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ZT491ECN

Description
Low Power 5V 250kbps/10Mbps RS485 Transceivers
File Size575KB,14 Pages
ManufacturerETC
Download Datasheet View All

ZT491ECN Overview

Low Power 5V 250kbps/10Mbps RS485 Transceivers

ZT485E Low Power 5V 250kbps/10Mbps RS485 Transceivers
Zywyn Corporation
ZT4xxE
Zywyn
Features
• Meets or exceeds the requirements of ANSI Stan-
dard TIA/EIA-485-A and ISO 8482:1987(E) specifi-
cations for V
CC
at +5V ±5%
• Low quiescent current – 0.5mA typ., 1mA max.
• Low shutdown current (where applicable) - 0.01µA
typical, 10µA max.
• Guaranteed standard data rate 250kbps or 10Mbps
• Thermal shutdown protection
• -7V to +12V common-mode input voltage range
• Half-Duplex or Full-Duplex configuration
• Allows up to 1 unit load (32 devices) on the same
common bus
• Controlled driver output slew rate and receiver input
filtering
• Active-high driver enable and active-low receiver
enable
• ESD Protection on bus terminals
±15kV Human Body Model (HBM)
• Drop-in Replacements for MAX483E, MAX485E,
MAX488E, MAX489E, MAX490E, MAX491E.
• High fanout driving 1/4 unit load (128 devices)
available on ZT485ER Series
ZT483E, ZT485E, ZT488E
ZT489E, ZT490E, ZT491E
Low Power 5V 250kbps/10Mbps RS485 Transceivers
General Description
The ZT485E series devices are 5V differential data line
transceivers for RS485/RS422 communication that consist
of one driver and one receiver with high level of ESD
protection. They are designed for balanced transmission
lines interface that meet ANSI standard TIA/EIA-485-A and
ISO 8482:1987(E) specifications.
The ZT485E series devices spans out with half or full duplex,
data rate guaranteed at 250k bit per second or 10Mbps, and
allow one unit load that fan out 32 devices sharing a common
bus. The I/Os are enhanced-electrostatic discharge (ESD)
protected, exceeding ±15kV Human Body Model (HBM).
Applications
RS422/RS485 communications
Utility meters
Industrial process control
Building automation
Level tranlators
Transceivers for EMI-sensitive applications
Routers and HUBs
Industrial-controlled Local Area Networks
Industrial PCs, embedded PCs and peripherals
Industrial, security CATV and camera applications
ZT483E/ZT485E
Product Selection Guide And Cross Reference
Part
# 0f
Duplex
Number
Tx/Rx
ZT483E
ZT485E
ZT488E
ZT489E
ZT490E
ZT491E
Half
Half
Full
Full
Full
Full
1/1
1/1
1/1
1/1
1/1
1/1
Data
# of
Rate
Tx/Rx
(Mbps) on Bus
0.25
10
0.25
0.25
10
10
32
32
32
32
32
32
Slew
Rate
Limit
Yes
No
Yes
Yes
No
No
Now Available in Green Package Option
ESD
on
Tx/Rx
± 15kV
± 15kV
± 15kV
± 15kV
± 15kV
± 15kV
Number
of Pins
8
8
8
14
8
14
Pin-to-Pin
Cross
Reference
Rx
Low-
Tx/Rx
Input
Power
Enable
Filtering Shutdown
Yes
No
Yes
Yes
No
No
Yes
Yes
No
Yes
No
Yes
Yes
Yes
No
Yes
No
Yes
MAX483E
MAX485E
MAX488E
MAX489E
MAX490E
MAX491E
Zywyn
1
Specifications subject to change without notice
August 2004
rev.1.2
Zywyn Corporation • Tel (408) 733-3225 • Fax (408) 733-3206 • Email sales@zywyn.com • www.zywyn.com
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