HI-4850 Datasheet, PDF (1/14 Pages) List of Unclassifed Manufacturers – Extended Power Supply Operating Range 3.0V to 5.5V

August 2012
GENERAL DESCRIPTION
The HI-485x devices are slew-rated controlled TIA-485/TIA-422-B
and ISO 8482:1993 compliant transceivers with extended power-
supply, temperature and receiver common-mode range for avionic
and industrial control applications. The devices can operate over an
extended supply (3.0V to 5.5V) and temperature (-55˚C to 125˚C)
range. The receiver input common-mode range of [-15, 20]V, and
±24V for the half and full duplex configurations respectively is valid
over the full supply and temperature specification. The HI-4850 has
a half-duplex configuration, and the HI-4851 and HI-4852 are full-
duplex. Slew rates are optimized for data rates below 5 Mbps. The
drivers slew-rate control and pre-emphasis reduces high-frequency
components in the output signal transitions and also compensates
for impedance mismatch. These features provide optimum EMI and
jitter performance, essential in EMI sensitive environments and
high-integrity data link applications such as in aerospace and
industrial controls.
The devices deliver at least ± 1.50V (VDD=3.0V), and ± 2.45V
(VDD= 4.5V) output levels at an extended temperature range of
-55°C to +125°C into a differential load of 54Ω and 50pF.
The receiver offers true Fail-Safe operation, providing a
guaranteed logic high on RO when the bus is open-circuit, short-
circuit, or idle (terminated but not driven). The receiver’s worst
case minimum input resistance is at least 90KΩ, supporting up to
224 nodes
APPLICATIONS
Extended Temperature Range RS-485/422 Networks
Process Control and Factory Automation
EMI Emission Sensitive Avionics
Industrial Field Bus Networks
Networks requiring extended common-mode range
FEATURES
Slew Rate Control and Pre-Emphasis for superior EMI
Extended Power Supply Operating Range 3.0V to 5.5V
Extended Receiver Common-Mode Range:
-15.0V to 20.0V Half-Duplex
±24V Full-Duplex
ESD Protection
16KV HBM (Bus Pins)
8KV HBM (Logic Pins)
5 Mbps Date Rate up to 100 ft. CAT-5 UTP
2 Mbps Data Rate up to 1000 ft. CAT-5 UTP
Current Limiting Protection
Extended Temperature Range -55°C to 125°C
Industry Standard 75176 Pin-out
PIN CONFIGURATIONS ^{(Top Views)}
RO - 1
8 - VDD
RE - 2
DE - 3
HI-4850PSx
7-B
6-A
DI - 4
5 - GND
VDD - 1
8-A
RO - 2
DI - 3
HI-4851PSx
7-B
6-Z
GND - 4
5-Y
8-Pin Plastic SOIC package (Narrow Body)
RO 1
RE 2
DE 3
DI 4
12 A
11 B
10 Z
9Y
Device Selection Table
Part Half/Full Data Rate
Number Duplex (Mbps)*
Package
HI-4850 Half
≤ 5.0
8-pin SOIC
HI-4851 Full
HI-4852 Full
≤ 5.0
≤ 5.0
8-pin SOIC
14-pin SOIC
16-pin QFN
* For RS-485 Transceivers optimized for data rates up
to 20Mbps please refer to the HI-4853 data sheet.
HI-4852PCx
16- pin 4mm x 4mm Chip-scale package
-1
RO 2
RE 3
DE 4
DI 5
GND 6
GND 7
HI-4852PSx
14 VDD
13 -
12 A
11 B
10 Z
9Y
8-
14-Pin Plastic SOIC package (Narrow Body)
(DS4850 Rev.B)
HOLT INTEGRATED CIRCUITS
www.holtic.com
08/12