ISL3332

¬ ISL3332, ISL3333 Data Sheet May 27, 2008 FN6362.0 3.3V, ±15kV ESD Protected, Two Port, Dual Protocol (RS-232/RS-485) Transceivers The ISL3332, ISL3333 are two port interface ICs where each port can be independently configured as a single RS-485/422 transceiver, or as a dual (2 Tx, 2 Rx) RS-232 transceiver. With both ports set to the same mode, two RS-485/RS-422 transceivers, or four RS-232 transceivers are available. If either port is in RS-232 mode, the onboard charge pump generates RS-232 compliant ±5V Tx output levels from a single VCC supply as low as 3.15V. The transceivers are RS-232 compliant, with the Rx inputs handling up to ±25V. In RS-485 mode, the transceivers support both the RS-485 and RS-422 differential communication standards. The receivers feature "full failsafe" operation, so the Rx outputs remain in a high state if the inputs are open or shorted together. The transmitters support up to three data rates, two of which are slew rate limited for problem free communications. The charge pump disables when both ports are in RS-485 mode, thereby saving power, minimizing noise, and eliminating the charge pump capacitors. Both RS-232 and RS-485 modes feature loopback and shutdown functions. Loopback internally connects the Tx outputs to the corresponding Rx input, to facilitate board level self test implementation. The outputs remain connected to the loads during loopback, so connection problems (e.g., shorted connectors or cables) can be detected. Shutdown mode disables the Tx and Rx outputs, disables the charge pumps, and places the IC in a low current (35µA) mode. The ISL3333 is a QFN packaged device that includes two additional user selectable, lower speed and edge rate options for EMI sensitive designs, or to allow longer bus lengths. It also features a logic supply pin (VL) that sets the VOH level of logic outputs, and the switching points of logic inputs, to be compatible with another supply voltage in mixed voltage systems. The QFN also adds RS-232 mode Tx EN pins (DEN), and active low Rx enable pins (RXEN) to increase design flexibility. In RS-485 applications, active low Rx enable pins allow Tx/Rx direction control, via a single signal per port, by connecting the corresponding DE and RXEN pins together. For a single port version of these devices, please see the ISL3330, ISL3331 data sheet. Features • ±15kV (HBM) ESD Protected Bus Pins (RS-232 or RS-485) • Operates From a Single 3.3V Supply • Two Independent Ports, Each User Selectable for RS-232 (2 Transceivers) or RS-485/RS-422 (1 Transceiver) • True Flow-Through Pinouts Simplify Board Layouts • Pb-free (RoHS compliant) • Full Failsafe (Open/Short) Rx in RS-485/422 Mode • Loopback Mode Facilitates Board Self Test Functions • User Selectable RS-485 Data Rates (ISL3333 Only) - Fast Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Mbps - Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 460kbps - Slew Rate Limited. . . . . . . . . . . . . . . . . . . . . . . 115kbps • Fast RS-232 Data Rate . . . . . . . . . . . . . . . Up to 400kbps • RS-232 Tx and Rx Enable Pins (ISL3333 Only) • Small Charge Pump Caps . . . . . . . . . . . . . . . . . 4 x 0.1µF • Low Current Shutdown Mode. . . . . . . . . . . . . . . . . . .35µA • QFN Package Saves Board Space (ISL3333 Only) • Logic Supply Pin (VL) Eases Operation in Mixed Supply Systems (ISL3333 Only) Applications • Gaming Applications (e.g., Slot Machines) • Single Board Computers • Factory Automation • Security Networks • Industrial/Process Control Networks • Level Translators (e.g., RS-232 to RS-422) • Point of Sale Equipment • Dual Channel RS-485 Interfaces TABLE 1. SUMMARY OF FEATURES NO. OF PART NUMBER PORTS PACKAGE OPTIONS ISL3332 ISL3333 2 2 28 Ld SSOP RS-485 DATA RATE (bps) 20M RS-232 DATA RATE (kbps) VL PIN? 400 400 NO YES RS-232 Tx ENABLE? NO YES ACTIVE H or L LOW POWER Rx ENABLE? SHUTDOWN? NONE L YES YES 40 Ld QFN (6 x 6mm) 20M, 460k, 115k 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2008. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. ISL3332, ISL3333 Ordering Information PART NUMBER (NOTE) ISL3332IAZ* ISL3333IRZ* PART MARKING 3332 IAZ 3333 IRZ TEMP. RANGE (°C) -40 to +85 -40 to +85 PACKAGE (Pb-Free) 28 Ld SSOP 40 Ld QFN PKG. DWG. # M28.209 L40.6x6 *Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. Pinouts ISL3332 (28 LD SSOP) TOP VIEW C1NC NC C1+ 1 C1- 2 V+ 3 A1 4 B1 5 Y1 6 Z1 7 SEL1 8 SEL2 9 Z2 10 Y2 11 B2 12 A2 13 GND 14 28 C2+ 27 C226 VCC 25 RB1 24 RA1 23 DZ1/DE1 22 DY1 21 LB 20 ON/OFF 19 DY2 18 DZ2/DE2 17 RA2 16 RB2 15 VY2 B2 V+ A1 B1 Y1 Z1 SEL1 SEL2 Z2 1 2 3 4 5 6 7 8 9 10 11 A2 12 DEN1 13 SPA 14 SPB 15 GND 16 GND 17 RXEN1 18 RXEN2 19 V20 DEN2 40 39 38 37 36 35 34 33 32 31 30 RB1 29 RA1 28 DZ1/DE1 27 DY1 26 LB 25 ON/OFF 24 DY2 23 DZ2/DE2 22 RA2 21 RB2 ISL3333 (40 LD QFN) TOP VIEW VCC C1+ C2+ C2NC NC VL 2 FN6362.0 May 27, 2008 ISL3332, ISL3333 TABLE 2. ISL3332 FUNCTION TABLE INPUTS SEL1 or 2 0 X 1 1 NOTE: 1. Charge pumps are off if SEL1 = SEL2 = 1, or if ON/OFF = 0. If ON = 1, and either port is programmed for RS-232 mode, then the charge pumps are on. ON/OFF 1 0 1 1 DE 1 or 2 N.A. X 0 1 RECEIVER OUTPUTS RA ON High-Z ON ON RB ON High-Z High-Z * High-Z * DRIVER OUTPUTS Y ON High-Z High-Z ON Z ON High-Z High-Z ON CHARGE PUMPS (NOTE 1) ON OFF OFF OFF MODE RS-232 Shutdown RS-485 RS-485 ISL3332 Truth Tables (FOR EACH PORT) RS-232 TRANSMITTING MODE INPUTS SEL1 or 2 ON/OFF 0 0 0 0 0 1 1 1 1 0 DY 0 0 1 1 X DZ 0 1 0 1 X OUTPUTS Y 1 1 0 0 High-Z Z 1 0 1 0 High-Z RS-485 RECEIVING MODE OUTPUT A 0 0 1 1 Open X B 0 1 0 1 Open X RA 1 1 0 0 1 High-Z RB 1 0 1 0 1 High-Z INPUTS SEL1 or 2 ON/OFF 1 1 1 1 1 1 1 0 B-A ≥ -40mV ≤ -200mV Open or Shorted together X OUTPUT RA 1 0 1 High-Z RB * High-Z High-Z High-Z High-Z RS-485 TRANSMITTING MODE INPUTS SEL1 or 2 ON/OFF 1 1 1 1 1 1 1 0 DE1 or 2 1 1 0 X DY 0 1 X X OUTPUTS Y 1 0 High-Z High-Z Z 0 1 High-Z High-Z RS-232 RECEIVING MODE INPUTS SEL1 or 2 ON/OFF 0 0 0 0 0 0 1 1 1 1 1 0 * Internally pulled high through a 40kΩ resistor. 3 FN6362.0 May 27, 2008 ISL3332, ISL3333 TABLE 3. ISL3333 FUNCTION TABLE INPUTS SEL1 or 2 ON/OFF 0 0 0 0 X 1 1 1 1 1 1 1 1 1 1 NOTE: 2. Charge pumps are off if SEL1 = SEL2 = 1, or if ON/OFF = 0. If ON = 1, and either port is programmed for RS-232 mode, then the charge pumps are on. 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 SPA X X X X X X 0 0 1 1 X 0 0 1 1 SPB X X X X X X 0 1 0 1 X 0 1 0 1 RXEN 1 or 2 0 0 1 1 X 0 0 0 0 0 1 1 1 1 1 DEN 1 or 2 DE 1 or 2 0 1 0 1 X N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. N.A. X 0 1 1 1 1 0 1 1 1 1 RECEIVER OUTPUTS RA ON ON High-Z High-Z High-Z ON ON ON ON ON RB ON ON High-Z High-Z High-Z DRIVER OUTPUTS Y High-Z ON High-Z ON High-Z Z High-Z ON High-Z ON High-Z High-Z ON ON ON ON High-Z ON ON ON ON DRIVER CHARGE DATA RATE PUMPS (NOTE 2) (Mbps) ON ON ON ON OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF 0.46 0.46 0.46 0.46 N.A. N.A. 0.46 0.115 20 20 N.A. 0.46 0.115 20 20 MODE RS-232 RS-232 RS-232 RS-232 Shutdown RS-485 RS-485 RS-485 RS-485 RS-485 RS-485 RS-485 RS-485 RS-485 RS-485 High-Z * High-Z High-Z * High-Z * High-Z * High-Z * ON ON ON ON High-Z High-Z * High-Z High-Z High-Z * High-Z High-Z * High-Z High-Z * High-Z High-Z * ON ON ON ON ISL3333 Truth Tables (FOR EACH PORT) RS-232 TRANSMITTING MODE INPUTS SEL1 or 2 ON/OFF DEN1 or 2 0 0 0 0 0 0 1 1 1 1 1 0 1 1 1 1 0 X DY 0 0 1 1 X X DZ 0 1 0 1 X X OUTPUTS Y 1 1 0 0 Z 1 0 1 0 1 1 1 1 1 0 RS-485 TRANSMITTING MODE INPUTS SEL1 ON/ DE or 2 OFF 1 or 2 SPA SPB 1 1 1 1 1 1 1 0 X 0 0 1 X X 0 1 X X X DY 0/1 0/1 0/1 X X OUTPUTS Y 1/0 1/0 1/0 Z 0/1 0/1 0/1 DATA RATE Mbps 0.46 0.115 20 N.A. N.A. High-Z High-Z High-Z High-Z High-Z High-Z High-Z High-Z RS-232 RECEIVING MODE INPUTS RXEN 1 or 2 SEL1 or 2 ON/OFF 0 0 0 0 0 0 0 1 1 1 1 1 1 0 0 0 0 0 0 1 X A 0 0 1 1 Open X X B 0 1 0 1 Open X X OUTPUT RA 1 1 0 0 1 RB 1 0 1 0 1 1 1 1 0 SEL1 or 2 1 1 1 RS-485 RECEIVING MODE INPUTS ON/OFF 1 1 1 RXEN 1 or 2 0 0 0 1 X B-A ≥ -40mV ≤ -200mV Open or Shorted together X X OUTPUT RA 1 0 1 RB * High-Z High-Z High-Z High-Z High-Z High-Z High-Z High-Z High-Z High-Z High-Z * Internally pulled high through a 40kΩ resistor. 4 FN6362.0 May 27, 2008 ISL3332, ISL3333 Pin Descriptions PIN GND LB NC ON/OFF RXEN SEL VCC VL DEN A MODE BOTH BOTH BOTH BOTH BOTH BOTH BOTH BOTH Ground connection. Enables loopback mode when low. Internally pulled-high. No Connection. If either port is in RS-232 mode, a low on ON/OFF disables the charge pumps. In either mode, a low disables all the outputs, and places the device in low power shutdown. Internally pulled-high. ON = 1 for normal operation. Active low receiver output enable. The corresponding port’s Rx is enabled when RXEN is low; Rx is high impedance when RXEN is high. Internally pulled low. (QFN only) Interface Mode Select input. High puts corresponding port in RS-485 Mode, while a low puts it in RS-232 Mode. System power supply input (3.3V). Logic-Level Supply. All TTL/CMOS inputs and outputs are powered by this supply. QFN logic input pins that are externally tied high in an application, should use the VL supply for the high voltage level. (QFN only) FUNCTION RS-232 Active high driver output enable. The corresponding port’s 232 mode drivers are enabled when DEN is high; drivers are disabled when DEN is low. Internally pulled high. (QFN only). RS-232 Receiver input with ±15kV ESD protection. A low on A forces RA high; A high on A forces RA low. RS-485 Inverting receiver input with ±15kV ESD protection. B RS-232 Receiver input with ±15kV ESD protection. A low on B forces RB high; A high on B forces RB low. RS-485 Noninverting receiver input with ±15kV ESD protection. DY RS-232 Driver input. A low on DY forces output Y high. Similarly, a high on DY forces output Y low. RS-485 Driver input. A low on DY forces output Y high and output Z low. Similarly, a high on DY forces output Y low and output Z high. D Z / DE RS-232 Driver input. A low on DZ forces output Z high. Similarly, a high on DZ forces output Z low. RS-485 Driver output enable (DE). The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low. Internally pulled high when port selected for RS-485 mode. RA RS-232 Receiver output. RS-485 Receiver output: If B > A by at least -40mV, RA is high; If B < A by -200mV or more, RA is low; RA = High if A and B are unconnected (floating) or shorted together (i.e., full fail-safe). RB RS-232 Receiver output. RS-485 Not used. Internally pulled-high, and unaffected by RXEN. Y RS-232 Driver output with ±15kV ESD protection. RS-485 Inverting driver output with ±15kV ESD protection. Z RS-232 Driver output with ±15kV ESD protection. RS-485 Noninverting driver output with ±15kV ESD protection. SP C1+ C1C2+ C2V+ V- RS-485 Speed control. Internally pulled-high. (QFN only) RS-232 External capacitor (voltage doubler) is connected to this lead. Not needed if both ports in RS-485 Mode. RS-232 External capacitor (voltage doubler) is connected to this lead. Not needed if both ports in RS-485 Mode. RS-232 External capacitor (voltage inverter) is connected to this lead. Not needed if both ports in RS-485 Mode. RS-232 External capacitor (voltage inverter) is connected to this lead. Not needed if both ports in RS-485 Mode. RS-232 Internally generated positive RS-232 transmitter supply (+5.5V). C3 not needed if both ports in RS-485 Mode. RS-232 Internally generated negative RS-232 transmitter supply (-5.5V). C4 not needed if both ports in RS-485 Mode. 5 FN6362.0 May 27, 2008 ISL3332, ISL3333 Typical Operating Circuits RS-232 MODE WITHOUT LOOPBACK +3.3V + +3.3V 0.1μF 1 + 2 28 + 27 C1+ C1C2+ C2V- 15 26 VCC V+ 3 + C3 0.1µF C4 0.1µF + RA1 C1 0.1µF C2 0.1µF + 2 28 + 27 4 5kΩ B1 5 5kΩ R LB Rx Y1 6 D 22 DY1 DZ1 GND VCC 25 + RS-232 MODE WITH LOOPBACK 0.1µF 1 C1+ C1C2+ C2R 24 RA1 26 VCC V+ 3 + C3 0.1µF C4 0.1µF + C1 0.1µF C2 0.1µF V- 15 A1 4 5kΩ 5 5kΩ R 24 A1 B1 R 25 RB1 RXEN1 (QFN ONLY) 22 RB1 Y1 6 D DY1 DZ1 VCC VCC Z1 VCC 7 DEN1 (QFN ONLY) 8 SEL1 GND D LB ON/OFF 14 23 21 20 Z1 VCC 7 DEN1 (QFN ONLY) 8 SEL1 GND D LB ON/OFF 14 23 21 20 NOTE: PINOUT FOR SSOP SAME FOR PORT 2. NOTE: PINOUT FOR SSOP SAME FOR PORT 2. RS-485 MODE WITHOUT LOOPBACK +3.3V + 0.1µF 1 + 2 28 + 27 4 5 R 24 C1+ C1C2+ C226 VCC V+ 3 + C3 0.1µF C4 0.1µF + RA1 C1 0.1µF C2 0.1µF RS-485 MODE WITH LOOPBACK +3.3V + 0.1µF 1 C1+ C1C2+ C2- 26 VCC V+ 3 + C3 0.1µF C4 0.1µF + RA1 C1 0.1µF C2 0.1µF + 2 28 + 27 4 5 V- 15 V- 15 A1 B1 A1 B1 R 24 RXEN1 (QFN ONLY) 6 7 D 25 22 RB1 DY1 Y1 Z1 25 6 22 7 D RB1 DY1 LB Rx Y1 Z1 23 VCC VCC 8 DE1 LB SEL1 GND 14 ON/OFF 21 VCC 20 VCC 23 VCC VCC 8 DE1 LB SEL1 GND 14 ON/OFF 21 GND 20 VCC NOTE: PINOUT FOR SSOP SAME FOR PORT 2. NOTE: PINOUT FOR SSOP SAME FOR PORT 2. 6 FN6362.0 May 27, 2008 ISL3332, ISL3333 Absolute Maximum Ratings (TA = +25°C) VCC to Ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V VL (QFN Only) . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to VCC + 0.5V Input Voltages All Except A,B. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V Input/Output Voltages A, B (Any Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . -25V to +25V Y, Z (Any Mode, Note 3) . . . . . . . . . . . . . . . . . . . -12.5V to +12.5V RA, RB (non-QFN Package). . . . . . . . . . . . -0.5V to (VCC + 0.5V) RA, RB (QFN Package) . . . . . . . . . . . . . . . . -0.5V to (VL + 0.5V) Output Short Circuit Duration Y, Z, RA, RB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . See Specification Table Thermal Information Thermal Resistance (Typical) θJA (°C/W) θJC (°C/W) 28 Ld SSOP Package (Note 5) . . . . . . 60 N/A 40 Ld QFN Package (Notes 4, 6). . . . . 31 2.5 Maximum Junction Temperature (Plastic Package) . . . . . . . +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp Operating Conditions Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty. NOTES: 3. One output at a time, IOUT ≤ 100mA for ≤ 10 mins. 4. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See Tech Brief TB379. 5. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 6. For θJC, the “case temp” location is the center of the exposed metal pad on the package underside. Electrical Specifications Test Conditions: VCC = 3.15V to 3.45V, C1 - C4 = 0.1µF, VL = VCC (for QFN only); Unless Otherwise Specified. Typicals are at VCC = 3.3V, TA =+25°C (Note 7) SYMBOL TEST CONDITIONS TEMP MIN (°C) (Note 11) TYP MAX (Note 11) UNITS PARAMETER DC CHARACTERISTICS - RS-485 DRIVER (SEL = VCC) Driver Differential VOUT (no load) Driver Differential VOUT (with load) VOD1 VOD2 VOD3 Change in Magnitude of Driver Differential VOUT for Complementary Output States Driver Common-Mode VOUT Change in Magnitude of Driver Common-Mode VOUT for Complementary Output States Driver Short-Circuit Current, VOUT = High or Low Driver Three-State Output Leakage Current (Y, Z) ΔVOD R = 50Ω (RS-422) (Figure 1) R = 27Ω (RS-485) (Figure 1) RD = 60Ω, R = 375Ω, VCM = -7V to 12V (Figure 1) R = 27Ω or 50Ω (Figure 1) Full Full Full Full Full 2 1.5 1.5 2.3 2 0.01 VCC 5 5 0.2 V V V V V VOC ΔVOC R = 27Ω or 50Ω (Figure 1) R = 27Ω or 50Ω (Figure 1) Full Full - 0.01 3.0 0.2 V V IOS IOZ -7V ≤ (VY or VZ) ≤ 12V (Note 8) Outputs Disabled, VCC = 0V or 3.6V VOUT = 12V VOUT = -7V Full Full Full 35 -200 - 250 200 - mA µA µA DC CHARACTERISTICS - RS-232 DRIVER (SEL = GND) Driver Output Voltage Swing Driver Output Short-Circuit Current VO IOS VIH1 VIH2 VIH3 VIH4 VIH5 All TOUTS Loaded with 3kΩ to Ground VOUT = 0V VL = VCC if QFN 2.7V ≤ VL < 3.0V (QFN Only) 2.3V ≤ VL < 2.7V (QFN Only) 1.6V ≤ VL < 2.3V (QFN Only) 1.2V ≤ VL < 1.6V (QFN Only) Full Full ±5.0 -60 60 V mA DC CHARACTERISTICS - LOGIC PINS (i.e., DRIVER AND CONTROL INPUT PINS) Input High Voltage Full Full Full Full 25 2.2 2 1.6 0.7*VL 0.7*VL V V V V V 7 FN6362.0 May 27, 2008 ISL3332, ISL3333 Electrical Specifications Test Conditions: VCC = 3.15V to 3.45V, C1 - C4 = 0.1µF, VL = VCC (for QFN only); Unless Otherwise Specified. Typicals are at VCC = 3.3V, TA =+25°C (Note 7) (Continued) SYMBOL VIL1 VIL2 VIL3 VIL4 VIL5 VIL6 Input Current IIN1 IIN2 Receiver Differential Threshold Voltage Receiver Input Hysteresis Receiver Input Current (A, B) VTH ΔVTH IIN RIN TEST CONDITIONS VL = VCC if QFN VL ≥ 2.7V (QFN Only) 2.3V ≤ VL < 2.7V (QFN Only) 1.6V ≤ VL < 2.3V (QFN Only) 1.3V ≤ VL < 1.6V (QFN Only) 1.2V ≤ VL < 1.3V (QFN Only) Pins Without Pull-ups or Pull-downs LB, ON/OFF, DE (SP, RXEN, DEN, if QFN) -7V ≤ VCM ≤ 12V, Full Failsafe VCM = 0V VCC = 0V or 3.0 to 3.6V VIN = 12V VIN = -7V Receiver Input Resistance -7V ≤ VCM ≤ 12V, VCC = 0 (Note 9) or 3.0V ≤ VCC ≤ 3.6V TEMP MIN (°C) (Note 11) Full Full Full Full 25 25 Full Full -2 -25 TYP 0.35*VL 0.25*VL MAX (Note 11) UNITS 0.8 0.8 0.7 0.35*VL 2 25 V V V V V V µA µA PARAMETER Input Low Voltage DC CHARACTERISTICS - RS-485 RECEIVER INPUTS (SEL = VCC) Full 25 Full Full Full -0.2 -0.64 15 35 -0.04 0.8 V mV mA mA kΩ DC CHARACTERISTICS - RS-232 RECEIVER INPUTS (SEL = GND) Receiver Input Voltage Range Receiver Input Threshold Receiver Input Hysteresis Receiver Input Resistance VIN VIL VIH ΔVTH RIN VOH1 VOH2 VOH3 VOH4 Receiver Output Low Voltage Receiver Short-Circuit Current Receiver Three-State Output Current Unused Receiver (RB) Pull-Up Resistance VOL IOSR IOZR ROBZ VIN = ±15V, VCC Powered Up (Note 9) IO = -1.5mA (VL = VCC if QFN) IO = -100µA, VL ≥ 1.2V (QFN Only) IO = -500µA, VL = 1.5V (QFN Only) IO = -150µA, VL = 1.2V (QFN Only) IO = 5mA 0V ≤ VO ≤ VCC Output Disabled, 0V ≤ VO ≤ VCC (or VL for QFN) ON/OFF = VCC, SELX = VCC (RS-485 Mode) Full Full Full 25 Full -25 2.4 3 1.1 1.6 0.5 5 25 0.8 7 V V V V kΩ DC CHARACTERISTICS - RECEIVER OUTPUTS (485 OR 232 MODE) Receiver Output High Voltage Full Full Full Full Full Full Full 25 VCC-0.4 VL-0.1 1.2 1.0 7 0.2 40 0.4 85 ±10 V V V V V mA µA kΩ POWER SUPPLY CHARACTERISTICS No-Load Supply Current, (Note 7) ICC232 ICC485 Shutdown Supply Current SEL1 or SEL2 = GND, LB = ON/OFF = VCC SEL 1 & 2 = LB = DE = ON/OFF = VCC Full Full Full Full Full 3.7 1.6 45 35 60 7 5 100 80 160 mA mA µA µA µA ISHDN232 ON/OFF = SELX = GND, LB = VCC, (SPX = VL, DENX = GND if QFN) ISHDN485 ON/OFF = DEX = GND, SELX = LB = VCC, (SPX = GND, DENX = VL if QFN) SSOP QFN ESD CHARACTERISTICS Bus Pins (A, B, Y, Z) Any Mode All Other Pins Human Body Model Human Body Model Machine Model 25 25 25 ±15 ±2.5 ±200 kV kV V 8 FN6362.0 May 27, 2008 ISL3332, ISL3333 Electrical Specifications Test Conditions: VCC = 3.15V to 3.45V, C1 - C4 = 0.1µF, VL = VCC (for QFN only); Unless Otherwise Specified. Typicals are at VCC = 3.3V, TA =+25°C (Note 7) (Continued) SYMBOL TEST CONDITIONS RL = 3kΩ, Measured From 3V to -3V or -3V to 3V CL ≥ 15pF CL ≤ 2500pF TEMP MIN (°C) (Note 11) TYP MAX (Note 11) UNITS PARAMETER Driver Output Transition Region Slew Rate Driver Output Transition Time Driver Propagation Delay Driver Propagation Delay Skew Driver Enable Time (QFN Only) Driver Disable Time (QFN Only) Driver Enable Time from Shutdown Driver Maximum Data Rate Receiver Propagation Delay RS-232 DRIVER AND RECEIVER SWITCHING CHARACTERISTICS (SEL = GND, ALL VERSIONS AND SPEEDS) SR Full Full Full Full Full tDPHL - tDPLH (Figure 6) CL = 1000pF RL = 5kΩ, Measured at VOUT = ±3V, CL = 30pF VOUT = ±3.0V, CL = 1000pF RL = 3kΩ, CL = 500pF, One Transmitter Switching on Each Port CL = 15pF (Figure 7) tRPHL - tRPLH (Figure 7) CL = 15pF QFN Only, CL = 15pF, SW = VCC QFN Only, CL = 15pF, SW = GND QFN Only, CL = 15pF, SW = VCC QFN Only, CL = 15pF, SW = GND CL = 15pF, SW = VCC CL = 15pF, SW = GND Full 25 25 25 Full Full Full Full Full Full Full Full Full 25 25 4 0.22 250 0.46 20 9 1.2 1 1.2 300 1500 500 25 400 40 58 18 2 18 18 22 22 60 20 30 3.1 2 2 450 120 120 40 V/µs V/µs µs µs µs ns ns ns µs kbps ns ns ns Mbps ns ns ns ns ns ns tr, tf tDPHL tDPLH tDSKEW tDEN tDDIS tDENSD DRD tRPHL tRPLH tRSKEW DRR tZL tZH tLZ tHZ tZLSHDN tZHSHDN RL = 3kΩ, CL = 2500pF, 10% - 90% RL = 3kΩ, CL = 1000pF (Figure 6) Receiver Propagation Delay Skew Receiver Maximum Data Rate Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Output Low Receiver Disable from Output High Receiver Enable from Shutdown to Output Low Receiver Enable from Shutdown to Output High RS-485 DRIVER SWITCHING CHARACTERISTICS (FAST DATA RATE (20Mbps), SEL = VCC, ALL VERSIONS (SPA = VCC if QFN)) Driver Differential Input to Output Delay Driver Output Skew Driver Differential Rise or Fall Time Driver Enable to Output Low Driver Enable to Output High Driver Disable from Output Low Driver Disable from Output High Driver Enable from Shutdown to Output Low Driver Enable from Shutdown to Output High Driver Maximum Data Rate tDLH, tDHL RDIFF = 54Ω, CL = 100pF (Figure 2) tSKEW tR, tF tZL tZH tLZ tHZ RDIFF = 54Ω, CL = 100pF (Figure 2) RDIFF = 54Ω, CL = 100pF, (Figure 2) CL = 100pF, SW = VCC (Figure 3) CL = 100pF, SW = GND (Figure 3) CL = 15pF, SW = VCC (Figure 3) CL = 15pF, SW = GND (Figure 3) Full Full Full Full Full Full Full Full Full Full 10 3 20 20 2 20 28 35 30 30 100 290 35 35 10 30 60 60 60 60 250 375 ns ns ns ns ns ns ns ns ns Mbps tZL(SHDN) RL = 500Ω, CL = 100pF, SW = VCC (Figure 3) tZH(SHDN) RL = 500Ω, CL = 100pF, SW = GND (Figure 3) fMAX RDIFF = 54Ω, CL = 100pF (Figure 2) RS-485 DRIVER SWITCHING CHARACTERISTICS (MEDIUM DATA RATE (460kbps, QFN ONLY), SEL = VCC, SPA = SPB= GND) Driver Differential Input to Output Delay Driver Output Skew Driver Differential Rise or Fall Time Driver Enable to Output Low tDLH, tDHL RDIFF = 54Ω, CL = 100pF (Figure 2) tSKEW tR, tF tZL RDIFF = 54Ω, CL = 100pF (Figure 2) RDIFF = 54Ω, CL = 100pF (Figure 2) CL = 100pF, SW = VCC (Figure 3) Full Full Full Full 200 300 500 10 660 42 1000 150 1100 100 ns ns ns ns 9 FN6362.0 May 27, 2008 ISL3332, ISL3333 Electrical Specifications Test Conditions: VCC = 3.15V to 3.45V, C1 - C4 = 0.1µF, VL = VCC (for QFN only); Unless Otherwise Specified. Typicals are at VCC = 3.3V, TA =+25°C (Note 7) (Continued) SYMBOL tZH tLZ tHZ TEST CONDITIONS CL = 100pF, SW = GND (Figure 3) CL = 15pF, SW = VCC (Figure 3) CL = 15pF, SW = GND (Figure 3) TEMP MIN (°C) (Note 11) Full Full Full Full Full Full 460 TYP 350 30 30 2000 MAX (Note 11) UNITS 450 60 60 500 750 ns ns ns ns ns kbps PARAMETER Driver Enable to Output High Driver Disable from Output Low Driver Disable from Output High Driver Enable from Shutdown to Output Low Driver Enable from Shutdown to Output High Driver Maximum Data Rate tZL(SHDN) RL = 500Ω, CL = 100pF, SW = VCC (Figure 3) tZH(SHDN) RL = 500Ω, CL = 100pF, SW = GND (Figure 3) fMAX RDIFF = 54Ω, CL = 100pF (Figure 2) RS-485 DRIVER SWITCHING CHARACTERISTICS (SLOW DATA RATE (115kbps, QFN ONLY), SEL = VCC, SPA = GND, SPB= VCC) Driver Differential Input to Output Delay Driver Output Skew Driver Differential Rise or Fall Time Driver Enable to Output Low Driver Enable to Output High Driver Disable from Output Low Driver Disable from Output High Driver Enable from Shutdown to Output Low Driver Enable from Shutdown to Output High Driver Maximum Data Rate tDLH, tDHL RDIFF = 54Ω, CL = 100pF (Figure2) tSKEW tR, tF tZL tZH tLZ tHZ RDIFF = 54Ω, CL = 100pF (Figure2) RDIFF = 54Ω, CL = 100pF (Figure 2) CL = 100pF, SW = VCC (Figure 3) CL = 100pF, SW = GND (Figure 3) CL = 15pF, SW = VCC (Figure 3) CL = 15pF, SW = GND (Figure 3) Full Full Full Full Full Full Full Full Full Full 800 1000 115 1600 250 1700 45 900 35 25 800 2500 500 3100 100 1200 60 60 800 1500 ns ns ns ns ns ns ns ns ns kbps tZL(SHDN) RL = 500Ω, CL = 100pF, SW = VCC (Figure 3) tZH(SHDN) RL = 500Ω, CL = 100pF, SW = GND (Figure 3) fMAX RDIFF = 54Ω, CL = 100pF (Figure 2) RS-485 RECEIVER SWITCHING CHARACTERISTICS (SEL = VCC, ALL VERSIONS AND SPEEDS) Receiver Input to Output Delay Receiver Skew | tPLH - tPHL | Receiver Maximum Data Rate Receiver Enable to Output Low Receiver Enable to Output High Receiver Disable from Output Low Receiver Disable from Output High Receiver Enable from Shutdown to Output Low Receiver Enable from Shutdown to Output High NOTES: 7. 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. 8. Supply current specification is valid for loaded drivers when DE = 0V (RS-485 mode) or DEN = 0V (RS-232 mode). 9. Applies to peak current. See “Typical Performance Curves” for more information. 10. RIN defaults to RS-485 mode (>15kΩ) when the device is unpowered (VCC = 0V), or in SHDN, regardless of the state of the SEL inputs. 11. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. tPLH, tPHL (Figure 4) tSKEW fMAX tZL tZH tLZ tHZ tZLSHDN tZHSHDN QFN Only, CL = 15pF, SW = VCC (Figure 5) QFN Only, CL = 15pF, SW = GND (Figure5) QFN Only, CL = 15pF, SW = VCC (Figure 5) QFN Only, CL = 15pF, SW = GND (Figure 5) CL = 15pF, SW = VCC (Figure 5) CL = 15pF, SW = GND (Figure 5) (Figure 4) Full Full Full Full Full Full Full Full Full 20 20 45 3 40 20 20 20 20 500 500 70 10 60 60 60 60 900 900 ns ns Mbps ns ns ns ns ns ns 10 FN6362.0 May 27, 2008 ISL3332, ISL3333 Test Circuits and Waveforms R VCC DE DY Y D Z R VOC RD VOD FIGURE 1. RS-485 DRIVER VOD AND VOC TEST CIRCUIT 3V DY CL = 100pF Y D Z SIGNAL GENERATOR OUT (Y) tDLH DIFF OUT (Z - Y) tR SKEW = |tPLH (Y or Z) - tPHL (Z or Y)| 90% 10% 0V RDIFF CL = 100pF tPHL 50% tDHL 0V 90% 10% tF +VOD -VOD tPLH VOH 50% VOL OUT (Z) 50% 50% VOL 1.5V 1.5V 0V tPLH tPHL VOH VCC DE DY FIGURE 2A. TEST CIRCUIT FIGURE 2B. MEASUREMENT POINTS FIGURE 2. RS-485 DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES 11 FN6362.0 May 27, 2008 ISL3332, ISL3333 Test Circuits and Waveforms (Continued) DE DY SIGNAL GENERATOR Y D Z CL tZH(SHDN) FOR SHDN TESTS, SWITCH ON/OFF RATHER THAN DE OUT (Y, Z) tZH OUTPUT HIGH 2.3V tHZ VOH - 0.5V VOH 0V tZL tZL(SHDN) OUT (Y, Z) 2.3V OUTPUT LOW tLZ VCC VOL + 0.5V V OL 500Ω SW VCC GND ENABLED DE (ON/OFF FOR SHDN) 1.5V 1.5V 0V 3V PARAMETER tHZ tLZ tZH tZL tZH(SHDN) tZL(SHDN) ON/DE 1/1/1/1/-/1 -/1 OUTPUT Y/Z Y/Z Y/Z Y/Z Y/Z Y/Z DY 0/1 1/0 0/1 1/0 0/1 1/0 SW GND VCC GND VCC GND VCC CL (pF) 15 15 100 100 100 100 FIGURE 3B. MEASUREMENT POINTS FIGURE 3A. TEST CIRCUIT FIGURE 3. RS-485 DRIVER ENABLE AND DISABLE TIMES RXEN (QFN ONLY) 0V A B R 15pF RA B 0V tPLH 0V +1.5V -1.5V tPHL VCC RA 1.5V 1.5V 0V SIGNAL GENERATOR FIGURE 4A. TEST CIRCUIT FIGURE 4B. MEASUREMENT POINTS FIGURE 4. RS-485 RECEIVER PROPAGATION DELAY RXEN (QFN ONLY) A R SIGNAL GENERATOR B RA 1kΩ SW 15pF VCC GND ON/OFF (FOR SHDN TESTS) 3V 1.5V ENABLED 0V 3V 1.5V 0V RXEN (QFN ONLY) 1.5V FOR SHDN TESTS, SWITCH ON/OFF RATHER THAN RXEN tZH tZH(SHDN) OUTPUT HIGH 1.5V tHZ VOH - 0.5V VOH 0V PARAMETER tHZ (QFN Only) tLZ (QFN Only) tZH (QFN Only) tZL (QFN Only) tZH(SHDN) tZL(SHDN) ON/RXEN 1/1/1/1/-/0 -/0 B +1.5V -1.5V +1.5V -1.5V +1.5V -1.5V SW GND VCC GND VCC GND VCC tZL tZL(SHDN) RA 1.5V OUTPUT LOW tLZ RA VCC VOL + 0.5V V OL FIGURE 5A. TEST CIRCUIT FIGURE 5B. MEASUREMENT POINTS FIGURE 5. RS-485 RECEIVER ENABLE AND DISABLE TIMES 12 FN6362.0 May 27, 2008 ISL3332, ISL3333 Test Circuits and Waveforms (Continued) VCC DEN (QFN ONLY) DY,Z Y, Z CL tDPHL RL OUT (Y,Z) 0V 0V VOSKEW = |tDPHL - tDPLH| 3V DY,Z 1.5V 1.5V 0V tDPLH VO+ D SIGNAL GENERATOR FIGURE 6A. TEST CIRCUIT FIGURE 6B. MEASUREMENT POINTS FIGURE 6. RS-232 DRIVER PROPAGATION DELAY AND TRANSITION TIMES RXEN (QFN ONLY) A, B RA, RB CL = 15pF 3V A, B 50% 50% 0V tRPHL RA, RB SKEW = |tRPHL - tRPLH| tRPLH VOH 50% 50% VOL R SIGNAL GENERATOR FIGURE 7A. TEST CIRCUIT FIGURE 7B. MEASUREMENT POINTS FIGURE 7. RS-232 RECEIVER PROPAGATION DELAY AND TRANSITION TIMES 13 FN6362.0 May 27, 2008 ISL3332, ISL3333 Typical Application RS-232 to RS-485 Converter The ISL3332, ISL3333 are ideal for implementing a single IC 2-wire (Tx Data, Rx Data) protocol converter, because each port can be programmed for a different protocol. Figure 8 illustrates the simple connections to create a single transceiver RS-232 to RS-485 converter. Depending on the RS-232 data rate, using an RS-422 bus as an RS-232 “extension cord” can extend the transmission distance up to 4000’ (1220m). A similar circuit on the other end of the cable completes the conversion to/from RS-232. +3.3V C1 0.1µF C2 0.1µF + 0.1µF 2 C128 C2+ + 27 C24 A1 5kΩ 5 B1 5kΩ 6 Y1 7 Z1 8 VCC 9 SEL1 SEL2 ON/OFF 20 VCC + 1 C1+ 26 VCC V+ 3 +C3 0.1µF C4 0.1µF + Detailed Description Each of the two ISL333X ports supports dual protocols: RS-485/422, and RS-232. RS-485 and RS-422 are differential (balanced) data transmission standards for use in high speed (up to 20Mbps) networks, or long haul and noisy environments. The differential signaling, coupled with RS-485’s requirement for an extended common mode range (CMR) of +12V to -7V make these transceivers extremely tolerant of ground potential differences, as well as voltages induced in the cable by external fields. Both of these effects are real concerns when communicating over the RS-485/422 maximum distance of 4000’ (1220m). It is important to note that the ISL333X don’t follow the RS-485 convention whereby the inverting I/O is labeled “B/Z”, and the non inverting I/O is “A/Y”. Thus, in the application diagrams below the 333X A/Y (B/Z) pins connect to the B/Z (A/Y) pins of the generic RS-485/RS-422 ICs. RS-422 is typically a point-to-point (one driver talking to one receiver on a bus), or a point-to-multipoint (multidrop) standard that allows only one driver and up to 10 receivers on each bus. Because of the one driver per bus limitation, RS-422 networks use a two bus, full duplex structure for bidirectional communication, and the Rx inputs and Tx outputs (no tri-state required) connect to different busses, as shown in Figure 10. Conversely, RS-485 is a true multipoint standard, which allows up to 32 devices (any combination of drivers- must be tri-statable - and receivers) on each bus. Now bidirectional communication takes place on a single bus, so the Rx inputs and Tx outputs of a port connect to the same bus lines, as shown in Figure 9. Each port set to RS-485 /422 mode includes one Rx and one Tx.RS-232 is a point-to-point, singled ended (signal voltages referenced to GND) communication protocol targeting fairly short (