SP3488 SIPEX | Alldatasheet
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10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation ■ 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. SP3488 and SP3489 SP3488RI1B RI1A RO 1 EN RO 2 RI2A RI2B GND VCC RI4B RI4A RO 4 EN RO RI3A RI3B SP3489RI1B RI1A RO 1 EN 1/EN2 RO 2 RI2A RI2B GND VCC RI4B RI4A RO 4 EN 3/EN4 RO 3 RI3A RI3B +3.3V Low Power Quad RS-485/RS-422 Line Receivers
10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation 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. V Input Voltages Input Currents Power Dissipation (derate 7mW/°C above +70°C) (derate 7mW/°C above +70°C) PARAMETER MIN. TYP. MAX. UNIT CONDITIONS DC CHARACTERISTICS Digital Inputs EN, EN, EN 1/EN2, EN3/EN4 Voltage VIL 0.8 Volts VIH 2.0 Volts Input Current ±2 µA 0V ≤ VIN ≤ VCC RECEIVER INPUTS Input Resistance 12 k Ω -7V ≤ VCM ≤ 12V Differential Input Threshold -0.2 +0.2 Volts -7V ≤ VCM ≤ 12V Input Current (A, B) V CC = 0V or 3.3V; IIN2 +1.0 mA V IN = +12V -0.8 mA V IN = –7V Maximum Data Rate 10 Mbps RECEIVER OUTPUTS Output Voltage VOH VCC -0.4 V I O = -1.5mA; VID = +0.2V VOL 0.4 V I O = +2.5mA; VID = -0.2V High Impedance Output Current ±1 µA VCC = maximum; 0.4V ≤ VO ≤ VCC POWER REQUIREMENTS Supply Current 2.2 5 mA No load ENVIRONMENTAL AND MECHANICAL Operating Temperature –C 0 +70 °C –E -40 +85 °C Storage Temperature -65 +150 °C Package –_P 16–pin Plastic DIP –_T 16–pin SOIC SPECIFICATIONS VCC = +3.3V±5%; typicals at 25°C; TMIN ≤ TA ≤ TMAX unless otherwise noted.
200mV, Receiver 4 output is low. Pin 14 — RI4A — Receiver 4 input A. Pin 15 — RI4B — Receiver 4 input B. Pin 1 — RI1B — Receiver 1 input B. Pin 2 — RI1A — Receiver 1 input A. Enable. Please refer to SP3489 Truth Table (2). 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. Table 1. SP3488 Truth Table Pin 9 — RI3B — Receiver 3 input B. Pin 10 — RI3A — Receiver 3 input A. 200mV, Receiver 3 output is low. Enable. Please refer to SP3489 Truth Table (2). 200mV, Receiver 4 output is low. Pin 14 — RI4A — Receiver 4 input A. Pin 15 — RI4B — Receiver 4 input B. Table 2. SP3489 Truth Table devices as well as popular industry standards. operation without sacrificing performance. applications or for long distance interfaces.
10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation PARAMETER MIN. TYP. MAX. UNIT CONDITIONS PROPAGATION DELAY Receiver Input to Output C L = 15pF; Figure 1, 3 Low to HIGH (tPLH) 75 115 ns High to LOW (tPHL)8 0 115 ns Differential Receiver Skew (tSKD )4 n s Receiver Rise Time (tR ) 10% to 90% SP3488 7 15 ns SP3489 7 15 ns Receiver Fall Time (t F) 90% to 10% SP3488 6 15 ns SP3489 6 15 ns RECEIVER ENABLE To Output HIGH 46 100 ns C L = 15pF; Figures 2 and 4 (S2 closed) To Output LOW 46 100 ns CL = 15pF; Figures 2 and 4 (S1 closed) RECEIVER DISABLE From Output LOW 46 100 ns CL = 15pF; Figures 2 and 4 (S1 closed) From Output HIGH 46 100 ns CL = 15pF; Figures 2 and 4 (S2 closed) 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.
10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation D ALTERNATE END PINS (BOTH ENDS) D1 = 0.005" min. (0.127 min.) E PACKAGE: PLASTIC DUAL–IN–LINE (NARROW) DIMENSIONS (Inches) Minimum/Maximum (mm) A = 0.210" max. (5.334 max). C ØL A1 = 0.015" min. (0.381min.) B e = 0.100 BSC (2.540 BSC) eA = 0.300 BSC (7.620 BSC) B C D E 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 D EH PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (WIDE) DIMENSIONS (Inches) Minimum/Maximum (mm) A Ø LBe A 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
ORDERING INFORMATION
Quad RS485 Receivers: 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. Corporation SIGNAL PROCESSING EXCELLENCE Please consult the factory for pricing and availability on a Tape-On-Reel option. 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