MAX3107ETG/V+T Maxim Integrated, MAX3107ETG/V+T Datasheet

MAX3107ETG/V+T

Manufacturer Part Number

MAX3107ETG/V+T

Description

UART Interface IC SPI/IC UART with 128-Word FIFOs and Internal Oscillator

Manufacturer

Maxim Integrated

Datasheet

1.MAX1180ECMTD.pdf (18 pages)

Specifications of MAX3107ETG/V+T

Number Of Channels

Data Rate

24 Mbps

Supply Voltage - Max

3.6 V

Supply Voltage - Min

1.71 V

Supply Current

4 mA

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The MAX6715A–MAX6729A/MAX6797A are ultra-low-volt-

age microprocessor (µP) supervisory circuits designed to

monitor two or three system power-supply voltages. These

devices assert a system reset if any monitored supply falls

below its factory-trimmed or adjustable threshold and main-

tain reset for a minimum timeout period after all supplies rise

above their thresholds. The integrated dual/triple supervisory

circuits significantly improve system reliability and reduce

size compared to separate ICs or discrete components.

These devices monitor primary supply voltages (V

from 1.8V to 5.0V and secondary supply voltages (V

from 0.9V to 3.3V with factory-trimmed reset threshold

voltage options (see the Reset Voltage Threshold Suffix

Guide ). An externally adjustable RSTIN input option

allows customers to monitor a third supply voltage down

to 0.62V. These devices are guaranteed to be in the cor-

rect reset output logic state when either V

remains greater than 0.8V.

A variety of push-pull or open-drain reset outputs along

with watchdog input, manual-reset input, and power-fail

input/output features are available (see the Selector

Guide ). Select reset timeout periods from 1.1ms to

1120ms (min) (see the Reset Timeout Period Suffix

Guide ). The MAX6715A–MAX6729A/MAX6797A are avail-

able in small 5-, 6-, and 8-pin SOT23 packages and oper-

ate over the -40°C to +125°C temperature range.

19-0536; Rev 3; 9/08

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

UNREGULATED

Multivoltage Systems

Telecom/Networking

Equipment

Computers/Servers

Portable/Battery-

Operated Equipment

PUSHBUTTON

SWITCH

CONVERTER

Typical Operating Circuit

DC-DC

Dual/Triple, Ultra-Low-Voltage, SOT23 µP

________________________________________________________________ Maxim Integrated Products

OUT2

OUT1

General Description

RSTIN/PFI

MAX6715A-

MAX6729A/

MAX6797A

MAX67_ _

Industrial Equipment

Printers/Fax Machines

Set-Top Boxes

Applications

WDI

PFO

RST

RESET

I/O

NMI

SUPPLY

I/O

1 or V

1.8V

µP

SUPPLY

CORE

0.9V

o V

o Externally Adjustable RSTIN Threshold for

o Watchdog Timer Option

o Manual-Reset Input Option

o Power-Fail Input/Power-Fail Output Option

o Guaranteed Reset Valid Down to V

o Reset Output Logic Options

o Immune to Short V

o Low Supply Current 14µA (typ) at 3.6V

o Watchdog Disable Feature

o Small 5-, 6-, and 8-Pin SOT23 Packages

+ Denotes a lead-free/RoHS-compliant package.

T = Tape and reel.

Note: The first “_ _” are placeholders for the threshold voltage

levels of the devices. Desired threshold levels are set by the part

number suffix found in the Reset Voltage Threshold Suffix Guide.

The “_” after the D is a placeholder for the reset timeout delay

time. Desired delay time is set using the timeout period suffix

found in the Reset Timeout Period Suffix Guide. For example, the

MAX6716AUTLTD3-T is a dual-voltage supervisor V

4.625V, V

Ordering Information continued at end of data sheet.

Pin Configurations and Selector Guide appear at end of

data sheet.

MAX6715AUT_ _D_+T

MAX6716AUT_ _D_+T

MAX6717AUK_ _D_+T

MAX6718AUK_ _D_+T

MAX6719AUT_ _D_+T

MAX6720AUT_ _D_+T

from 1.58V to 4.63V

Voltages from 0.79V to 3.08V

Auxiliary/Triple-Voltage Monitoring

(0.62V Internal Reference)

(Push-Pull and Open-Drain Active-Low)

35s (min) Long Startup Period

1.12s (min) Normal Timeout Period

Supervisory Circuits

1 (Primary Supply) Reset Threshold Voltages

2 (Secondary Supply) Reset Threshold

2 = 0.8V

PART

2 = 3.075V, and 210ms (typ) timeout period.

Ordering Information

-40°C to +125°C

Transients

TEMP RANGE

Features

1 or

PIN-

PACKAGE

6 SOT23

5 SOT23

6 SOT23

1 =

Related parts for MAX3107ETG/V+T

MAX3107ETG/V+T Summary of contents

Page 1

... R1 MAX6729A/ MAX6797A RSTIN/PFI MR R2 MAX67_ _ PUSHBUTTON SWITCH ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Supervisory Circuits (Primary Supply) Reset Threshold Voltages CC from 1.58V to 4.63V (Secondary Supply) Reset Threshold CC Voltages from 0 ...

Page 2

Dual/Triple, Ultra-Low-Voltage, SOT23 µP Supervisory Circuits ABSOLUTE MAXIMUM RATINGS Terminal Voltage (with respect to GND ..........................................................-0. Open-Drain RST, RST1, RST2, PFO, RST ................-0.3V to +6V Push-Pull RST, RST1, PFO, RST...............-0. ...

Page 3

Dual/Triple, Ultra-Low-Voltage, SOT23 µP ELECTRICAL CHARACTERISTICS (continued 0.8V to 5.5V 0.8V to 5.5V, GND = 0V +25°C.) (Note 1) PARAMETER SYMBOL ∆V Reset Threshold Tempco Reset Threshold Hysteresis ...

Page 4

Dual/Triple, Ultra-Low-Voltage, SOT23 µP Supervisory Circuits ELECTRICAL CHARACTERISTICS (continued 0.8V to 5.5V 0.8V to 5.5V, GND = 0V +25°C.) (Note 1) PARAMETER SYMBOL RESET/POWER-FAIL OUTPUTS RST/RST1/RST2/PFO Output LOW (Push-Pull or Open-Drain) ...

Page 5

Dual/Triple, Ultra-Low-Voltage, SOT23 µ 5V 3.3V +25°C, unless otherwise noted SUPPLY CURRENT vs. TEMPERATURE ( +5V +3.3V TOTAL ...

Page 6

Dual/Triple, Ultra-Low-Voltage, SOT23 µP Supervisory Circuits ( 5V 3.3V +25°C, unless otherwise noted RSTIN INPUT TO RESET OUTPUT DELAY vs. TEMPERATURE 24 30mV OVERDRIVE ...

Page 7

Dual/Triple, Ultra-Low-Voltage, SOT23 µP MAX6715A/ MAX6717A/ MAX6719A/ MAX6721A/ MAX6716A MAX6718A MAX6720A MAX6722A 5 — — _______________________________________________________________________________________ Supervisory Circuits PIN MAX6723A/ MAX6725A/ MAX6727A MAX6724A MAX6726A — — — — ...

Page 8

Dual/Triple, Ultra-Low-Voltage, SOT23 µP Supervisory Circuits M AX6 7 1 5A/ M AX6 7 1 7A/ M AX6 7 1 9A/ M AX6 7 2 1A/ M AX6 AX6 AX6 7 2 ...

Page 9

Dual/Triple, Ultra-Low-Voltage, SOT23 µ ...

Page 10

Dual/Triple, Ultra-Low-Voltage, SOT23 µP Supervisory Circuits Detailed Description The MAX6715A–MAX6729A/MAX6797A µP supervisory circuits maintain system integrity by alerting the µP to fault conditions. These ICs are optimized for systems that monitor two or three supply voltages. The output- reset state ...

Page 11

Dual/Triple, Ultra-Low-Voltage, SOT23 µP The normal watchdog timeout period (1.12s min) begins after the first transition on WDI before the con- clusion of the long initial watchdog period (Figure 2). During the normal operating mode, the supervisor will issue a ...

Page 12

Dual/Triple, Ultra-Low-Voltage, SOT23 µP Supervisory Circuits Applications Information Interfacing to µPs with Bidirectional Most µPs with bidirectional reset pins can interface directly to open-drain RST output options. Systems simultaneously requiring a push-pull RST output and a bidirectional reset interface can ...

Page 13

Dual/Triple, Ultra-Low-Voltage, SOT23 µP magnitude indicated (reset threshold overdrive). The graph shows the maximum pulse width that a negative- going V transient may typically have without causing CC a reset pulse to be issued. As the amplitude of the tran- ...

Page 14

Dual/Triple, Ultra-Low-Voltage, SOT23 µP Supervisory Circuits RSTIN/PFI 14 ______________________________________________________________________________________ REF RESET TIMEOUT PERIOD REF CC V REF/2 Functional Diagram PULLUP V 1 ...

Page 15

Dual/Triple, Ultra-Low-Voltage, SOT23 µP NUMBER OF OPEN- PART VOLTAGE DRAIN NUMBER RESET MONITORS MAX6715A 2 MAX6716A 2 MAX6717A 2 MAX6718A 2 MAX6719A 3 MAX6720A 3 MAX6721A 2 MAX6722A 2 MAX6723A 3 MAX6724A 3 MAX6725A 3 MAX6726A 3 MAX6727A 3 MAX6728A ...

Page 16

Dual/Triple, Ultra-Low-Voltage, SOT23 µP Supervisory Circuits Table 1. Reset Voltage Threshold Suffix Guide** PART NUMBER V 1 NOMINAL CC SUFFIX VOLTAGE (_ _) THRESHOLD (V) LT 4.625 MS 4.375 MR 4.375 TZ 3.075 SY 2.925 RY 2.625 TW 3.075 SV ...

Page 17

Dual/Triple, Ultra-Low-Voltage, SOT23 µP TOP VIEW RST1 MAX6715A/ GND 2 5 RST2 MAX6716A SOT23 RST MAX6721A/ GND 2 5 WDI MAX6722A SOT23 RST 1 GND 2 ...

Page 18

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products ...

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