19-0426; Rev 1; 2/03
±15kV ESD-Protected, Quad,
Low-Power RS-232 Line Receiver
The MAX1489E is pin compatible with the MC1489,
MC14C89, SN75189, SN75C189, DS1489, and
DS14C89. It is available in 14-pin plastic DIP and SO
packages.
________________________Applications
____________________________Features
o Enhanced ESD Protection:
±15kV—Human Body Model
±8kV—IEC1000-4-2, Contact Discharge
±15kV—IEC1000-4-2, Air-Gap Discharge
o Latchup Free During an ESD Event
o Low 350µA Supply Current
o Input Hysteresis and Time-Domain Filtering
Eliminate the Need for External Filtering
o Stable Input Thresholds
o Pin Compatible with MC1489, MC14C89, SN75189,
SN75C189, DS1489, and DS14C89
PC Motherboards
______________Ordering Information
Modems
Interfacing Data Terminal Equipment (DTE) with
Data Circuit-Terminating Equipment (DCE)
Equipment Meeting IEC1000-4-2 (formerly
IEC801-2) or ±15kV ESD Protection
PART
TEMP RANGE
MAX1489ECPD
0°C to +70°C
14 Plastic DIP
PIN-PACKAGE
MAX1489ECSD
MAX1489EC/D
MAX1489EEPD
MAX1489EESD
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
14 SO
Dice*
14 Plastic DIP
14 SO
* Dice are specified at TA = +25°C.
__________Typical Operating Circuit
1⁄ MAX1489E
4
1⁄4 MAX1488E
__________________Pin Configuration
TOP VIEW
INPUT A 1
TTL/CMOS
LOGIC
INTERCONNECTING
CABLE
TTL/CMOS
LOGIC
MAX1489E
N.C. 2
13 INPUT D
OUTPUT A 3
12 N.C.
INPUT B 4
11 OUTPUT D
N.C. 5
1⁄4 MAX1488E
1⁄4 MAX1489E
10 INPUT C
MODEM
(DCE)
OUTPUT B 6
9
N.C.
GND 7
SIGNAL GROUND
PC
MOTHERBOARD
(DTE)
14 VCC
8
OUTPUT C
DIP/SO
________________________________________________________________ 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.
1
MAX1489E
_______________General Description
The MAX1489E quad, low-power line receiver is
designed for EIA/TIA-232, EIA/TIA-562, and CCITT V.28
communications in harsh environments. Each receiver
input is protected against ±15kV electrostatic discharge (ESD) shocks. These inputs have a ±25V range
and feature hysteresis and time-domain filtering. The
outputs are TTL and CMOS compatible. The MAX1489E
has a 120kbps guaranteed data rate. Supply current is
typically 350µA.