SN65176BDR

UMW R SN75176B/ SN65176B SN75176B/SN65176B Multipoint RS-485/RS-422 Transceivers FEATURES DESCRIPTION • The SN75176B / SN65176B is a high speed differential TRI-STATE® bus/line transceiver designed to meet the requirements of EIA standard RS485 with extended common mode range (+12V to −7V), for multipoint data transmission. In addition, it is compatible with RS-422. The driver and receiver outputs feature TRI-STATE capability, for the driver outputs over the entire common mode range of +12V to −7V. Bus contention or fault situations that cause excessive power dissipation within the device are handled by a thermal shutdown circuit, which forces the driver outputs into the high impedance state. 1 23 • • • • • • • • Meets EIA Standard RS485 for Multipoint Bus Transmission and is Compatible with RS-422. Small Outline (SOIC) Package Option Available for Minimum Board Space. 22 ns Driver Propagation Delays. Single +5V Supply. −7V to +12V Bus Common Mode Range Permits ±7V Ground Difference Between Devices on the Bus. Thermal Shutdown Protection. High Impedance to Bus with Driver in TRISTATE or with Power Off, Over the Entire Common Mode Range Allows the Unused Devices on the Bus to be Powered Down. Combined Impedance of a Driver Output and Receiver Input is Less Than One RS485 Unit Load, Allowing up to 32 Transceivers on the Bus. 70 mV Typical Receiver Hysteresis. DC specifications are guaranteed over the 0 to 70°C temperature and 4.75V to 5.25V supply voltage range. Connection and Logic Diagram Figure 1. Top View These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. www.umw-ic.com 1 友台半导体有限公司 UMW SN75176B/ SN65176B R Absolute Maximum Ratings (1) (2) Supply Voltage, VCC 7V Control Input Voltages 7V Driver Input Voltage 7V Driver Output Voltages +15V/ −10V Receiver Input Voltages +15V/ −10V Receiver Output Voltage 5.5V Continuous Power Dissipation @ 25°C for SOIC Package 675 mW (3) for PDIP Package 900 mW (4) −65°C to +150°C Storage Temperature Range Lead Temperature (Soldering, 4 seconds) 260°C ESD Rating (HBM) (1) 500V “Absolute Maximum Ratings” are those beyond which the safety of the device cannot be verified. They are not meant to imply that the device should be operated at these limits. The tables of “Electrical Characteristics” provide conditions for actual device operation. If Military/Aerospace specified devices are required, please contact the HG Sales Office/Distributors for availability and specifications. Derate linearly @ 6.11 mW/°C to 400 mW at 70°C. Derate linearly at 5.56 mW/°C to 650 mW at 70°C. (2) (3) (4) Recommended Operating Conditions Supply Voltage, VCC Voltage at Any Bus Terminal (Separate or Common Mode) Min Max Units 4.75 5.25 V −7 +12 V Operating Free Air Temperature TA SN75176B 0 +70 °C SN65176B −40 +105 °C −12 +12 V Differential Input Voltage, VID (1) (1) Differential - Input/Output bus voltage is measured at the noninverting terminal A with respect to the inverting terminal B. Electrical Characteristics (1) (2) 0°C ≤ TA≤ 70°C, 4.75V < VCC< 5.25V unless otherwise specified Symbol VOD1 VOD2 ΔVOD Parameter Differential Driver Output Voltage (Unloaded) Differential Driver Output Voltage (with Load) Conditions Min Typ Max IO = 0 5 See (Figure 2) R = 50Ω; (RS-422) (3) R = 27Ω; (RS-485) Units V 2 V 1.5 V Change in Magnitude of Driver Differential Output Voltage For 0.2 V 3.0 V 0.2 V Complementary Output States VOC Driver Common Mode Output Voltage Δ|VOC| Change in Magnitude of Driver See (Figure 2) Common Mode Output Voltage For Complementary Output States (1) (2) (3) R = 27Ω All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless otherwise specified. All typicals are given for VCC = 5V and TA = 25°C. All worst case parameters for which this note is applied, must be increased by 10% for SN75176BT. The other parameters remain valid for −40°C < TA < +85°C. www.umw-ic.com 2 友台半导体有限公司 UMW SN75176B/ SN65176B R Electrical Characteristics (1) (2) (continued) 0°C ≤ TA≤ 70°C, 4.75V < VCC< 5.25V unless otherwise specified Symbol Parameter VIH Input High Voltage VIL Input Low Voltage VCL Input Clamp Voltage IIL Input Low Current IIH Input High Current IIN Input Current VTH Conditions 2 DI, DE, RE , E DO/RI, DO/RI V Differential Input Threshold Voltage for Receiver −1.5 VIL = 0.4V −200 μA VIH = 2.4V 20 μA VIN = 12V +1.0 mA DE = 0V VIN = −7V −0.8 mA +0.2 V −7V ≤ VCM ≤ + 12V Receiver Input Hysteresis VCM = 0V Receiver Output High Voltage IOH = −400 μA RO IIN = −18 mA VCC = 0V or 5.25V ΔVTH −0. 2 70 IOL = 16 mA Output Low Voltage OFF-State (High Impedance) VCC = Max Output Current at Receiver 0.4V ≤ VO ≤ 2.4V RIN Receiver Input Resistance −7V ≤ VCM ≤ +12V ICC Supply Current No Load (3) 0.5 V ±20 μA Driver Outputs Enabled 55 mA Driver Outputs Disabled 35 mA −250 mA 12 (3) VO = −7V Output Current VO = +12V Receiver Short-Circuit VO = 0V V (3) VOL Driver Short-Circuit mV 2.7 IOZR IOSR Units 0.8 VOH IOSD Min Typ Max (3) kΩ +250 mA −85 mA −15 Output Current Switching Characteristics VCC = 5.0V, TA = 25°C Typ Max tPLH Symbol Driver Input to Output Parameter RLDIFF = 60Ω Conditions Min 12 22 Units ns tPHL Driver Input to Output CL1 = CL2 = 100 pF 17 22 ns tr Driver Rise Time RLDIFF = 60Ω 18 ns tf Driver Fall Time CL1 =CL2 = 100 pF 18 ns (Figure 4 and Figure 6) tZH Driver Enable to Output High CL = 100 pF (Figure 5 and Figure 7) S1 Open 29 100 ns tZL Driver Enable to Output Low CL = 100 pF (Figure 5 and Figure 7) S2 Open 31 60 ns tLZ Driver Disable Time from Low CL = 15 pF (Figure 5 and Figure 7) S2 Open 13 30 ns tHZ Driver Disable Time from High CL = 15 pF (Figure 5 and Figure 7) S1 Open 19 200 ns tPLH Receiver Input to Output tPHL Receiver Input to Output CL = 15 pF (Figure 3 and Figure 8) S1 and S2 Closed tZL Receiver Enable to Output Low tZH 30 37 ns 32 37 ns CL = 15 pF (Figure 3 and Figure 9) S2 Open 15 20 ns Receiver Enable to Output High CL = 15 pF (Figure 3 and Figure 9) S1 Open 11 20 ns tLZ Receiver Disable from Low CL = 15 pF (Figure 3 and Figure 9) S2 Open 28 32 ns tHZ Receiver Disable from High CL = 15 pF (Figure 3 and Figure 9) S1 Open 13 35 ns www.umw-ic.com 3 友台半导体有限公司 UMW SN75176B/ SN65176B R AC TEST CIRCUITS Note: S1 and S2 of load circuit are closed except as otherwise mentioned. Figure 2. Figure 3. Note: Unless otherwise specified the switches are closed. Figure 4. Figure 5. Switching Time Waveforms Figure 6. Driver Propagation Delays and Transition Times Figure 7. Driver Enable and Disable Times www.umw-ic.com 4 友台半导体有限公司 UMW SN75176B/ SN65176B R Note: Differential input voltage may may be realized by grounding RI and pulsing RI between +2.5V and −2.5V Figure 8. Receiver Propagation Delays Figure 9. Receiver Enable and Disable Times Function Tables Table 1. SN75176B Transmitting (1) Inputs (1) Line Condition RE DE DI X 1 1 X 1 0 X 0 X 1 Outputs DO DO No Fault 0 1 No Fault 1 0 X X Z Z X Fault Z Z X — Don't care condition Z — High impedance state Fault — Improper line conditons causing excessive power dissipation in the driver, such as shorts or bus contention situations **This is a fail safe condition Table 2. SN75176B Receiving (1) Inputs (1) www.umw-ic.com Outputs RE DE RI-RI RO 0 0 ≥ +0.2V 1 0 0 ≤ −0.2V 0 0 0 Inputs Open** 1 1 0 X Z X — Don't care condition Z — High impedance state Fault — Improper line conditons causing excessive power dissipation in the driver, such as shorts or bus contention situations **This is a fail safe condition 5 友台半导体有限公司 UMW SN75176B/ SN65176B R SOP 8 www.umw-ic.com 友台半导体有限公司 6