Features: • 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) - 0.01A typical, 10A 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
Application• 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 applicationsPinout
SpecificationsThese are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
| Power Supply, (VCC) |
0.3V to +6.0V |
Input Voltages
DI, DE,RE (VIH), High Input Voltage
DI, DE, RE (VIL), Low Input Voltage |
+2V to +6.0V
0V to +0.8V |
| Differential Input Voltage, (VID) |
-12V to +12V |
| A, B (VI) |
+12V to -7V |
| Output Voltages RO |
0.3V to (VCC +0.3V) |
| Y, Z (A & B on ZT485) |
+12V to -7V |
| Operating Temperature |
40 to +85 |
| Storage Temperature |
65 to +150 |
DescriptionThe 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).
ZT491E Data Sheet
