MAX14840E Просмотр технического описания (PDF) - Maxim Integrated
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MAX14840E Datasheet PDF : 15 Pages
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40Mbps, +3.3V, RS-485 Half-Duplex
Transceivers
Pin Configurations
TOP VIEW
VCC B
87
A GND
65
MAX14840E
MAX14841E
+
*EP
1 234
RO RE DE DI
TDFN
*CONNECT EXPOSED PAD (EP) TO GND.
RO 1
RE 2
DE 3
DI 4
MAX14840E
MAX14841E
8 VCC
7B
6A
5 GND
SO
Pin Descriptions
PIN
NAME
FUNCTION
1
RO Receiver Output. See the Function Table.
Active-Low Receiver-Output Enable. Drive RE low to enable RO. RO is high impedance when RE is high.
2
RE Drive RE high and DE low to enter low-power shutdown mode. RE is a hot-swap input (see the Hot-Swap
Capability section for details).
Driver-Output Enable. Drive DE high to enable driver outputs. These outputs are high impedance when
3
DE DE is low. Drive RE high and DE low to enter low-power shutdown mode. DE is a hot-swap input (see the
Hot-Swap Capability section for details).
4
DI
Driver Input. With DE high, a low on DI forces the A output low and the B output high. Similarly, a high on
DI forces the A output high and the B output low.
5
GND Ground
6
A
Noninverting Receiver Input and Noninverting Driver Output
7
B
Inverting Receiver Input and Inverting Driver Output
8
VCC Positive Supply Voltage Input. Bypass VCC with a 0.1FF ceramic capacitor to GND.
—
EP Exposed Pad (TDFN Only). Connect EP to GND.
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