MAX3318EAP+ Maxim Integrated, MAX3318EAP+ Datasheet

MAX3318EAP+

Manufacturer Part Number

MAX3318EAP+

Description

RS-232 Interface IC

Manufacturer

Maxim Integrated

Series

MAX3316, MAX3317, MAX3318, MAX3319r

Datasheet

1.MAX3318CAP.pdf (16 pages)

Specifications of MAX3318EAP+

Data Rate

460 Kbps

Operating Supply Voltage

2.5 V

Supply Current

1 mA

Operating Temperature Range

0 C to + 70 C

Function

Transceiver

Number Of Drivers

Number Of I/os

Number Of Receivers

Propagation Delay Time Ns

0.175 us

Shutdown

Yes

Current page: 1 of 16
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The MAX6736–MAX6745 are low-power dual-/triple-

voltage microprocessor (µP) supervisors. These

devices assert a reset if any monitored supply falls

below its factory-trimmed or adjustable threshold and

maintain reset for a minimum timeout period after all

supplies rise above their thresholds. The integrated

dual/triple supervisory circuits significantly reduce size

and power compared to separate ICs or discrete com-

ponents. The low supply current of 6µA makes these

devices ideal for portable equipment.

The MAX6736/MAX6737 are dual fixed-voltage µP

supervisors with a manual reset input. The MAX6738/

MAX6739 have one fixed and one adjustable reset

threshold and a manual reset input. The MAX6740/

MAX6743 are triple-voltage µP supervisors with two

fixed and one user-adjustable reset threshold inputs.

The MAX6741/MAX6744 are dual-voltage µP supervi-

sors with a power-OK (POK) output ideal for power-

supply sequencing. The MAX6742/MAX6745 monitor

the primary V

power-fail comparator.

The MAX6736–MAX6745 monitor I/O supply voltages

threshold voltage options (Table 1). An external

adjustable RSTIN input option allows monitoring volt-

ages down to 0.5V.

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

with manual reset input and power-fail input/output fea-

tures are available (see the Selector Guide). The

MAX6736–MAX6745 are offered in a space-saving 5-pin

SC70 package and operate over the -40°C to +85°C

temperature range.

19-2531; Rev 2; 12/05

*Manual reset detect on RESET output.

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Portable/Battery-

Powered Equipment

Multivoltage Systems

Notebook Computers

MAX6736

MAX6737

MAX6738

PART

1) from 1.8V to 5.0V and core supply voltages

2) from 0.9V to 3.3V with factory-trimmed reset

________________________________________________________________ Maxim Integrated Products

1 fixed, 1 adj

MONITORS

Low-Power Dual-/Triple-Voltage SC70 µP

supply and have an independent

VOLTAGE

2 fixed

General Description

Controllers

PDAs

GPS Equipment

POS Equipment

OPEN-DRAIN

Applications

RESET

—

PUSH-PULL

RESET

—

♦ Dual-/Triple-Supply Reset Voltage Monitors

♦ Precision Factory-Set Reset Thresholds for

♦ Adjustable Reset Input Down to 0.488V

♦ 150ms and 1200ms (min) Reset Timeout Period

♦ V

♦ Power-Fail Input/Power-Fail Output

♦ 6µA Supply Current

♦ Tiny SC70 Package

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

voltage levels of the devices. Desired threshold levels are set

by the part number suffix found in Tables 1 and 2. The “_” after

the D is a placeholder for the reset timeout period suffix found

in Table 3. For example, the MAX6736XKLTD3-T is a dual-volt-

age supervisor V

minimum reset timeout period. All devices are available in

tape-and-reel only. There is a 2500-piece minimum order

increment for standard versions (see Table 1). Sample stock is

typically held on standard versions only. Nonstandard versions

require a minimum order increment of 10,000 pieces. Contact

factory for availability.

Devices are available in both leaded and lead-free packaging.

Specify lead-free by replacing “-T” with “+T” when ordering.

Ordering Information and Selector Guide continued at end

of data sheet.

Pin Configurations, Typical Application Circuits, and

Functional Diagram appear at end of data sheet.

MAX6736XK_ _D_-T

MAX6737XK_ _D_-T

Monitoring from 0.9V to 5.0V

Options

Sequencing Applications (MAX6741/MAX6744)

(MAX6742/MAX6745)

MANUAL

RESET

Supervisory Circuits

1 Power-OK Output for Power-Supply

PART

POWER-FAIL

1 = 4.625V, V

OUTPUT

INPUT/

—

Ordering Information

-40°C to +85°C

TEMP RANGE

2 = 3.075V, and a 150ms

Selector Guide

OUTPUT

POK

—

PIN-PACKAGE

5 SC70-5

Features

RSTIN

INPUT

—

Related parts for MAX3318EAP+

MAX3318EAP+ Summary of contents

Page 1

... MAX6737 2 fixed MAX6738 1 fixed, 1 adj *Manual reset detect on RESET output. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. Supervisory Circuits ♦ Dual-/Triple-Supply Reset Voltage Monitors ♦ Precision Factory-Set Reset Thresholds for Monitoring from 0.9V to 5.0V ♦ ...

Page 2

Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits ABSOLUTE MAXIMUM RATINGS POK1 to GND ......................................-0. Open-Drain RESET, PFO to GND.............................-0.3V to +6V Push-Pull RESET to GND..........................-0. MR, RSTIN, PFI to GND............................-0.3V ...

Page 3

Low-Power Dual-/Triple-Voltage SC70 µP ELECTRICAL CHARACTERISTICS (continued 1.2V to 5.5V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL Reset Threshold for RSTIN Threshold (MAX6738/ V MAX6739/MAX6740/MAX6743) ...

Page 4

Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits ELECTRICAL CHARACTERISTICS (continued 1.2V to 5.5V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL RESET Output Open-Drain Leakage Current I (MAX6736/MAX6738) POK1 Output ...

Page 5

Low-Power Dual-/Triple-Voltage SC70 µP ELECTRICAL CHARACTERISTICS (continued 1.2V to 5.5V -40°C to +85°C, unless otherwise noted. Typical values are PARAMETER SYMBOL POWER-FAIL COMPARATOR (MAX6742/MAX6745 only) Power Fail In Threshold (Note 5) Power ...

Page 6

Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits (T = +25°C, unless otherwise noted.) A NORMALIZED V TIMEOUT PERIOD vs. TEMPERATURE 1.019 1.014 1.009 1.004 0.999 0.994 0.989 0.984 -40 - TEMPERATURE (°C) NORMALIZED V CC vs. TEMPERATURE 1.008 1.003 ...

Page 7

Low-Power Dual-/Triple-Voltage SC70 µ +25°C, unless otherwise noted RESET OUTPUT DELAY 100ns/div V TO RESET OUTPUT DELAY CC 4µs/div _______________________________________________________________________________________ Supervisory Circuits Typical Operating Characteristics (continued) MAX6736-45 toc10 V MR 2V/div V RESET 2V/div MAX6736-45 ...

Page 8

Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits PIN MAX6736 MAX6738 MAX6740 MAX6741 MAX6737 MAX6739 MAX6743 MAX6744 — 4 — 4 — — — — — — — — ...

Page 9

Low-Power Dual-/Triple-Voltage SC70 µP Table 1. Reset Voltage Threshold Suffix Guide for MAX6736/MAX6737/MAX6740/ MAX6741/MAX6743/MAX6744 PART NO NOMINAL CC SUFFIX VOLTAGE ( THRESHOLD (V) LT 4.625 MS 4.375 MR 4.375 TZ 3.075 TW 3.075 TI 3.075 ...

Page 10

Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits GND POK1 t POKP GND GND MR GND RESET t RP GND Figure 1. Timing Diagram Detailed Description Supply Voltages The MAX6736–MAX6745 ...

Page 11

Low-Power Dual-/Triple-Voltage SC70 µP SWITCH BOUNCE OPEN PUSHBUTTON SWITCH CLOSED DEB RESET GND Figure 2. MAX6740/MAX6741/MAX6742 Manual Reset Timing Diagram released. The manual reset detect function is internally debounced for the t timeout period, so the ...

Page 12

Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits POSITIVE IN V EXT_TH MAX6742 MAX6745 EXT_TH R1 PFI PFO R2 GND NEGATIVE EXT_TH CC MAX6742 MAX6745 V R1 PFI PFO R2 ...

Page 13

Low-Power Dual-/Triple-Voltage SC70 µP The MAX6741/MAX6744 offer for V 1-to-V 2 sequencing. POK1 remains low long below its V 1 threshold. When exceeds V 1 for the ...

Page 14

Low-Power Dual-/Triple-Voltage SC70 µP Supervisory Circuits VOLTAGE OPEN-DRAIN PART MONITORS MAX6739 1 fixed, 1 adj MAX6740 2 fixed, 1 adj MAX6741 2 fixed MAX6742 1 fixed MAX6743 2 fixed, 1adj MAX6744 2 fixed MAX6745 1 fixed *Manual reset detect on ...

Page 15

Low-Power Dual-/Triple-Voltage SC70 µP TOP VIEW RESET MAX6736 GND 2 MAX6737 SC70 RESET GND POK1 Ordering Information (continued) PART TEMP RANGE MAX6738XK_D_-T -40°C to +85°C MAX6739XK_D_-T -40°C to +85°C MAX6740XK_ _D_-T ...

Page 16

... 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. 16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc ...

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