Datasheet

2
3
1
RESET
V
DD
GND
TLV809
DBV/DBZPackages
3.3V
TLV809K33
DSP/FPGA/ASIC
GND
GND
RESET RESET
V
DD
3.3-VLDO
GND
OUT
IN
5V
V
DD
TLV809J25, TLV809L30
TLV809K33, TLV809I50
www.ti.com SLVSA03C –JUNE 2010–REVISED FEBRUARY 2012
3-Pin Supply Voltage Supervisors
Check for Samples: TLV809J25, TLV809L30, TLV809K33, TLV809I50
1
FEATURES
APPLICATIONS
2
• 3-Pin SOT23 Package
• DSPs, Microcontrollers, and Microprocessors
• Supply Current: 9 µA (Typical) • Wireless Communication Systems
• Precision Supply Voltage Monitor: • Portable/Battery-Powered Equipment
2.5 V, 3 V, 3.3 V, 5 V
• Programmable Controls
• Power-On Reset Generator with
• Intelligent Instruments
Fixed Delay Time of 200 ms
• Industrial Equipment
• Pin-for-Pin Compatible with MAX809
• Notebook and Desktop Computers
• Temperature Range: –40°C to +85°C
• Automotive Systems
DESCRIPTION
The TLV809 family of supervisory circuits provides circuit initialization and timing supervision, primarily for DSPs
and processor-based systems.
During power-on, RESET is asserted when the supply voltage (V
DD
) becomes higher than 1.1 V. Thereafter, the
supervisory circuit monitors V
DD
and keeps RESET active as long as V
DD
remains below the threshold voltage
V
IT
. An internal timer delays the return of the output to the inactive state (high) to ensure proper system reset.
The delay time (t
d(typ)
= 200 ms) starts after V
DD
has risen above the threshold voltage, V
IT
. When the supply
voltage drops below the V
IT
threshold voltage, the output becomes active (low) again. No external components
are required. All the devices in this family have a fixed sense-threshold voltage (V
IT
) set by an internal voltage
divider.
The product spectrum is designed for supply voltages of 2.5 V, 3 V, 3.3 V, and 5 V. The circuits are available in a
3-pin SOT-23 package. The TLV809 devices are characterized for operation over a temperature range of –40°C
to +85°C.
Figure 1. TYPICAL APPLICATION
1
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PRODUCTION DATA information is current as of publication date.
Copyright © 2010–2012, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.