Zywyn Corporation
ZT4xxE
Zywyn
ZT483E, ZT485E, ZT488E
ZT489E, ZT490E, ZT491E
Low Power 5V 250kbps/10Mbps RS485E Transceivers
Features
General Description
• Meets or exceeds the requirements of ANSI Standard TIA/EIA-485-A and ISO 8482:1987(E) specifications for VCC 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
• True Fail-Safe (Open and Short) Receiver
• 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
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
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RS-422/RS-485 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
ZT483E/ZT485E
Now Available in Green Package Option
Product Selection Guide And Cross Reference
Part
# 0f
Duplex
Number
Tx/Rx
ZT483E
ZT485E
ZT488E
ZT489E
ZT490E
ZT491E
Half
Half
Full
Full
Full
Full
Zywyn
1/1
1/1
1/1
1/1
1/1
1/1
Data # of Tx/
Rx on
Rate
Bus
(Mbps)
0.25
32
10
32
0.25
32
0.25
32
10
32
10
32
Slew
Rate
Limit
Yes
No
Yes
Yes
No
No
LowRx
Tx/Rx ESD on
Power
Input
Enable Tx/Rx
Filtering Shutdown
Yes
Yes
Yes
± 15kV
No
Yes
Yes
± 15kV
Yes
No
No
± 15kV
Yes
Yes
Yes
± 15kV
No
No
No
± 15kV
No
Yes
Yes
± 15kV
Number
of Pins
8
8
8
14
8
14
Pin-toPin Cross
Reference
MAX483E
MAX485E
MAX488E
MAX489E
MAX490E
MAX491E
Specifications subject to change without notice
Zywyn Corporation • Tel (408) 733-3225 • Fax (408) 733-3206 1 Email sales@zywyn.com • www.zywyn.com
•
October 2005
rev. 1.4
