HI-4855PCMF
| Model | HI-4855PCMF |
| Description | LINE TRANSCEIVER |
| PDF file | Total 14 pages (File size: 1M) |
| Chip Manufacturer | HOLTIC |
February 2013
High-Speed 3.0V to 5.5V,Slew-Rate Controlled RS-485/422
Transceivers with Extended Common-Mode Range
GENERAL DESCRIPTION
The
HI-485x devices are high-speed slew-rated controlled TIA-485/
TIA-422-B and ISO 8482:1993 compliant transceivers with
extended 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-4853 has a half-
duplex configuration, and the HI-4854 and HI-4855 are full-duplex.
Slew rates are optimized for data rates below 25Mbps. 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.
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)
20 Mbps Data Rate up to 100 ft. CAT-5 UTP
12 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
RE - 2
DE - 3
DI - 4
VDD - 1
RO - 2
DI - 3
GND - 4
8 - VDD
HI-4853PSx
7-B
6-A
5 - GND
8-A
HI-4854PSx
7-B
6-Z
5-Y
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
Miniature Munitions Stores Interface (MMSI / EBR-1553)
RO
RE
DE
DI
1
2
3
4
-5
GND 6
GND 7
-8
6-
5-
4
VDD
3-
12 A
11 B
10 Z
9 Y
APPLICATIONS
8-Pin Plastic SOIC package (Narrow Body)
Device Selection Table
Part
Half/Full
Number Duplex
HI-4853
HI-4854
HI-4855
Half
Full
Full
Data Rate
(Mbps)*
≤ 20.0
≤ 20.0
≤ 20.0
HI-4855PCx
Package
8-pin SOIC
8-pin SOIC
14-pin SOIC
16-pin QFN
16- pin 4mm x 4mm Chip-scale package
- 1
RO 2
RE 3
DE 4
DI 5
GND 6
GND 7
14 VDD
13 -
12 A
HI-4855PSx
11 B
10 Z
9 Y
8
-
* For RS-485 Transceivers optimized for data rates up
to 5Mbps please refer to the HI-4850 data sheet.
14-Pin Plastic SOIC package (Narrow Body)
(DS4853 Rev. C)
HOLT INTEGRATED CIRCUITS
www.holtic.com
02/13
