ST485ERXDR

ST485ERB ±15 kV ESD protected, low-power RS-485/RS-422 transceiver Datasheet - production data Description The ST485ERB is a low-power transceiver for RS-485 and RS-422 communication. Each driver output and receiver input is protected against ±15 kV electrostatic discharge (HBM) ± 8 kV (IEC-1000-4-2 contact discharge) shocks, without latch-up. These parts contain one driver and one receiver. This transceiver draws 300 µA (typ.) of supply current when unloaded or fully loaded with disabled drivers. Features Low quiescent current: 300 µA Designed for RS-485 interface applications - 7 V to 12 V common mode input voltage range Driver maintains high impedance in 3-state or with the power OFF 70 mV typical input hysteresis 30 ns propagation delay, 5 ns skew Operates from a single 5 V supply Current limiting and thermal shutdown for driver overload protection ESD protection: ± 15 kV (HBM) ± 8 kV (IEC-1000-4-2 contact discharge) Allows up to 64 transceivers on the bus October 2016 It operates from a single 5 V supply. The driver is a short-circuit current which is limited and protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-impedance state. The ST485ERB is designed for bi-directional data communication on multipoint bus transmission lines (half-duplex applications). DocID9275 Rev 8 This is information on a product in full production. 1/19 www.st.com Contents ST485ERB Contents 1 Pin settings ...................................................................................... 3 2 Truth tables ...................................................................................... 4 3 4 Maximum ratings ............................................................................. 5 Electrical characteristics ................................................................ 6 5 Test circuit and typical characteristics .......................................... 9 6 Package information ..................................................................... 14 6.1 SO8 package information ................................................................ 15 6.2 SO8 tape and reel information ........................................................ 16 7 Ordering information..................................................................... 17 8 Revision history ............................................................................ 18 2/19 DocID9275 Rev 8 ST485ERB 1 Pin settings Pin settings Figure 1: Pin configuration RO 1 8 R VCC RE 2 7 B DE 3 6 A DI 4 5 GND D Table 1: Pin description Pin number Symbol Name and function 1 RO Receiver output 2 RE Receiver output enable 3 DE Driver output enable 4 DI Driver input 5 GND 6 A Non-inverting receiver input and non-inverting driver output 7 B Inverting receiver input and inverting driver output 8 VCC Ground Supply voltage DocID9275 Rev 8 3/19 Truth tables 2 ST485ERB Truth tables Table 2: Truth table (driver) Inputs RE Outputs DE DI B A H L H L H L X Z Z H X L Note: X = “don’t care”; Z = high impedance Table 3: Truth table (receiver) Inputs RE DE L L Outputs A-B RO ≥ 0.2 V H ≤ -0.2 V L Inputs open H X Z H Note: X = “don’t care”; Z = high impedance 4/19 DocID9275 Rev 8 ST485ERB 3 Maximum ratings Maximum ratings Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 4: Absolute maximum ratings Symbol VCC Parameter Supply voltage Value Unit 7 VI Control input voltage ( RE , DE) -0.5 to (VCC + 0.5) VDI Driver input voltage (DI) -0.5 to (VCC + 0.5) VDO Driver output voltage (A, B) ± 14 VRI Receiver input voltage (A, B) ± 14 VRO Receiver output voltage (RO) -0.5 to (VCC + 0.5) DocID9275 Rev 8 V 5/19 Electrical characteristics 4 ST485ERB Electrical characteristics Table 5: ESD performance: transmitter outputs, receiver inputs Symbol ESD Parameter ESD protection voltage Test conditions Min. Human body model ±15 IEC-1000-4-2 ±8 Typ. Max. Unit — — kV In the EC tables below, VCC = 5 V ± 5 %, TA = TMIN to TMAX, unless otherwise specified. Typical values are referred to T A = 25 °C. Table 6: DC electrical characteristics Symbol VOD1 VOD2 ΔVOD VOC ΔVOC 6/19 Parameter Test conditions (1) Min. Typ. Differential driver output (no load) Differential driver output (with load) Max. Unit 5 RL = 27 Ω (RS-485), see Figure 2 1.5 5 RL = 50 Ω (RS-422), see Figure 2 1.5 5 Change in magnitude of driver differential output voltage for complementary output states RL = 27 Ω or 50 Ω, see Figure 2 0.2 Driver common-mode output voltage RL = 27 Ω or 50 Ω, see Figure 2 3 Change in magnitude of driver common-mode output voltage for complementary output states RL = 27 Ω or 50 Ω, see Figure 2 0.2 V VIH Input high voltage RE , DE, DI VIL Input low voltage RE , DE, DI 0.8 IIN1 Input current RE , DE, DI ±2 IIN2 Input current (A, B), VCM = 0 V or 5.25 V, VDE = 0 V VTH Receiver differential threshold voltage VCM = -7 to 12 V ΔVTH Receiver input hysteresis VCM = 0 V VOH Receiver output high voltage IO = -4 mA, VID = 200 mV VOL Receiver output low voltage IO = 4 mA, VID = -200 mV 0.4 IOZR 3-state (high impedance) output current at receiver VO = 0.4 to 2.4 V ±1 RIN Receiver input resistance VCM = -7 to 12 V ICC No load supply current, VRE = 0 V or VCC (2) VDE = VCC 400 900 VDE = 0 V 300 500 2.0 VIN = 12 V 1 VIN = -7 V -0.8 DocID9275 Rev 8 -0.2 0.2 70 µA mA V mV 3.5 V µA kΩ 24 µA ST485ERB Electrical characteristics Symbol Parameter Test conditions (1) Min. Typ. Max. IOSD1 Driver short-circuit current, VO = high VO = -7 to 12 V (3) 35 250 IOSD2 Driver short-circuit current, VO = low VO = -7 to 12 V (3) 35 250 IOSR Receiver short-circuit current VO = 0 V to VCC 7 95 Unit mA Notes: (1)All currents into device pins are positive; all currents out of device pins are negative; all voltages are referenced to device ground unless specified. (2)Supply (3)Applies current specification is valid for loaded transmitters when V DE = 0 V to peak current Table 7: Driver switching characteristics Symbol Parameter Test conditions (1) Min. Typ. Max. 10 30 60 5 10 15 40 Propagation delay input to output RDIFF = 54 Ω, CL1 = CL2 = 100 pF, see Figure 4 and Figure 6 tSK Output skew to output RDIFF = 54 Ω, CL1 = CL2 = 100 pF, see Figure 4 and Figure 6 tTLH, tTHL Rise or fall time RDIFF = 54 Ω, CL1 = CL2 = 100 pF, see Figure 4 and Figure 6 tPZH Output enable time CL = 100 pF, S2 = closed, see Figure 5 and Figure 7 70 90 tPZL Output enable time CL = 100 pF, S1 = closed, see Figure 5 and Figure 7 70 90 tPLZ Output disable time CL = 15 pF, S1 = closed, see Figure 5 and Figure 7 70 90 tPHZ Output disable time CL = 15 pF, S2 = closed, see Figure 5 and Figure 7 70 90 CAB Output AB capacitance tPLH, tPHL 3 43 Unit ns pF Notes: (1)All currents into device pins are positive; all currents out of device pins are negative; all voltages are referenced to device ground unless specified. DocID9275 Rev 8 7/19 Electrical characteristics ST485ERB Table 8: Receiver switching characteristics Symbol Parameter Test conditions (1) Min. Typ. Max. 20 130 210 tPLH, tPHL Propagation delay input to output RDIFF = 54 Ω,CL1 = CL2 = 100 pF, see Figure 4 and Figure 8 tSKD Differential receiver skew RDIFF = 54 Ω, CL1 = CL2 = 100 pF, see Figure 4 and Figure 8 13 tPZH Output enable time CRL = 15 pF, S1 = closed, see Figure 2 and Figure 9 20 50 tPZL Output enable time CRL = 15 pF, S2 = closed, see Figure 2 and Figure 9 20 50 tPLZ Output disable time CRL = 15 pF, S1 = closed, see Figure 2 and Figure 9 20 50 tPHZ Output disable time CRL = 15 pF, S2 = closed, see Figure 2 and Figure 9 20 50 fMAX Maximum data rate Unit ns 2.5 Mbps Notes: (1)All currents into device pins are positive; all currents out of device pins are negative; all voltages are referenced to device ground unless specified 8/19 DocID9275 Rev 8 ST485ERB 5 Test circuit and typical characteristics Test circuit and typical characteristics Figure 3: Receiver timing test load Figure 2: Driver DC test load Y R R = 1 kΩ Output under test CRL = 15 pF VOD R S1 + VCC R = 1 kΩ S2 VOC Z Figure 4: Drive/receiver timing test circuit Figure 5: Driver timing test load 3V DE Y VID CL1 R = 500 Ω Y DI RO Output under test CL Z RDIFF CL2 Z + VCC S1 RE S2 DocID9275 Rev 8 9/19 Test circuit and typical characteristics ST485ERB Figure 6: Driver propagation delay Figure 7: Driver enable and disable time 10/19 DocID9275 Rev 8 ST485ERB Test circuit and typical characteristics Figure 8: Receiver propagation delay Figure 9: Receiver enable and disable time DocID9275 Rev 8 11/19 Test circuit and typical characteristics ST485ERB Figure 10: Receiver output current vs. output low voltage Figure 11: Receiver output current vs. output high voltage Figure 12: Driver output current vs. output low voltage Figure 13: Driver output current vs. output high voltage Figure 14: Supply current vs. temperature Figure 15: Receiver high level output voltage vs. temperature 12/19 DocID9275 Rev 8 ST485ERB Test circuit and typical characteristics Figure 16: Receiver low level output voltage vs. temperature Figure 17: Differential driver output voltage vs. temperature DocID9275 Rev 8 13/19 Package information 6 ST485ERB Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK ® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. 14/19 DocID9275 Rev 8 ST485ERB 6.1 Package information SO8 package information Figure 18: SO8 package outline Table 9: SO8 mechanical data Dimensions Ref. Millimeters Min. Typ. A Inches Max. Min. Typ. 1.75 0.069 A1 0.10 A2 1.25 b 0.28 0.48 0.011 0.019 c 0.17 0.23 0.007 0.010 D 4.80 4.90 5.00 0.189 0.193 0.197 E 5.80 6.00 6.20 0.228 0.236 0.244 E1 3.80 3.90 4.00 0.150 0.154 0.157 e 0.25 Max 0.004 0.010 0.049 1.27 0.050 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 L1 k ccc 1.04 0° 0.040 8° 0.10 DocID9275 Rev 8 0° 8° 0.004 15/19 Package information 6.2 ST485ERB SO8 tape and reel information Figure 19: SO8 tape and reel outline 1. Drawing not to scale Table 10: SO8 tape and reel mechanical data Dimensions Symbol mm Min. Typ. A Max. Min. Typ. 330 12.8 D 20.2 0.795 N 60 2.362 Ao 8.1 Bo Ko 13.2 — Max. 12.992 C T 16/19 inch 0.504 22.4 0.519 — 0.882 8.5 0.319 5.5 5.9 0.216 0.232 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 DocID9275 Rev 8 0.335 ST485ERB 7 Ordering information Ordering information Table 11: Order code Order code Temperature range Package Packaging ST485ERBDR -40 to 85 °C SO8 (tape and reel) 2500 parts per reel DocID9275 Rev 8 17/19 Revision history 8 ST485ERB Revision history Table 12: Document revision history Date Revision Changes 21-Mar-2006 3 Order codes has been updated and new template. 01-Aug-2006 4 Mistake in cover page description 300 mA ==> 300 µA. 25-Oct-2006 5 Order codes updated. 02-Dec-2008 6 Modified: device name Table 1 on page 1. 16-Feb-2008 7 Modified Note on page 5. Updated "Features": replaced “allows up to 256 transceivers on the bus” by “64 transceivers”. Table 6: "DC electrical characteristics": updated footnote 3 04-Oct-2016 18/19 8 Removed DIP package Updated SO8 package Removed “Device summary” table to Section 7: "Ordering information". Removed obsolete order code ST485ERBN DocID9275 Rev 8 ST485ERB IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2016 STMicroelectronics – All rights reserved DocID9275 Rev 8 19/19