33990_06 Datasheet, PDF (3/16 Pages) Freescale Semiconductor, Inc – Enhanced Class B Serial Transceiver

PIN CONNECTIONS
PIN CONNECTIONS
SLEEP 11
GND 22
LOAD 33
BUS 44
88
RX
77
TX
66 _4X/LOOP
5 _{5 VBAT}
Figure 3. 33990 Pin Connections
Table 1. 33990 Pin Definitions
Pin Number
1
2
3
4
5
6
Pin Name
SLEEP
GND
LOAD
BUS
VBAT
4X/ LOOP
Definition
Enables the transceiver when Logic 1 and disables the transceiver when Logic 0.
Device ground pin.
Accommodates an external pull-down resistor to ground to provide loss of ground protection.
Waveshaped SAE Standard J-1850 Class B transmitter output and receiver input.
Provides device operating input power.
Tristate input mode control; Logic 0 = normal waveshaping, Logic 1 = waveshaping disabled for 4X
transmitting, high impedance = loopback mode.
7
TX
Serial data input (DI) from the microcontroller to be transmitted onto Bus.
8
RX
Bus received serial data output (DO) sent to the microcontroller.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33990
3