19-1616; Rev 0; 1/00
1ꢀ5k EꢁDꢂ-rotected, 2.ꢀk, 1µA, 4605bps,
Rꢁꢂ232 Compatible Transceivers
_______________General Description
____________________________Features
The MAX3316E–MAX3319E are 2.5V powered RS-232
compatible transceivers. These devices feature shut-
down (MAX3317E), AutoShutdown Plus™ (MAX3318E/
MAX3319E), and enhanced electrostatic discharge
(ESD) protection integrated into the chip. All transmitter
outputs and receiver inputs are protected to 15ꢀV
using the IEC 1000-4-2 Air-Gap Discharge method,
8ꢀV using the IEC 1000-4-2 Contact Discharge
method, and 15ꢀV using the ꢁuman ꢂodꢃ Model.
ꢀ ESD Protection for RS-232 I/O Pins
±±15kV—Humn ꢀoꢁd ꢂoꢁeꢃ
±ꢄ5kVIEꢅ ±ꢆꢆꢆ-ꢇ-2ꢈ ꢅontmct Discꢉmrꢊe
±±15kVIEꢅ ±ꢆꢆꢆ-ꢇ-2ꢈ ꢋir-ꢌma Discꢉmrꢊe
ꢀ 3ꢆꢆµꢋ Oaermtinꢊ SHaaꢃd ꢅHrrent
ꢀ ±µꢋ Low-Power SꢉHtꢁown witꢉ Receivers ꢋctive
ꢀ ꢌHmrmnteeꢁ ꢇ6ꢆ5bas Dmtm Rmte
All devices are guaranteed at a data rate of 460ꢀbps.
The transceivers have a proprietarꢃ low-dropout trans-
mitter output stage enabling RS-232 compatible opera-
tion from a +2.25V to +3.0V supplꢃ with a dual charge
pump. The charge pump requires onlꢃ four 0.1µF
capacitors. The MAX3318E/MAX3319E feature a logic-
level output (READY) that asserts when the charge
pump is regulating and the device is readꢃ to begin
transmitting.
ꢀ ꢌHmrmnteeꢁ ꢇk/µs Sꢃew Rmte
ꢀ RS-232 ꢅouamtibꢃe Down to 2.21k
Ordering Information
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
20 TSSOP
16 SSOP
MAX3316ECUP
MAX3316ECAE
MAX3316EEUP
MAX3316EEAE
MAX3317ECUP
MAX3317ECAP
MAX3317EEUP
MAX3317EEAP
MAX3318ECUP
MAX3318ECAP
MAX3318EEUP
MAX3318EEAP
MAX3319ECAE
MAX3319EEAE
20 TSSOP
16 SSOP
The MAX3318E/MAX3319E achieve a 1µA supplꢃ current
using Maxim’s revolutionarꢃ AutoShutdown Plus feature.
These devices automaticallꢃ enter a low-power shut-
down mode when the RS-232 cable is disconnected or
the transmitters of the connected peripherals are inactive
for more than 30 seconds. Theꢃ turn on again when
theꢃ sense a valid transition at anꢃ transmitter or receiver
input. AutoShutdown Plus saves power without
changes to the existing ꢂIOS or operating sꢃstem. The
MAX3317E also features a 1µA shutdown mode that
can be entered bꢃ driving SHDN low. The MAX3317E’s
receivers remain active while in shutdown mode, allowing
external devices such as modems to be monitored
using onlꢃ 1µA supplꢃ current.
20 TSSOP
20 SSOP
20 TSSOP
20 SSOP
20 TSSOP
20 SSOP
20 TSSOP
20 SSOP
16 SSOP
16 SSOP
These devices are available in space-saving pacꢀages:
MAX3316E (16-pin SSOP and 20-pin TSSOP), MAX3317E/
MAX3318E (20-pin SSOP and 20-pin TSSOP), and
MAX3319E (16-pin SSOP).
-in Configurations
READY
1
2
3
4
5
6
7
8
9
20 FORCEOFF
________________________Applications
C1+
V+
19 V
CC
18 GND
Palmtop Computers
ꢁand-ꢁeld Instruments
Pagers
C1-
17 T1OUT
16 R1IN
MAX3318E
C2+
C2-
15 R1OUT
Cellular Phones
GPS
V-
14
FORCEON
T2OUT
R2IN
13 T1IN
ꢁandꢃ Terminals
ꢁand-ꢁeld Electronic ꢂooꢀs
12 T2IN
R2OUT 10
11 INVALID
Selector Guide and Typical Application Circuits appear at
end of data sheet.
AutoShutdown Plus is a trademark of Maxim Integrated Products.
SSOP/TSSOP
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
±
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.