TPS3838K33-Q1中文资料德州仪器数据手册PDF规格书

Qualified for Automotive Applications

Customer-Specific Configuration Control

Can Be Supported Along With

Major-Change Approval

ESD Protection Exceeds 2000 V Per

MIL-STD-883, Method 3015; Exceeds 200 V

Using Machine Model (C = 200 pF, R = 0)

Supply Current of 220 nA (Typ)

Precision Supply Voltage Supervision

Range: 1.8 V, 2.5 V, 3.0 V, 3.3 V

Power-On Reset Generator With Selectable

Delay Time of 10 ms or 200 ms

Push/Pull RESET Output (TPS3836),

RESET Output (TPS3837), or

Open-Drain RESET Output (TPS3838)

Manual Reset

5-Pin SOT-23 Package

Temperature Range: −40°C to 125°C

Applications Include

− Applications Using Automotive

Low-Power DSPs, Microcontrollers, or

Microprocessors

− Battery-Powered Equipment

− Intelligent Instruments

− Wireless Communication Systems

− Automotive Systems

description

The TPS3836, TPS3837, TPS3838 families of

supervisory circuits provide circuit initialization

and timing supervision, primarily for DSP and

processor-based systems.

During power on, RESET is asserted when the supply voltage VDD becomes higher than 1.1 V. Thereafter, the

supervisory circuit monitors VDD and keeps RESET output active as long as VDD remains below the threshold

voltage VIT. An internal timer delays the return of the output to the inactive state (high) to ensure proper system

reset. The delay time starts after VDD has risen above the threshold voltage VIT.

When CT is connected to GND a fixed delay time of typical 10 ms is asserted. When connected to VDD the delay

time is typically 200 ms.

When the supply voltage drops below the threshold voltage VIT, the output becomes active (low) again.

All the devices of this family have a fixed-sense threshold voltage VIT set by an internal voltage divider.

The TPS3836 has an active-low push-pull RESET output. The TPS3837 has active-high push-pull RESET, and

TPS3838 integrates an active-low open-drain RESET output.