RT9829GQW

The RT9829 has two combined delayed reset inputs (SR0, SR1) with a user selectable delayed setup time (tSRC) option of either 7.5s or 12.5s (typ.), selectable via the dual-state DSR input pin. When DSR is connected to ground, tSRC = 7.5s (typ.); when connected to VCC, tSRC = 12.5s (typ.). There are two reset outputs which become active simultaneously after both of the reset inputs are held active for the selected tSRC delay time. The outputs remain asserted until either or both inputs go to inactive logic level (for this device the output reset pulse duration is fully push-button controlled, meaning neither fixed nor minimum reset pulse width, nor power on reset pulse is implemented). The first reset output, RST1, is active low, open drain; the second reset output, RST2, is active high, push-pull. The device fully operates over a broad VCC range from 1.65V to 5.5V. Below 1.575V (typ.), the inputs are ignored and the outputs are de-asserted. The de-asserted reset output levels are then valid down to 1V. The RT9829 is available in a tiny WDFN-8L 2x2 (COL) package.

Applications

• Mobile phones, Smartphones
• e-Books
• MP3 Players
• Games
• Portable Navigation Devices

Key features

• Dual Reset Push-Button Inputs
• User Selectable Delay Setup Time: 7.5s and 12.5s (typ.)
• Push-Button Controlled Reset Pulse Duration
• No Fixed nor Minimum Pulse Width Guaranteed
• No Power On Reset
• Dual Reset Outputs
• RST1: Active Low, Open-Drain
• RST2: Active High, Push-Pull
• Fixed Reset Input Logic Voltage Levels
• Broad Operating Voltage Range: 1.65V to 5.5V
• Inactive Reset Output Levels Valid Down to 1V
• 2μA Low Supply Current
• Operating Temperature: -40°C to 85°C
• Small Thermally Enhanced 8-Lead WDFN Package
• RoHS Compliant and Halogen Free