MAX3319CAE+ Maxim Integrated Products, MAX3319CAE+ Datasheet

IC TXRX RS232 460KBPS 16-SSOP

MAX3319CAE+

Manufacturer Part Number
MAX3319CAE+
Description
IC TXRX RS232 460KBPS 16-SSOP
Manufacturer
Maxim Integrated Products
Type
Transceiverr
Datasheet
1.MAX3316CAET.pdf (15 pages)

Specifications of MAX3319CAE+

Number Of Drivers/receivers
2/2
Protocol
RS232
Voltage - Supply
2.25 V ~ 3 V
Mounting Type
Surface Mount
Package / Case
16-SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX3316–MAX3319 transceivers have a proprietary
low-dropout transmitter output stage enabling RS-232-
compatible performance from +2.25V to +3.0V with a
dual-charge pump. These devices require only four
0.1µF capacitors, and are guaranteed to operate at data
rates up to 460kbps.
The MAX3318/MAX3319 achieve a 1µA supply current
using Maxim’s revolutionary AutoShutdown Plus™ fea-
ture. These devices automatically enter a low-power
shutdown mode when the RS-232 cable is disconnected
or the transmitters of the connected peripherals are inac-
tive for more than 30 seconds. They turn on again when
they sense a valid transition at any transmitter or receiver
input. AutoShutdown Plus saves power without changes
to the existing BIOS or operating system. The MAX3318
is a 2-Tx/2-Rx device while the MAX3319 is a 1-Tx/1-Rx
device. These devices also feature a logic-level output
(READY) that asserts when the charge pump is regulat-
ing and the device is ready to begin transmitting.
The MAX3316/MAX3317 are 2-Tx/2-Rx transceivers. The
MAX3317 features a 1µA shutdown mode that can be
entered by driving SHDN low. The MAX3317’s receivers
remain active while in shutdown mode, allowing external
devices such as modems to be monitored using only
1µA supply current.
These devices are available in space-saving packages:
MAX3316 (16-pin SSOP and 20-pin TSSOP), MAX3317/
MAX3318 (20-pin SSOP and 20-pin TSSOP), and
MAX3319 (16-pin SSOP).
________________________Applications
19-1751; Rev 0; 6/00
AutoShutdown Plus is a trademark of 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.
Pin Configurations appear at end of data sheet.
MAX3316
MAX3317
MAX3318
MAX3319
Palmtop Computers
Hand-Held Instruments
Pagers
Cellular Phones
GPS
Handy Terminals
Hand-Held Electronic Books
PART
________________________________________________________________ Maxim Integrated Products
NO. OF DRIVERS/
RECEIVERS
General Description
2/2
2/2
2/2
1/1
RS-232-Compatible Transceivers
DATA RATE (kbps)
GUARANTEED
460
460
460
460
READY OUTPUT
o AutoShutdown Plus (MAX3318/MAX3319)
o 300µA Operating Supply Current
o 1µA Low-Power Shutdown with Receivers Active
o Guaranteed 460kbps Data Rate
o Guaranteed 4V/µs Slew Rate
o RS-232 Compatible Down to 2.25V
Ordering Information continued at end of data sheet.
MAX3316CUP
MAX3316CAE
MAX3316EUP
MAX3316EAE
Typical Application Circuits continued at end of data sheet.
C
PART
BYPASS
—
—


0.1µF
0.1µF
OUTPUT
2.5V, 1µA, 460kbps,
CMOS
C2
CMOS
INPUT
C1
+2.5V
Typical Application Circuits
0.1µF
12
11
6
9
2
4
5
1
C1+
C1-
C2-
T1IN
C2+
R1OUT
READY
FORCEON
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
SHUTDOWN
0°C to +70°C
0°C to +70°C
Ordering Information
—
—
—

AutoShutdown
MAX3319
GND
Plus
V
CC
14
15
Selector Guide
FORCEOFF 16
INVALID 10
T1OUT 13
5k
PIN-PACKAGE
20 TSSOP
16 SSOP
20 TSSOP
16 SSOP
R1IN 8
AutoShutdown
V+
V-
Features
3
7
Plus
—
—


V
CC
TO POWER-
MANAGEMENT
UNIT
RS-232-
COMPATIBLE
OUTPUT
RS-232-
COMPATIBLE
INPUT
C3
0.1µF
C4
0.1µF
1

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MAX3319CAE+ Summary of contents

Page 1

... MAX3318 (20-pin SSOP and 20-pin TSSOP), and MAX3319 (16-pin SSOP). ________________________Applications Palmtop Computers Hand-Held Instruments Pagers Cellular Phones GPS Handy Terminals Hand-Held Electronic Books AutoShutdown Plus is a trademark of Maxim Integrated Products. Pin Configurations appear at end of data sheet. NO. OF DRIVERS/ PART RECEIVERS MAX3316 2/2 MAX3317 2/2 MAX3318 ...

Page 2

RS-232-Compatible Transceivers ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0. GND (Note 1) ..................................................-0. GND (Note 1) ...................................................-7V to +0. |V-| (Note 1) .................................................................+13V Input Voltages T_IN, ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +2.25V to +3.0V, C1–C4 = 0.1µ +25°C.) A PARAMETER SYMBOL Output Resistance Output Short-Circuit Current Output Leakage Current AutoShutdown Plus (FORCEON = GND, FORCEOFF = V Receiver Input Threshold to INVALID ...

Page 4

RS-232-Compatible Transceivers TIMING CHARACTERISTICS (continued +2.25V to +3.0V, C1–C4 = 0.1µ +25°C.) A PARAMETER SYMBOL Transition-Region Slew Rate Note 2: A transmitter/receiver edge is defined as a transition through the transmitter/receiver ...

Page 5

C1–C4 = 0.1µF, 460kbps data rate, all transmitters loaded with 3kΩ MAX3316/MAX3317 OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE 35 T1 TRANSMITTING AT SPECIFIED DATA RATE T2 TRANSMITTING AT 20kbps 30 25 460kbps 20 230kbps 15 ...

Page 6

RS-232-Compatible Transceivers (V = +2.5V, C1–C4 = 0.1µF, 460kbps data rate, all transmitters loaded with 3kΩ TRANSMITTER SKEW vs. ) LOAD CAPACITANCE ( PLH PHL 500 T1 TRANSMITTING AT 460kbps T2 TRANSMITTING AT ...

Page 7

PIN MAX3317 MAX3316 SSOP/ SSOP TSSOP TSSOP — — 20 — — — — — — — — — — — — Detailed Description Dual Charge-Pump Voltage Converter The MAX3316–MAX3319s’ internal power supply con- sists of a regulated dual charge ...

Page 8

RS-232-Compatible Transceivers Table 1. Output Control Truth Table (MAX3318/MAX3319) OPERATION FORCEON STATUS Shutdown (Forced X Off) Normal Operation 1 (Forced On) Normal Operation 0 (AutoShutdown Plus) Shutdown 0 (AutoShutdown Plus) INVALID* Normal Operation INVALID* Normal Operation INVALID* ...

Page 9

C BYPASS C1+ C1 0.1µF C1- C2+ C2 0.1µF C2 OUT Figure 1a. RS-232-Compatibility Circuit 5V/div 5V/div 5V/div Figure 1b. MAX3316–MAX3319 Transmitter Output Compatibility with an RS-232 Receiver _______________________________________________________________________________________ RS-232-Compatible Transceivers ...

Page 10

RS-232-Compatible Transceivers When shut down, the device’s charge pumps turn off pulled pulled to ground, the transmitter CC outputs are high impedance, and READY is driven low. The time required ...

Page 11

RECEIVER INPUTS TRANSMITTER INPUTS TRANSMITTER OUTPUTS V INVALID CC t INVL OUTPUT t INVH 0 READY *V CC OUTPUT *MAX3318/MAX3319 Figure 4b. AutoShutdown Plus, INVALID , and READY Timing Diagram POWER- MASTER SHDN LINE ...

Page 12

RS-232-Compatible Transceivers allel with 2500pF. The transmitter outputs display no ringing or undesirable transients as they come out of shutdown. Note that the transmitters are enabled only when the magnitude of V- exceeds approximately -3V. High Data ...

Page 13

RS-232-Compatible Transceivers TOP VIEW READY 1 20 FORCEOFF C1 GND C1 T1OUT MAX3318 C2 R1IN C2 R1OUT FORCEON T2OUT 8 13 T1IN R2IN 9 ...

Page 14

RS-232-Compatible Transceivers +2.5V 19 0.1µ C1 0.1µF C1- MAX3317 5 C2 0.1µF C2- 13 T1IN CMOS INPUTS T2IN 12 15 R1OUT CMOS OUTPUTS 10 R2OUT 1 EN GND 18 * ...

Page 15

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________15 © 2000 Maxim Integrated Products 2.5V, 1µ ...

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