SP3488CT

® SP3488 and SP3489 +3.3V Low Power Quad RS-485/RS-422 Line Receivers ■ RS-485 or RS-422 Quad Differential Line Receivers ■ Operates from a single +3.3V supply ■ Interoperable with +5.0V logic ■ Tri-state Output Control ■ -7V to +12V Common-Mode Input Voltage Range ■ Common Driver Enable Control (SP3488) ■ Independent Driver Enable Controls for each pair of Drivers (SP3489) ■ Compatibility with LTC488 and SN75173 (SP3488) ■ Compatibility with LTC489 and SN75175 (SP3489) DESCRIPTION… The SP3488 and the SP3489 are +3.3V low power quad line receivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with Sipex's SP488 and SP489 devices as well as popular industry standards. The SP3488 and SP3489 feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. The SP3488 and SP3489 meet the electrical specifications of RS-485 and RS-422 serial protocols up to 10Mbps under load. The SP3488 features a common receiver enable control. The SP3489 provides independent receiver enable controls for each pair of receivers. Both devices feature tri-state outputs and a -7V to +12V common-mode input range. The receivers have a fail-safe feature which forces a logic "1" output when receiver inputs are left floating. RI1B RI1A RO1 EN RO2 RI2A RI2B GND 1 2 3 4 5 6 7 8 SP3488 1 4 16 15 14 13 12 VCC RI4B RI4A RO4 EN RO3 RI3A RI3B RI1B RI1A RO1 EN1/EN2 RO2 RI2A RI2B GND 1 2 3 4 5 6 7 8 SP3489 1 4 16 15 14 13 12 VCC RI4B RI4A RO4 EN3/EN4 RO3 RI3A RI3B 2 3 11 10 9 2 3 11 10 9 10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS These are stress ratings only and functional operation of the device at these or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. VCC ......................................................................................... +6.0V Input Voltages Logic ...................................................................... –0.3V to +6.0V Receiver ............................................................................... ±14V Receiver Output Voltage .......................................... –0.3V to +6.0V Input Currents Logic .................................................................................. ±25mA Storage Temperature ............................................ –65°C to +150°C Power Dissipation Plastic DIP ........................................................................ 375mW (derate 7mW/°C above +70°C) Small Outline .................................................................... 375mW (derate 7mW/°C above +70°C) Lead Temperature (soldering, 10 sec) ................................... 300°C SPECIFICATIONS VCC = +3.3V±5%; typicals at 25°C; TMIN ≤ TA ≤ TMAX unless otherwise noted. PARAMETER DC CHARACTERISTICS Digital Inputs Voltage VIL VIH Input Current RECEIVER INPUTS Input Resistance Differential Input Threshold Input Current (A, B) MIN. TYP. MAX. UNIT CONDITIONS EN, EN, EN1/EN2, EN3/EN4 0.8 2.0 ±2 Volts Volts µA 0V ≤ VIN ≤ VCC 12 -0.2 +0.2 +1.0 -0.8 kΩ Volts mA mA Mbps Maximum Data Rate 10 RECEIVER OUTPUTS Output Voltage VOH VCC-0.4 VOL 0.4 High Impedance Output Current ±1 POWER REQUIREMENTS Supply Current 2.2 5 ENVIRONMENTAL AND MECHANICAL Operating Temperature –C 0 +70 –E -40 +85 Storage Temperature -65 +150 Package –_P 16–pin Plastic DIP –_T 16–pin SOIC -7V ≤ VCM ≤ 12V -7V ≤ VCM ≤ 12V VCC = 0V or 3.3V; IIN2 VIN = +12V VIN = –7V V V µA mA IO = -1.5mA; VID = +0.2V IO = +2.5mA; VID = -0.2V VCC = maximum; 0.4V ≤ VO ≤ VCC No load °C °C °C 10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation 2 15pF EN A S1 RCVR 54Ω 15pF EN 1/4 SP3488 RCVR ROn CL 1kΩ VCC DI DRIVER B CL 1kΩ S2 1/4 SP3486 Figure 1. Timing Test Circuit Figure 2. Enable/Disable Timing Test Circuit SP3488 PINOUT Pin 1 — RI1B — Receiver 1 input B. Pin 2 — RI1A — Receiver 1 input A. Pin 3 — RO1 — Receiver 1 Output — If Receiver 1 output is enabled, if RI1A > RI1B by 200mV, Receiver output is high. If Receiver 1 output is enabled, and if RI1A < RI1B by 200mV, Receiver 1 output is low. Pin 4 — EN — Receiver Output Enable. Please refer to SP3488 Truth Table (1). Pin 5 — RO2 — Receiver 2 Output — If Receiver 2 output is enabled, if RI2A > RI2B by 200mV, Receiver 2 output is high. If Receiver 2 output is enabled, and if RI2A < RI2B by 200mV, Receiver 2 output is low. PINOUT Pin 6 — RI2A — Receiver 2 input A. Pin 7 — RI2B — Receiver 2 input B. Pin 8 — GND — Digital Ground. Pin 9 — RI3B — Receiver 3 input B. Pin 10 — RI3A — Receiver 3 input A. Pin 11 — RO3 — Receiver 3 Output — If Receiver 3 output is enabled, if RI3A > RI3B by 200mV, Receiver 3 output is high. If Receiver 3 output is enabled, and if RI3A < RI3B by 200mV, Receiver 3 output is low. Pin 12 — EN — Receiver Output Enable. Please refer to SP3488 Truth Table (1). RI1B RI1A RO1 EN RO2 RI2A RI2B GND 1 2 3 4 5 6 7 8 SP3488 1 4 16 15 14 13 12 VCC RI4B RI4A RO4 EN RO3 RI3A RI3B RI1B RI1A RO1 EN1/EN2 RO2 RI2A RI2B GND 1 2 3 4 5 6 7 8 SP3489 1 4 16 15 14 13 12 VCC RI4B RI4A RO4 EN3/EN4 RO3 RI3A RI3B 2 3 11 10 9 2 3 11 10 9 10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation 3 Pin 13 — RO4 — Receiver 4 Output — If Receiver 4 output is enabled, if RI4A > RI4B by 200mV, Receiver 4 output is high. If Receiver 4 output is enabled, and if RI4A < RI4B by 200mV, Receiver 4 output is low. Pin 14 — RI4A — Receiver 4 input A. Pin 15 — RI4B — Receiver 4 input B. Pin 16 — VCC — Positive Supply +3.00V < VCC < +3.60V SP3489 PINOUT Pin 1 — RI1B — Receiver 1 input B. Pin 2 — RI1A — Receiver 1 input A. Pin 3 — RO1 — Receiver 1 Output — If Receiver 1 output is enabled, if RI1A > RI1B by 200mV, Receiver output is high. If Receiver 1 output is enabled, and if RI1A < RI1B by 200mV, Receiver 1 output is low. Pin 4 — EN1/EN2 — Receiver 1 and 2 Output Enable. Please refer to SP3489 Truth Table (2). Pin 5 — RO2 — Receiver 2 Output — If Receiver 2 output is enabled, if RI2A > RI2B by 200mV, Receiver 2 output is high. If Receiver 2 output is enabled, and if RI2A < RI2B by 200mV, Receiver 2 output is low. Pin 6 — RI2A — Receiver 2 input A. Pin 7 — RI2B — Receiver 2 input B. Pin 8 — GND — Digital Ground. Pin 9 — RI3B — Receiver 3 input B. Pin 10 — RI3A — Receiver 3 input A. Pin 11 — RO3 — Receiver 3 Output — If Receiver 3 output is enabled, if RI3A > RI3B by 200mV, Receiver 3 output is high. If Receiver 3 output is enabled, and if RI3A < RI3B by 200mV, Receiver 3 output is low. Pin 12 — EN3/EN4 — Receiver 3 and 4 Output Enable. Please refer to SP3489 Truth Table (2). Pin 13 — RO4 — Receiver 4 Output — If Receiver 4 output is enabled, if RI4A > RI4B by 200mV, Receiver 4 output is high. If Receiver 4 output is enabled, and if RI4A < RI4B by 200mV, Receiver 4 output is low. Pin 14 — RI4A — Receiver 4 input A. Pin 15 — RI4B — Receiver 4 input B. Pin 16 — VCC — Positive Supply +3.00V < VCC < +3.60V FEATURES... The SP3488 and the SP3489 are +3.3V low power quad line receivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with Sipex's SP488 and SP489 devices as well as popular industry standards. The S P3488 a nd S P3489 d evices feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. The RS-485 standard is ideal for multi-drop applications or for long distance interfaces. RS-485 allows up to 32 drivers and 32 receivers to be connected to a data bus, making it an ideal choice for multi-drop applications. Since the DIFFERENTIAL A–B VID ≥ 0.2V –0.2V < VID < +0.2V VID ≤ 0.2V X ENABLES EN1/EN2 or EN3/EN4 H H H L OUTPUT RO H X L Hi–Z DIFFERENTIAL A–B VID ≥ 0.2V –0.2V < VID < +0.2V VID ≤ 0.2V X EN H X H X H X L ENABLES EN X L X L X L H OUTPUT RO H H X X L L Hi–Z Table 1. SP3488 Truth Table 10/16/02 Table 2. SP3489 Truth Table © Copyright 2002 Sipex Corporation SP3488/3489 Low Power Quad RS-485/422 Line Receivers 4 cabling can be as long as 4,000 feet, RS-485 transceivers are equipped with a wide (-7V to +12V) common mode range to accomodate ground potential differences. Because the RS-485 protocol is a differential interface, data is virtually immune to noise in the transmission line. Receiver... The SP3488 and the SP3489 receivers have differential inputs with an input sensitivity as low as +100mV. Input impedance of the receivers is typically 15KΩ (12KΩ minimum). A wide common mode range of -7V to +12V allows for large ground potential differences between systems. The SP3488 features active HIGH and active LOW common receiver enable controls. Refer to SP3488 Truth Table in Table 1. The SP3489 provides independent, active high receiver enable controls for each pair of receivers. Refer to SP3489 Truth Table in Table 2. Both devices feature tri-state outputs and a -7V to +12V common-mode input range permitting a +7V ground difference between devices on the communication bus. The SP3488 and the SP3489 are equipped with a fail-safe feature which forces a logic HIGH at the receiver output when the input is left floating. The SP3488 and SP3489 receivers meet the electrical specifications of RS-485 and RS-422 serial protocol data rates up to 10Mbps under load. AC PARAMETERS VCC = +3.3V±5%; typicals at 25°C; TAMB = 25°C unless otherwise noted. PARAMETER MIN. PROPAGATION DELAY Receiver Input to Output Low to HIGH (tPLH) High to LOW (tPHL) Differential Receiver Skew (tSKD) Receiver Rise Time (tR) SP3488 SP3489 Receiver Fall Time (tF) SP3488 SP3489 RECEIVER ENABLE To Output HIGH To Output LOW RECEIVER DISABLE From Output LOW From Output HIGH TYP. MAX. UNIT CONDITIONS CL = 15pF; Figure 1, 3 75 80 4 7 7 6 6 46 46 115 115 15 15 15 15 100 100 ns ns ns ns ns 10% to 90% 90% to 10% ns ns ns ns CL = 15pF; Figures 2 and 4 (S2 closed) CL = 15pF; Figures 2 and 4 (S1 closed) CL = 15pF; Figures 2 and 4 (S1 closed) CL = 15pF; Figures 2 and 4 (S2 closed) 46 46 100 100 ns ns 10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation 5 Input A–B +VOD –VOD tPHL F = 1MHZ: tr < 10ns: tf < 10ns 0V tPLH 0V RO VOH VOL 1.5V 1.5V Figure 3. Receiver Propagation Delays 3V EN 0V tZL RO 5V VOL tZH RO VOH 0V F = 1MHZ: tr < 10ns: tf < 10ns 1.5V tLZ 1.5V 1.5V Output normally low tHZ Output normally high 1.5V 0.5V 0.5V Figure 4. Receiver Enable/Disable Timing 10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation 6 PACKAGE: PLASTIC DUAL–IN–LINE (NARROW) E1 E D1 = 0.005" min. (0.127 min.) D A1 = 0.015" min. (0.381min.) A = 0.210" max. (5.334 max). A2 C Ø eA = 0.300 BSC (7.620 BSC) L e = 0.100 BSC (2.540 BSC) B1 B ALTERNATE END PINS (BOTH ENDS) DIMENSIONS (Inches) Minimum/Maximum (mm) A2 B B1 C D E E1 L Ø 16–PIN 0.115/0.195 (2.921/4.953) 0.014/0.022 (0.356/0.559) 0.045/0.070 (1.143/1.778) 0.008/0.014 (0.203/0.356) 0.780/0.800 (19.812/20.320) 0.300/0.325 (7.620/8.255) 0.240/0.280 (6.096/7.112) 0.115/0.150 (2.921/3.810) 0°/ 15° (0°/15°) 10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation 7 PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (WIDE) E H D A Ø e B A1 L DIMENSIONS (Inches) Minimum/Maximum (mm) A A1 B D E e H L Ø 16–PIN 0.093/0.104 (2.352/2.649) 0.004/0.012 (0.102/0.300) 0.013/0.020 (0.330/0.508) 0.398/0.413 (10.10/10.49) 0.291/0.299 (7.402/7.600) 0.050 BSC (1.270 BSC) 0.394/0.419 (10.00/10.64) 0.016/0.050 (0.406/1.270) 0°/8° (0°/8°) 10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation 8 ORDERING INFORMATION Quad RS485 Receivers: Model .................................... Enable/Disable ........................................................... SP3488CP ........................... Common; active Low and Active High ...................... SP3488CT ............................ Common; active Low and Active High ...................... SP3488EP ............................ Common; active Low and Active High ...................... SP3488ET ............................ Common; active Low and Active High ...................... SP3489CP ........................... One SP3489CT ............................ One SP3489EP ............................ One SP3489ET ............................ One per per per per driver driver driver driver pair; pair; pair; pair; active active active active High ................................. High ................................. High ................................. High ................................. Temperature Range ................................................ Package 0°C to +70°C ........................................... 16–pin Plastic DIP 0°C to +70°C .................................................... 16–pin SOIC –40°C to +85°C ....................................... 16–pin Plastic DIP –40°C to +85°C ................................................ 16–pin SOIC 0°C to +70°C ........................................... 16–pin Plastic DIP 0°C to +70°C .................................................... 16–pin SOIC –40°C to +85°C ....................................... 16–pin Plastic DIP –40°C to +85°C ................................................ 16–pin SOIC Please consult the factory for pricing and availability on a Tape-On-Reel option. Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Sales Office 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 934-7500 FAX: (408) 935-7600 Sales Office 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: sales@sipex.com Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. 10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation 9