ST3293 Datasheet | STMicroelectronics

DESCRIPTION The ST3293 is a high-speed RS-422 transceiver with an emphasis circuitry on the driver which allows reliable long distance munication at high data rate by reducing inter symbolic interference. The differential amplitude of the ST3293 is digitally programmable in 7 steps through 3 control pins. The emphasis reduces the inter symbolic interference by increasing the signal amplitude under the micro control and counteracting the effects of the cable with the varying data stream. The ST3293 is a full duplex device that operates from a single +5V supply. It ORDERING CODES Type ST3293BD ST3293BDR Temperature Range -40 to 85 °C -40 to 85 °C Package features driver output short circuit current limiting and an open circuit fail-safe receiver input. The PE input can be used as an emphasis enable. The PE held LOW disable the emphasis instead set to HIGH enable the emphasis with the configuration on C0, C1 and C2 when DI change logic level. The DI input can direct drive the outputs with a fixed emphasis or without emphasis as shown in the timing diagram. ments 50 parts per tube / 20 tube per box 2500 parts per reel SO-14 (Tube) SO-14 (Tape & Reel) January 2003 1/11 PIN CONFIGURATION PIN DESCRIPTION Pl N N° 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SYMBOL C0 C1 C2 PVCC RO DI PGND Y Z B A PE LGND LVCC Emphasis Control Input 0 Emphasis Control Input 1 Emphasis Control Input 2 Supply Voltage Receiver Output Driver Input Ground Non-inverting Driver Output Inverting Driver Output Inverting Receiver Input Non-inverting Receiver Input Emphasis Enable Ground Supply Voltage NAME AND FUNCTION TRUTH TABLE TRANSMITTING INPUTS INPUTS PE L H H X= Don’t Care; Z=High Impedance OUTPUTS EMPHASIS STATUS DI X 0->1 1->0 PECTRL L H H Disabled Enabled Enabled 2/11 EMPHASIS CONTROL INPUT INPUTS PE = HIGH C0 L L L L H H H H C1 L L H H L L H H C2 L H L H L H L H DRIVER EMPHASIS FACTOR (DEF) RL = 100 Ω 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 ABSOLUTE MAXIMUM RATINGS Symbol VCC Supply...