TPS3896

具有低电平有效、推挽输出的超小型、单通道、可调节监控电路

The TPS3895, , TPS3897, and TPS3898 devices TPS389x are a family of very small supervisory circuits that monitor voltage greater than 500 mV with a 0.25% typical threshold accuracy and has capacitor-adjustable, delay-time flexibility. The TPS389x family also has a logic enable pin ENABLE or ENABLE to power on/off the output. With the TPS3895, for example, when the input voltage pin SENSE falls below the threshold, or if the enable pin ENABLE is low, then the output pin SENSE_OUT goes low. When SENSE rises above the threshold and ENABLE is high, then SENSE_OUT goes high after the capacitor-adjustable delay time elapses A version only; for differences between the A and P versions, see Table 1. For truth tables, see Table 2 and Table 3.

For TPS389xA versions, there is a capacitor-adjustable delay from when the enable pin asserts to when the output pin asserts; this period is the same as the delay from SENSE to the output pin. The TPS389xP devices have a fixed propagation delay from when the enable pin asserts to when the output pin asserts.

All devices operate from 1.8 V to 6.5 V and have a low quiescent current of 6 µA with an open-drain output rated at 18 V. The TPS389x is available in an ultra-small µSON package and is fully specified over the temperature range of TA = –40°C to +125°C.

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Very Small µSON 1.5 mm × 1 mm Package

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Adjustable Threshold down to 500 mV

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Threshold Accuracy: 1.0% Over Temperature

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Capacitor-Adjustable Delay Time

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Low Quiescent Current: 6 µA typ

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External Enable Input

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Open-Drain/Push-Pull Output Options

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Temperature Range: –40°C to +125°C

* APPLICAONS

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DSPs, Microcontrollers, and Microprocessors

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Notebook and Desktop Computers

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PDAs and Handheld Products

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Portable and Battery-Powered Products

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FPGA and ASIC

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