MAX3318_15 Datasheet, PDF (1/18 Pages) Texas Instruments – TRANSCEIVER WITH ESD PROTECTION

MAX3318
www.ti.com
SLLS687A – OCTOBER 2005 – REVISED OCTOBER 2013
2.5-V 460-kbps RS-232 TRANSCEIVER
WITH ±15-kV ESD PROTECTION
Check for Samples: MAX3318
FEATURES
1
• ESD Protection for RS-232 I/O Pins
– ±15 kV (Human-Body Model)
– ±8 kV (IEC 61000-4-2, Contact Discharge)
– ±8 kV (IEC 61000-4-2, Air-Gap Discharge)
• 300-μA Operating Supply Current
• 1-μA Low-Power Standby (With Receivers
Active) Mode
• Designed to Transmit at a Data Rate of
460 kbps
• Auto-Power-Down Plus Option Features
Flexible Power-Saving Mode
• Operates From a Single 2.25-V to 3-V V_CC
Supply
APPLICATIONS
• Battery-Powered Systems
• PDAs
• Cellular Phones
• Notebooks
• Hand-Held Equipment
• Pagers
DESCRIPTION
The MAX3318 is a dual-driver, dual-receiver, RS-232
compatible transceiver. The device features auto-
power-down plus and enhanced electrostatic
discharge (ESD) protection integrated into the chip.
Driver output and receiver input are protected to ±8
kV using the IEC 61000-4-2 Air-Gap Discharge
method, ±8 kV using the IEC 61000-4-2 Contact
Discharge method, and ±15 kV using the Human-
Body Model (HBM).
The device operates at a data rate of 460 kbps. The
transceiver has a proprietary low-dropout driver
output stage enabling RS-232-compatible operation
from a 2.25-V to 3-V supply with a dual charge pump.
The charge pump requires only four 0.1-μF
capacitors and features a logic-level output (READY)
that asserts when the charge pump is regulating and
the device is ready to begin transmitting.
The MAX3318 achieves a 1-μA supply current using
the auto-power-down feature. This device
automatically enters a low-power power-down mode
when the RS-232 cable is disconnected or the drivers
of the connected peripherals are inactive for more
than 30 s. The device turns on again when it senses
a valid transition at any driver or receiver input. Auto
power down saves power without changes to the
existing BIOS or operating system.
This device is available in two space-saving
packages: 20-pin SSOP and 20-pin TSSOP.
DB OR PW PACKAGE
(TOP VIEW)
READY 1
C1+ 2
V+ 3
C1− 4
C2+ 5
C2− 6
V− 7
DOUT2 8
RIN2 9
ROUT2 10
20 FORCEOFF
19 V_CC
18 GND
17 DOUT1
16 RIN1
15 ROUT1
14 FORCEON
13 DIN1
12 DIN2
11 INVALID
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.
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 © 2005–2013, Texas Instruments Incorporated