TPS3895 Datasheet, PDF (1/21 Pages) Texas Instruments – Single-Channel, Adjustable Supervisory Circuit in Ultra-Small Package

TPS3895, TPS3896
TPS3897, TPS3898
www.ti.com
SBVS172A – JULY 2011 – REVISED SEPTEMBER 2011
Single-Channel, Adjustable Supervisory Circuit in Ultra-Small Package
Check for Samples: TPS3895, TPS3896, TPS3897, TPS3898
FEATURES
1
•2 Very Small µSON (1.45 mm × 1 mm) Package
• Adjustable Threshold down to 500 mV
• Threshold Accuracy: 1.0% Over Temperature
• Capacitor-Adjustable Delay Time
• Low Quiescent Current: 6 µA (typ)
• External Enable Input
• Open-Drain (rated at 18V)/Push-Pull Output
Options
• Temperature Range: –40°C to +125°C
• Pin-for-Pin Compatible with MAX6895/6/7/8
APPLICATIONS
• DSPs, Microcontrollers, and Microprocessors
• Notebook and Desktop Computers
• PDAs and Handheld Products
• Portable and Battery-Powered Products
• FPGA and ASIC
TPS3895/TPS3897
DRY PACKAGE
(TOP VIEW)
ENABLE 1
GND 2
SENSE 3
6 VCC
5 CT
4 SENSE_OUT
TPS3896/TPS3898
DRY PACKAGE
(TOP VIEW)
ENABLE 1
GND 2
SENSE 3
6 VCC
5 CT
4 SENSE_OUT
DESCRIPTION
The TPS3895, TPS3896, TPS3897, and TPS3898
devices (TPS389x) are a family of very small
supervisory circuits that monitors voltage greater than
500 mV with a 0.25% (typical) threshold accuracy
and offer a adjustable delay time using external
capacitors. 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) rises above the threshold,
and the enable pin (ENABLE) is high, then the output
pin (SENSE_OUT) goes high after the
capacitor-adjustable delay time. When SENSE falls
below the threshold or ENABLE is low, then
SENSE_OUT goes low. For truth tables, see Table 2
and Table 3.
For TPS389xA versions, both SENSE and ENABLE
have a capacitor-adjustable delay. The output asserts
after this capacitor-adjustable delay when both
SENSE and ENABLE inputs are good. The
TPS389xP devices have a small, 0.2-µs propagation
delay from when the enable pin asserts to when the
output pin asserts, provided SENSE is above the
threshold.
All devices operate from 1.7 V to 6.5 V and have a
typical 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 T_J = –40°C to +125°C.
Table 1. FAMILY COMPARISON
DEVICE
TPS3895A
TPS3895P
ENABLE
Active
high
Active
high
TPS3896A Active low
TPS3896P Active low
TPS3897A
TPS3897P
Active
high
Active
high
TPS3898A Active low
TPS3898P Active low
OUTPUT
Active high,
push-pull
Active high,
push-pull
Active low,
push-pull
Active low,
push-pull
Active high,
open-drain
Active high,
open-drain
Active low,
open-drain
Active low,
open-drain
INPUT
(SENSE)
DELAY
Capacitor
adjustable
Capacitor
adjustable
Capacitor
adjustable
Capacitor
adjustable
Capacitor
adjustable
Capacitor
adjustable
Capacitor
adjustable
Capacitor
adjustable
ENABLE
DELAY
Capacitor
adjustable
0.2 µs
Capacitor
adjustable
0.2 µs
Capacitor
adjustable
0.2 µs
Capacitor
adjustable
0.2 µs
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated