when the system resets, thereby preventing an unintended reset. This new family of reset timers is designed with a variety of delay times for resetting mobile devices and product options that provide both fixed and selectable delays, single- or dual-button reset, and fixed or variable reset pulse widths.
The FT7522 and FT10001 provide fixed delays of 7.5 and 10 seconds and offer inputs for single-button resetting capability. The FT3001 provides design flexibility with two inputs for single- or dual-button resetting capability as well as four different delay values that can be selected using the DSR0 and DSR1 pins. All devices function over a power supply range of 1.65V to 5.0V and draw minimal supply current when inactive, making them suitable for use in portable devices where battery conservation is essential.
Features:
FT10001
1. Fixed reset delay: 10 Seconds
2. One input reset pin
3. Open-drain output pin with fixed 530ms pulse
4. < 1ľA ICCQ consumption
5. Zero-Second test-mode enable
6. Integrated pull-up resistor on /SRO
FT7522
1. Fixed reset delay: 7.5 Seconds
2. One input reset pin
3. Open-drain output pin with fixed 400ms pulse
4. 1ľA ICCQ consumption
5. Zero-Second test-mode enable
FT3001
1. Selectable reset delays: 3.0, 3.75, 4.5, 6.0 Seconds
2. = 1ľA ICC current consumption in standby
3. Primary and secondary input reset pins
4. Push-pull and open-drain output pins
5. Available in the 8-lead MLP and10-lead UMLP packages
The price of FT7522, FT10001 and FT3001 is US $0.22, US $0.28 and US $0.29 respectively for 1,000 quantity pieces. The delivery is made at 8-12 weeks ARO.