SP3493 SIPEX | Alldatasheet
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10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers © Copyright 2002 Sipex Corporation ■ Operates From A Single +3.3V Supply ■ Interoperable With +5V Logic ■ +200mV Receiver Input Sensitivity ■ -7V to +12V Common-Mode Input Voltage Range ■ Devices Allow Up To 32 Transceivers On The Serial Bus ■ Driver/Receiver Enable Lines (SP3494 ) ■ 2nA Low-Power Shutdown Mode (SP3494 ) ■ Compatible With The MAX3488, LTC490 and 75179 Industry Standard Pinouts (SP3493 ) ■ Compatible With The MAX3486 and 75176 Industry Standard Pinouts (SP3494 ) +3.3V Low Power RS-485/RS-422 Transceivers SP3493/SP3494
DESCRIPTION
The SP3493 and the 3494 devices are +3.3V, low power transceivers that meet the specifications of the RS-485 and RS-422 serial protocols. The SP3493 and the 3494 devices are pin-to-pin compatible with the Sipex SP3490 and the SP3481 devices, respectively, as well as other popular industry standards. The devices feature Sipex's BiCMOS process, allowing low power operation without sacrificing performance. The partially slew-rate limited drivers minimize EMI and reduce reflections caused by improperly terminated cables allowing error-free data transmission. The SP3493 is a full-duplex low power transceiver that will deliver a data transmission rate up to 250kbps. The SP3494 is a half-duplex partially slew-rate limited transceiver that will deliver a data transmission rate up to 2.5Mbps. The SP3494 is equipped with a low-power shutdown mode and driver/receiver high-Z enable lines. 4 5 R D Vcc GND R D A B Z Y RO 1 RE 2 DE 3 DI 4 8 V CC 7 B 6 A
5 GND
D R SP3493 SP3494
10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers © Copyright 2002 Sipex Corporation SPECIFICATIONS (continued) TAMB = TMIN to TMAX and VCC = 3.3V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP3493 RECEIVER AC Characteristics Maximum Data Rate 250 kbps Receiver Input to Output, tPLH 35 70 120 ns Figures 6 and 11 Receiver Input to Output, tPHL 35 70 120 ns Figures 6 and 11 Differential Receiver Skew 10 ns Figures 6 and 11 SP3493 POWER REQUIREMENTS Supply Current 1000 2000 µAD = 0 or V CC SP3494 DRIVER DC Characteristics Differential Output Voltage GND V CC Volts Unloaded; R = ∞; Figure 1 Differential Output Voltage 2 V CC Volts with load; R = 50Ω; (RS-422); Figure 1 Differential Output Voltage 1.5 V CC Volts with load; R = 27Ω; (RS-485); Figure 1 Change in Magnitude of Driver Differential Output Voltage for Complimentary States 0.2 Volts R = 27 Ω or R = 50Ω; Figure 1 Driver Common-Mode Output Voltage 3 Volts R = 27 Ω or R = 50Ω; Figure 1 Input High Voltage 2.0 Volts Applies to DE, DI, RE Input Low Voltage 0.8 Volts Applies to DE, DI, RE Input Current +10 µA Applies to DE, DI, RE Driver Short-Circuit Current V OUT = HIGH +250 mA -7V < VO < +12V VOUT = LOW +250 mA -7V < VO < +12V SP3494 DRIVER AC Characteristics Maximum Data Rate 2.5 Mbps RE = V CC , DE = VCC Driver Input to Output, tPLH 20 45 75 ns Figures 2 and 8 Driver Input to Output, tPHL 20 45 75 ns Figures 2 and 8 Differential Driver Skew 10 ns t DO1 - tDO2 , Figures 2 and 9 Driver Rise or Fall Time 30 70 ns From 10% to 90%, Figures 3 and 9 Driver Enable to Output High 52 120 ns Figures 4 and 10 Driver Enable to Output Low 60 120 ns Figures 5 and 10 Driver Disable Time from Low 40 120 ns Figures 5 and 10 Driver Disable Time from High 60 120 ns Figures 4 and 10 SP3494 RECEIVER DC Characteristics Differential Input Threshold -0.2 +0.2 Volts -7V < VCM < +12V Input Hysteresis 20 mV V CM = 0V Output Voltage High V CC -0.4 Volts V ID = +200mV, -1.5mA Output Voltage Low 0.4 Volts V ID = -200mV, 2.5mA Three-State (High Impedance) Output Current +1 µA 0V < VO < VCC ; RE = VCC Input Resistance 12 15 k Ω -7V < VCM < +12V Input Current (A, B); VIN = 12V 1.0 mA DE = 0V, V CC = 0V or 3.6V, VIN = 12V Input Current (A, B); VIN = -7V -0.8 mA DE = 0V, V CC = 0V or 3.6V, VIN = -7V Short-Circuit Current 7 60 mA 0V < VCM < VCC
10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers © Copyright 2002 Sipex Corporation SPECIFICATIONS (continued) TAMB = TMIN to TMAX and VCC = +3.3V ± 5% unless otherwise noted. PARAMETERS MIN. TYP. MAX. UNITS CONDITIONS SP3494 RECEIVER AC Characteristics Maximum Data Rate 2.5 Mbps RE = 0V, DE = 0V Receiver Input to Output, t PLH 40 70 100 ns Figures 6 and 11 Receiver Input to Output, tPHL 40 70 100 ns Figures 6 and 11 Differential Receiver Skew 10 ns t RSKEW = tRPHL - tRPLH , Figures 6 and 11 Receiver Enable to Output Low 35 60 ns Figures 7 and 12; S1 closed, S2 open Receiver Enable to Output High 35 60 ns Figures 7 and 12; S2 closed, S1 open Receiver Disable from Low 35 60 ns Figures 7 and 12; S1 closed, S2 open Receiver Disable from High 35 60 ns Figures 7 and 12; S2 closed, S1 open SP3494 SHUTDOWN TIMING Time to Shutdown 50 75 200 ns RE = 3.3V, DE = 0V Driver Enable from Shutdown to Output High 65 150 ns Figures 4 and 10 Driver Enable from Shutdown to Output Low 65 150 ns Figures 5 and 10 Receiver Enable from Shutdown to Output High 50 200 ns Figures 7 and 12; S2 closed, S1 open Receiver Enable from Shutdown to Output Low 50 200 ns Figures 7 and 12; S1 closed, S2 open SP3494 POWER REQUIREMENTS Supply Current No Load 1000 2000 µA RE, DI = 0V or VCC ; DE = VCC 800 1500 µA RE = 0V, DI = 0V or VCC ; DE = 0V Shutdown Mode 10 µA DE = 0V, RE=VCC
10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers © Copyright 2002 Sipex Corporation PIN FUNCTION - SP3493 Pin 1 - VCC - Positive supply +3.00 < VCC < +3.60 Pin 2 - R - Receiver output. Pin 3 - D - Driver input. Pin 4 - GND - Ground connection. Pin 5 - Y - Non-inverting driver output. Pin 6 - Z - Inverting driver output. Pin 7 - B - Inverting receiver input. Pin 8 - A - Non-inverting receiver input. 4 5 R D Vcc GND R D A B Z Y PIN FUNCTION - SP3494 Pin 1 – RO – Receiver Output. Pin 2 – RE – Receiver Output Enable Active LOW. Pin 3 – DE – Driver Output Enable Active HIGH. Pin 4 – DI – Driver Input. Pin 5 – GND – Ground Connection. Pin 6 – A – Driver Output/Receiver Input Non-inverting. Pin 7 – B – Driver Output/Receiver Input Inverting. Pin 8 – Vcc – Positive Supply +3.00V < VCC < +3.60V SP3494 Pinout RO 1 RE 2 DE 3 DI 4 8 V CC 7 B 6 A D R SP3493 Pinout
10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers © Copyright 2002 Sipex Corporation The SP3493/3494 are +3.3V transceivers that meet the electrical specifications of the RS-485 and RS-422 serial protocols. The SP3493/3494 feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. The SP3493 device is a +3.3V full-duplex transceiver that is pin-to-pin compatible with the Sipex SP3490 and SP490 devices as well as popular industry standards such as the MAX3488, the LTC490, and the 75179. The SP3493 has a driver with a data transmission rate of 250kbps. The SP3494 device is a +3.3V half-duplex transceiver that is pin-to-pin compatible with the Sipex SP3481 and SP481 devices as well as popular industry standards such as the MAX3486 and the 75176. The SP3494 has a partially slew- rate limited driver with a data transmission rate of 2.5Mbps. Drivers The SP3493/3494devices both have differential outputs. The typical voltage output swing with no load will bo 0V to V CC . With worst case loading of 54Ω across the differential outputs, the driver can maintain greater than 1.5V voltage levels. The SP3494 device has an enable control line which is active HIGH. A logic HIGH on DE (pin 3) will enable the differential driver outputs. A logic LOW on DE (pin 3) will force the driver outputs at high impedance (high-Z). The SP3493 device does not have a driver enable. The SP3493/SP3494 drivers will operate up to 250kbps and 2.5Mbps, respectively. In addition to adhering to the 250mA I SC maximum limit on the driver output, the driver output short-circuit protection will allow the devices to withstand an infinite short circuit over the -7.0V to +12V common mode range without damage. Receivers The receivers have differential inputs with an input sensitivity as low +200mV. 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. Both the SP3493/SP3494 receivers are equipped with fail-safe which guarantees that the receiver outputs will be in a high state when the input is left unconnected. The SP3494 receiver has a high impedance (high-Z) enable control pin. A logic LOW on RE (pin 2) will enable the receiver; a logic HIGH on RE (pin 2) will disable the receiver. The SP3494 is equipped with a shutdown mode. To enable the shutdown state, both the driver and receiver must be disabled simultaneously. A logic LOW on DE (pin 3) and a logic HIGH on RE (pin 2) will put the SP3494 into shutdown. In shutdown, the supply current will drop to 2nA typical, 1µA maximum.
00 Inputs Open 1
10 X Z
Table 1. Transmit Function Truth Table Table 2. Receive Function Truth Table Figure 1. Driver DC Test Load Circuit Figure 7. Receiver Enable and Disable Timing Circuit Figure 3. Driver Differential Output Delay and Figure 6. Receiver Propagation Delay Test Circuit Figure 4. Driver Enable and Disable Timing Circuit,
10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers © 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 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) 0.355/0.400 (9.017/10.160) 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°) 8–PIN
10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers © Copyright 2002 Sipex Corporation D EH PACKAGE: PLASTIC SMALL OUTLINE (SOIC) (NARROW) DIMENSIONS (Inches) Minimum/Maximum (mm) 8–PIN A Ø LBe h x 45° A B D E e H h L Ø 0.053/0.069 (1.346/1.748) 0.004/0.010 (0.102/0.249 0.014/0.019 (0.35/0.49) 0.189/0.197 (4.80/5.00) 0.150/0.157 (3.802/3.988)
0.050 BSC
(1.270 BSC) 0.228/0.244 (5.801/6.198) 0.010/0.020 (0.254/0.498) 0.016/0.050 (0.406/1.270) 0°/8° (0°/8°)
10/16/02 SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers © Copyright 2002 Sipex Corporation
ORDERING INFORMATION
Model Temperature Range Package SP3493CN 0˚C to +70˚C 8-pin Narrow SOIC SP3493CP 0˚C to +70˚C 8-pin Plastic DIP SP3493EN .-40˚C to +85˚C 8-pin Narrow SOIC SP3493EP -40˚C to +85˚C 8-pin Plastic DIP SP3494CN 0˚C to +70˚C 8-pin Narrow SOIC SP3494CP 0˚C to +70˚C 8-pin Plastic DIP SP3494EN -40˚C to +85˚C 8-pin Narrow SOIC SP3494EP -40˚C to +85˚C 8-pin Plastic DIP Please consult the factory for pricing and availability on a Tape-On-Reel option. Corporation SIGNAL PROCESSING EXCELLENCE 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. 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