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MAX3073E Datasheet(PDF) 17 Page - Texas Instruments

Part # MAX3073E
Description  SN65HVD3x-EP 3.3-V Full-Duplex RS-485 Drivers And Receivers
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

MAX3073E Datasheet(HTML) 17 Page - Texas Instruments

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4
5
9
10
Y
Z
D
DE
A
B
12
11
2
R
3
RE
Low-Power
Standby
R
D
R
D
DE
RE
Y
Z
B
A
GND
V
CC
R
D
R
D
Y
Z
B
A
a) SN65HVD33, SN65HVD34,
SN65HVD35
b) SN65HVD30, SN65HVD31,
SN65HVD32
V
CC
GND
V
CC
SN65HVD30-EP, SN65HVD31-EP, SN65HVD32-EP
SN65HVD33-EP, SN65HVD34-EP, SN65HVD35-EP
www.ti.com
SGLS367E – SEPTEMBER 2006 – REVISED SEPTEMBER 2015
9 Detailed Description
9.1 Overview
The SN65HVD3x-EP devices are low-power, full-duplex RS-485 transceivers available in three speed grades
suitable for data transmission of 1 Mbps, 5 Mbps, and 50 Mbps.
The SN65HVD30, SN65HVD31, and SN65HVD32 devices are fully enabled with no external enabling pins. The
SN65HVD33, SN65HVD34, and SN65HVD35 devices have active-high driver enables and active-low receiver
enables. A standby current of less than 1 µA can be achieved by disabling both driver and receiver.
9.2 Functional Block Diagram
9.3 Feature Description
9.3.1 Low-Power Standby Mode
When both the driver and receiver are disabled (DE is low and RE is high), the device is in standby mode. If the
enable inputs are in this state for less than 60 ns, the device does not enter standby mode. This guards against
inadvertently entering standby mode during driver or receiver enabling. The device in standby mode only when
the enable inputs are held in this state for 300 ns or more. In this low-power standby mode, most internal circuitry
is powered down, and the supply current is typically less than 1 nA. When either the driver or the receiver is re-
enabled, the internal circuitry becomes active.
Figure 22. Low-Power Standby Logic Diagram
If only the driver is re-enabled (DE transitions to high) the driver outputs are driven according to the D input after
the enable times given by tPZH2 and tPZL2 in the driver switching characteristics. If the D input is open when the
driver is enabled, the driver output defaults to Y high and Z low, in accordance with the driver-failsafe feature.
Copyright © 2006–2015, Texas Instruments Incorporated
Submit Documentation Feedback
17
Product Folder Links: SN65HVD30-EP SN65HVD31-EP SN65HVD32-EP SN65HVD33-EP SN65HVD34-EP
SN65HVD35-EP


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