ST3293

ST3293 STMICROELECTRONICS | Alldatasheet

Document overview

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Technical content

■ FULL DUPLEX COMMUNICATIONS DEVICE RS-422 ■ PROGRAMMABLE EMPHASIS INCREASES T H ED I S T A N C EA N DD A T AR A T E ■ HIGH SPEED: DATA RATE UP TO 25Mbps ■ -7V TO 7V COMON-MODE INPUT VOLTAGE RANGE ■ LVTTL LOGIC INPUT THRESHOLDS

DESCRIPTION

The ST3293 is a high-speed RS-422 transceiver with an emphasis circuitry on the driver which allows reliable long distance communication 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 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. ORDERING CODES Type Temperature Range Package Comments ST3293BD -40 to 85 °C SO-14 (Tube) 50 parts per tube / 20 tube per box ST3293BDR -40 to 85 °C SO-14 (Tape & Reel) 2500 parts per reel ST3293 RS-422 HIGH SPEED TRANSCEIVER WITH DIGITAL EMPHASIS SOP

X= Don’t Care; Z=High Impedance PlN N° SYMBOL NAME AND FUNCTION

1 C0 Emphasis Control Input 0

2 C1 Emphasis Control Input 1

3 C2 Emphasis Control Input 2

4 PV CC Supply Voltage

5 RO Receiver Output

6 DI Driver Input

7 PGND Ground

8 Y Non-inverting Driver Output

9 Z Inverting Driver Output

10 B Inverting Receiver Input

11 A Non-inverting Receiver Input

12 PE Emphasis Enable

13 LGND Ground

H 0->1 H Enabled H 1->0 H Enabled

Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. RECOMMENDED OPERATING CONDITIONS INPUTS PE = HIGH DRIVER EMPHASIS FACTOR (DEF) C0 C1 C2 RL = 100 Ω LLL 1 . 0 L L H 1.1 LHL 1 . 2 L H H 1.3 H L L 1.4 HLH 1 . 5 H H L 1.6 HHH 1 . 7 Symbol Parameter Value Unit V CC Supply Voltage -0.5 to 7 V C0, C1, C2, DI, PE Control Input Voltage -0.5 to 7 V Y , Z Driver Output Voltage VCC =0 Vo rVOUT =Z - s t a t e -0.5 to 7 V A, B Receiver Input Voltage -14 to 14 V RO Receiver Output Voltage -0.5 to (V CC + 0.5) V PD Continuous Total Power Dissipation (SO-14) 0.5 W TJ Operating Junction Temperature Range -40 to 150 °C Tstg Storage Temperature Range -65 to 150 °C ESD Human Boby Model (Receiver Inputs vs GND) ±1 KV Symbol Parameter Test Conditions Min. Typ. Max. Unit VCC Supply Voltage 4.75 5.25 V V IH High Level Logic Input Voltage C0, C1, C2, DI, PE 2 V CC V VIL Low Level Logic Input Voltage C0, C1, C2, DI, PE 0 0.8 V IIN Input Current of Logic Input C0, C1, C2, DI, PE ±2 µA ICC Supply Current No Load 4 mA TA Operating Temperature Range -40 85 °C

DRIVER ELECTRICAL CHARACTERISTICS (VCC = 5V ± 5%, -40°C < TA < 85°C, unless otherwise noted. Typical values are referred to Ta = 25°C) RECEIVER DC ELECTRICAL CHARACTERISTICS (VCC = 5V ± 5%, -40°C < TA < 85°C, unless otherwise noted. Typical values are referred to Ta = 25°C) Symbol Parameter Test Conditions Min. Typ. Max. Unit |VOD | Differential Output Voltage No Load 2 V CC V |VOD1 | Differential Output Voltage without Emphasis R=1 0 0Ω , PE = Low 2 2.32 2.8 V DPER Differential Output Emphasis Step Precision See Truth Table 0.9 1.1 DEF Differential Output Emphasis Factor See Truth Table 1 2 |VOPD | Differential Driver Output with Emphasis R=1 0 0Ω , DEF = 1.1 2.52 V R=1 0 0Ω , DEF = 1.7 3.85 ΔVOD Change in Magnitude of Differential Output Voltage R=1 0 0Ω , All DEF values -0.2 0 0.2 V VOC Driver Common-Mode Output Voltage R=1 0 0Ω , All DEF values 1 V CC /2 3.5 V ΔVOC Change in Magnitude of Common Mode Output Voltage R=1 0 0Ω -0.2 0 0.2 V IOFF Output Leakage Current (Y and Z) VCC = GND V O = 6V 0.1 ±100 µA IOSD Driver Short Circuit Output Current VO =0 V , C0 = C1 = C2 = 0 -30 -50 -150 mA Symbol Parameter Test Conditions Min. Typ. Max. Unit V TH Receiver Differential Threshold Voltage -7V ≤ VCM ≤ 7V -200 200 mV VHYST Receiver Input Hysteresis VCM =0 V 5 0 m V V OL Low Level Output Voltage IOL = 4mA GND 0.2 0.4 mV VOH High Level Output Voltage IOH = -4mA 3.7 4.7 V CC mV IIN Input Current V IN=10V, Other Input = GND 0.32 1.5 mA VIN=10V, Other Input = GND -0.5 -2.5 R IN Receiver Input Resistance -7V≤ VCM ≤ 7V , VCC =0 V 1 2 2 4 K Ω

(VCC = 5V ± 5%, -40°C < TA < 85°C, unless otherwise noted. Typical values are referred to Ta = 25°C) Symbol Parameter Test Conditions Min. Typ. Max. Unit tDPLH tDPHL Driver Differential Propagation Delay, Low to High and High to Low R DIFF = 100Ω C L1 =C L2 = 50pF 16 25 ns tTLH ,tTHL Driver Differential rise and fall time R DIFF = 100Ω C L1 =C L2 = 50pF 8 12 ns tEDO Propagation delay time from PE, C0, C1, C2 to differential output without emphasis R DIFF = 100Ω C L1 =C L2 = 50pF |DO|-200mV 45 ns ts Setup Time PE to DI R DIFF = 100Ω C L1 =C L2 = 50pF -8 ns th Hold Time PE to DI R DIFF = 100Ω C L1 =C L2 = 50pF 8 ns tDSKEW Differential Driver Output Skew |tdPLH -tdPHL | R DIFF = 100Ω C L1 =C L2 = 50pF 1.5 3 ns fMAX Maximum Frequency R DIFF = 100Ω C L1 =C L2 = 50pF 25 40 Mbps tRLH, tRHL Receiver Propagation Delay CL =1 5 p F ,VID =2 V ,VCM =0 V 2 8 4 5 n s tRSKEW Receiver Output Skew |tRLH -tRHL | C L =1 5 p F 2 4 n s

Figure 1 :Test Circuit

DIM. mm. inch A 1.75 0.068 a1 0.1 0.2 0.003 0.007 a2 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45˚ (typ.) D 8.55 8.75 0.336 0.344 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 7.62 0.300 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M 0.68 0.026 S ˚ (max.) SO-14 MECHANICAL DATA PO13G

DIM. mm. inch A 330 12.992 C 12.8 13.2 0.504 0.519 D 20.2 0.795 N 60 2.362 T 22.4 0.882 Ao 6.4 6.6 0.252 0.260 Bo 9 9.2 0.354 0.362 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 Tape & Reel SO-14 MECHANICAL DATA

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