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LTC2915IDDB-1-TRPBF Datasheet(PDF) 6 Page - Linear Technology |
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LTC2915IDDB-1-TRPBF Datasheet(HTML) 6 Page - Linear Technology |
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6 / 12 page  LTC2915/LTC2916 6 29156fa PIN FUNCTIONS GND (Pin 4/Pin 1): Device Ground. MR (Pin 3/Pin 2) (LTC2916 only): Manual Reset Input (Active Low). A low level on the MR input causes the part to issue a reset, which is released one reset timeout after the input goes high. The pin has an internal 100k pull-up to VCC, and thus may interface directly to a momentary pushbutton. Leave open if unused. RST (Pin 5/Pin 8): Open Drain RST Output. Asserts low when VM is below the threshold selected by SEL1, SEL2 and TOL input pins. Held low for an adjustable timeout after VM input is above threshold. RT (Pin 6/Pin 7): Reset Timeout Control Pin. Attach an external Capacitor (CRT) to GND to set a reset timeout of 9ms/nF. Floating RT generates a reset timeout of approxi- mately 400μs. Tie RT to VCC to generate a reset timeout of approximately 200ms. SEL1, SEL2 (Pins 2, 7/Pins 3, 6): Monitor Voltage Select Three-State Inputs. SEL1 and SEL2 control the nominal threshold voltage that VM is set to monitor. Connect to VCC, GND or leave unconnected in open state. (See Table 1). TOL (Pin 3/Pin 2) (LTC2915 only): Three-State Input for Supply Tolerance Selection (–5%, –10% or –15%). Controls the tolerance band at which the VM supply is monitored. Connect to VCC, GND, or leave unconnected in open state. (See Table 2). VCC (Pin 8/Pin 5): Power Supply Input. Bypass this pin to ground with a 0.1μF ceramic capacitor. A minimum of 1.5V on VCC ensures that the part is out of under voltage lockout and that the voltage thresholds are accurate. Operates as a direct supply input for voltages up to 5.5V. Operates as a shunt regulator for supply voltages greater than 5.7V and should have a resistor between this pin and the supply to limit VCC input current to no greater than 5mA. When used without a current-limiting resistor, pin voltage must not exceed 5.7V. VM (Pin 1/Pin 4): Voltage Monitor Input to RST Compara- tor. SEL1, SEL2 and TOL inputs select the exact threshold that asserts the RST output. Exposed Pad (Pin 9, DFN Only): Exposed Pad may be left open or connected to device ground. (TSOT/DFN) BLOCK DIAGRAM GND RST VCC VCC 29156 BD RT INTERNAL 200ms TIMER ADJUSTABLE RESET TIMER RESET DRIVER LOGIC VCC DETECT 6.2V VCC VM SEL1 MR SEL2 3 STATE DECODE MONITOR DIVIDER MATRIX REFERENCE DIVIDER MATRIX TOL 100k 0.5V + – LTC2916 LTC2915 |
Similar Part No. - LTC2915IDDB-1-TRPBF |
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Similar Description - LTC2915IDDB-1-TRPBF |
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