Fault Protected, Extended Common Mode Range, RS-485/RS-422 Transceivers with ±16.5kV ESD ISL32470E, ISL32472E, ISL32475E, ISL32478E The ISL32470E, ISL32472E, ISL32475E, ISL32478E are Features fault-protected, extended common mode range differential transceivers that exceed the RS-485 and RS-422 standards for balanced communication. The RS-485 bus pins (driver outputs and receiver inputs) are fault protected against overvoltages up to ±60V and are protected against ±16.5kV ESD strikes without latch-up. Additionally, these transceivers operate in environments with common mode voltages up to ±15V (exceeds the RS-485 requirement), making this fault-protected RS-485 family one of the more robust on the market. Transmitters (Tx) deliver an exceptional 2.5V (typical) differential output voltage into the RS-485 specified 54Ω load. This yields better noise immunity than standard RS-485 ICs or allows up to six 120Ω terminations in star topologies. Receiver (Rx) inputs feature a “Full Fail-Safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or on a terminated but undriven (idle) bus. Rx outputs feature high drive levels; typically, 15mA @ VOL = 1V (to ease the design of opto-coupled isolated interfaces). Half duplex (Rx inputs and Tx outputs multiplexed together) and full duplex pinouts are available. See Table 1 on page 2 for key features and configurations by device number. For a fault-protected RS-485 transceiver with a ±25V extended common mode range, please see the ISL32490E and ISL32483E data sheets. • Fault-Protected RS-485 Bus Pins . . . . . . . . . . . . . . Up to ±60V • Extended Common Mode Range . . . . . . . . . . . . . . . . . . . ±15V Larger Than Required for RS-485 • 1/4 Unit Load for Up to 128 Devices on the Bus • ±16.5kV HBM ESD Protection on RS-485 Bus Pins • High Transient Over-Voltage Tolerance . . . . . . . . . . . . . . .±80V • Full Fail-Safe (Open, Short, Terminated) RS-485 Receivers • High Rx IOL for Opto-Couplers in Isolated Designs • Hot Plug Circuitry: Tx and Rx Outputs Remain Three-State During Power-Up/Power-Down • Choice of RS-485 Data Rates . . . . . . . . . . . .250kbps to 15Mbps • Low Quiescent Supply Current . . . . . . . . . . . . . . . . . . . 2.3mA • Ultra Low Shutdown Supply Current . . . . . . . . . . . . . . . . 10µA Applications • Utility Meters/Automated Meter Reading Systems • High Node Count RS-485 Systems • PROFIBUS® and RS-485 Based Field Bus Networks, and Factory Automation • Security Camera Networks • Building Lighting and Environmental Control Systems • Industrial/Process Control Networks 20 15 VID = ±1V B 12 COMMON MODE RANGE 15 VOLTAGE (V) A 10 5 0 RO 0 -7 -15 -5 STANDARD RS-485 TRANSCEIVER TIME (20ns/DIV) FIGURE 1. EXCEPTIONAL Rx OPERATES AT >15Mbps EVEN WITH ±15V COMMON MODE VOLTAGE January 21, 2011 FN7784.0 1 ISL3247xE FIGURE 2. TRANSCEIVERS DELIVER SUPERIOR COMMON MODE RANGE vs STANDARD RS-485 DEVICES CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas Inc. 2011. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL32470E, ISL32472E, ISL32475E, ISL32478E TABLE 1. SUMMARY OF FEATURES HALF/FULL DUPLEX DATA RATE (Mbps) SLEW-RATE LIMITED? EN PINS? HOT PLUG? QUIESCENT ICC (mA) LOW POWER SHDN? PIN COUNT ISL32470E Full 0.25 Yes Yes Yes 2.3 Yes 14 ISL32472E Half 0.25 Yes Yes Yes 2.3 Yes 8 ISL32475E Half 1 Yes Yes Yes 2.3 Yes 8 ISL32478E Half 15 No Yes Yes 2.3 Yes 8 PART NUMBER Ordering Information PART NUMBER (Notes 1, 2, 3) PART MARKING TEMP. RANGE (°C) PACKAGE (Pb-Free) PKG. DWG. # ISL32470EIBZ ISL32470 EIBZ -40 to +85 14 Ld SOIC M14.15 ISL32472EIBZ 32472 EIBZ -40 to +85 8 Ld SOIC M8.15 ISL32475EIBZ 32475 EIBZ -40 to +85 8 Ld SOIC M8.15 ISL32478EIBZ 32478 EIBZ -40 to +85 8 Ld SOIC M8.15 NOTES: 1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications. 2. 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. 3. For Moisture Sensitivity Level (MSL), please see device information pages for ISL32470E, ISL32472E, ISL32475E, ISL32478E. For more information on MSL please see techbrief TB363. Pin Configurations ISL32470E (14 LD SOIC) TOP VIEW ISL32472E, ISL32475E, ISL32478E (8 LD SOIC) TOP VIEW RO 1 RE 2 DE 3 DI 4 R D 8 VCC NC 1 7 B/Z RO 2 6 A/Y RE 3 5 GND DE 4 DI 5 2 14 VCC R 13 NC 12 A 11 B D 10 Z GND 6 9 Y GND 7 8 NC FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Pin Descriptions PIN NAME 8 LD PIN # 14 LD PIN # RO 1 2 Receiver output. If A-B ≥ 10mV, RO is high; if A-B ≤ 200mV, RO is low; RO = High if A and B are unconnected (floating), shorted together, or connected to an undriven, terminated bus. RE 2 3 Receiver output enable. RO is enabled when RE is low; RO is high impedance when RE is high. Internally pulled low. DE 3 4 Driver output enable. The driver outputs, Y and Z, are enabled by bringing DE high. They are high impedance when DE is low. Internally pulled high. DI 4 5 Driver input. A low on DI forces output Y low and output Z high. Similarly, a high on DI forces output Y high and output Z low. GND 5 6, 7 A/Y 6 - ±60V Fault and ±16.5kV HBM ESD Protected, RS-485/RS-422 level, non-inverting receiver input and non-inverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1. B/Z 7 - ±60V Fault and ±16.5kV HBM ESD Protected, RS-485/RS-422 level, inverting receiver input and inverting driver output. Pin is an input if DE = 0; pin is an output if DE = 1. A - 12 ±60V Fault and ±15kV HBM ESD Protected, RS-485/RS-422 level, non-inverting receiver input. B - 11 ±60V Fault and ±15kV HBM ESD Protected, RS-485/RS-422 level, inverting receiver input. Y - 9 ±60V Fault and ±15kV HBM ESD Protected, RS-485/RS-422 level, non-inverting driver output. Z - 10 ±60V Fault and ±15kV HBM ESD Protected, RS-485/RS-422 level, inverting driver output. VCC 8 14 System power supply input (4.5V to 5.5V). NC - 1, 8, 13 FUNCTION Ground connection. No Internal Connection. Truth Tables RECEIVING INPUTS TRANSMITTING INPUTS OUTPUTS RE DE DI Z Y X 1 1 0 1 X 1 0 1 0 0 0 X High-Z High-Z 1 0 X High-Z (see Note) High-Z (see Note) NOTE: Low Power Shutdown Mode (see Note 11, page 9). OUTPUT RE DE Half Duplex DE Full Duplex A-B RO 0 0 X ≥ -0.01V 1 0 0 X ≤ -0.2V 0 0 0 X Inputs Open/Shorted 1 1 0 0 X High-Z (see Note) 1 1 1 X High-Z NOTE: Low Power Shutdown Mode (see Note 11, page 9). 3 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Typical Operating Circuits +5V +5V + 13, 14 VCC 2 RO R 0.1µF 0.1µF + 13, 14 RT A 12 VCC 9 Y B 11 10 Z D 3 RE DE 4 4 DE 5 DI DI 5 RE 3 RT Z 10 11 B Y 9 D R 12 A GND RO 2 GND 6, 7 6, 7 ISL32470E FULL DUPLEX EXAMPLE +5V +5V + 8 0.1µF 0.1µF + 8 VCC 1 RO VCC R D 2 RE B/Z 3 DE A/Y 4 DI 7 6 RT RT DI 4 7 B/Z DE 3 6 A/Y RE 2 R D GND GND 5 5 RO 1 ISL32472E, ISL32475E, ISL32478E HALF DUPLEX EXAMPLE 4 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Absolute Maximum Ratings Thermal Information VCC to Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V Input Voltages DI, DE, RE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (VCC + 0.3V) Input/Output Voltages A/Y, B/Z, A, B, Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±60V A/Y, B/Z, A, B, Y, Z (Transient Pulse Through 100Ω, Note 15). . . . . . . . . . . . . . . . . . . ±80V RO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to (VCC +0.3V) Short Circuit Duration Y, Z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Indefinite ESD Rating . . . . . . . . . . . . . . . . . . . . see “ESD PERFORMANCE” on page 6 Latch-up (per JESD78, Level 2, Class A) . . . . . . . . . . . . . . . . . . . . . +125°C Thermal Resistance (Typical) θJA (°C/W) θJC (°C/W) 8 Ld SOIC Package (Notes 4, 5) . . . . . . . . . . 116 47 14 Ld SOIC Package (Notes 4, 5) . . . . . . . . . 88 39 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 Recommended Operating Conditions Supply Voltage (VCC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C Bus Pin Common Mode Voltage Range. . . . . . . . . . . . . . . . . . -15V to +15V 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: 4. θJA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 5. For θJC, the “case temp” location is taken at the package top center. Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are VCC = 5V, TA = +25°C (Note 6). Boldface limits apply over the operating temperature range, -40°C to +85°C. PARAMETER TEMP (°C) MIN (Note 14) TYP MAX (Note 14) UNITS Full - - VCC V RL = 100Ω (RS-422) Full 2.4 3.2 - V RL = 54Ω (RS-485) Full 1.5 2.5 VCC V RL = 54Ω (PROFIBUS, VCC ≥ 5V) Full 2.0 2.5 - RL = 21Ω (Six 120Ω terminations for Star Configurations, VCC ≥ 4.75V) Full 0.8 1.3 - V SYMBOL TEST CONDITIONS DC CHARACTERISTICS Driver Differential VOUT (No load) VOD1 Driver Differential VOUT (Loaded, Figure 3A) VOD2 Change in Magnitude of Driver Differential VOUT for Complementary Output States ΔVOD RL = 54Ω or 100Ω (Figure 3A) Full - - 0.2 V Driver Differential VOUT with Common Mode Load (Figure 3B) VOD3 RL = 60Ω, -7V ≤ VCM ≤ 12V Full 1.5 2.1 VCC V RL = 60Ω, -15V ≤ VCM ≤ 15V (VCC ≥ 4.75V) Full 1.7 2.3 - V Driver Common-Mode VOUT (Figure 3A) VOC RL = 54Ω or 100Ω Full -1 - 3 V Change in Magnitude of Driver Common-Mode VOUT for Complementary Output States ΔVOC RL = 54Ω or 100Ω (Figure 3A) Full - - 0.2 V Driver Short-Circuit Current IOSD DE = VCC, -15V ≤ VO ≤ 15V (Note 8) Full -250 - 250 mA IOSD1 At First Foldback, 22V ≤ VO ≤ -22V Full -83 - 83 mA IOSD2 At Second Foldback, 35V ≤ VO ≤ -35V Full -13 - 13 mA Logic Input High Voltage VIH DE, DI, RE Full 2.5 - - V Logic Input Low Voltage VIL DE, DI, RE Full - - 0.8 V Logic Input Current IIN1 DI Full -1 - 1 µA DE, RE Full -15 6 15 µA 5 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are VCC = 5V, TA = +25°C (Note 6). Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) PARAMETER SYMBOL Input/Output Current (A/Y, B/Z) IIN2 Input Current (A, B) (Full Duplex Versions Only) IIN3 Output Leakage Current (Y, Z) (Full Duplex Versions Only) IOZD TEMP (°C) MIN (Note 14) TYP MAX (Note 14) UNITS Full - 110 250 µA Full -200 -75 - µA VIN = ±15V Full -800 ±240 800 µA VIN = ±60V (Note 16) Full -6 ±0.5 6 mA VIN = 12V Full - 90 125 µA VIN = -7V Full -100 -70 - µA VIN = ±15V Full -500 ±200 500 µA VIN = ±60V (Note 16) Full -3 ±0.4 3 mA VIN = 12V Full - 20 200 µA VIN = -7V Full -100 -5 - µA VIN = ±15V Full -500 ±40 500 µA VIN = ±60V (Note 16) Full -3 ±0.1 3 mA TEST CONDITIONS DE = 0V, VCC = 0V or VIN = 12V 5.5V VIN = -7V VCC = 0V or 5.5V RE = 0V, DE = 0V, VCC = 0V or 5.5V Receiver Differential Threshold Voltage V TH -15V ≤ VCM ≤ 15V Full -200 -100 -10 mV Receiver Input Hysteresis ΔV TH -15V ≤ VCM ≤ 15V 25 - 25 - mV Receiver Output High Voltage VOH IO = -2mA, VID = -10mV Full VCC - 0.5 4.75 - V IO = -8mA, VID = -10mV Full 2.8 4.2 - V Receiver Output Low Voltage VOL IO = 6mA, VID = -200mV Full - 0.27 0.4 V Receiver Output Low Current IOL VO = 1V, VID = -200mV Full 15 22 - mA Three-State (High Impedance) Receiver Output Current IOZR 0V ≤ VO ≤ VCC Full -1 0.01 1 µA Receiver Short-Circuit Current IOSR 0V ≤ VO ≤ VCC Full ±12 - ±110 mA DE = VCC, RE = 0V or VCC, DI = 0V or VCC Full - 2.3 4.5 mA DE = 0V, RE = VCC, DI = 0V or VCC Full - 10 50 µA Human Body Model, 1/2 Duplex From Bus Pins to Full Duplex GND 25 - ±16.5 - kV 25 - ±15 - kV Human Body Model, per JEDEC 25 - ±8 - kV Machine Model 25 - ±700 - V SUPPLY CURRENT No-Load Supply Current (Note 7) ICC Shutdown Supply Current ISHDN ESD PERFORMANCE RS-485 Pins (A, Y, B, Z, A/Y, B/Z) All Pins DRIVER SWITCHING CHARACTERISTICS (250kbps Versions; ISL32470E and ISL32472E) Driver Differential Output Delay tPLH, tPHL RD = 54Ω, CD = 50pF (Figure 4) Full - 320 450 ns Driver Differential Output Skew tSKEW RD = 54Ω, CD = 50pF (Figure 4) Full - 6 30 ns Driver Differential Rise or Fall Time tR, tF RD = 54Ω, CD = 50pF (Figure 4) Full 400 650 1200 ns 6 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are VCC = 5V, TA = +25°C (Note 6). Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) PARAMETER TEMP (°C) MIN (Note 14) TYP MAX (Note 14) UNITS CD = 820pF (Figure 6) Full 0.25 1.5 - Mbps SYMBOL Maximum Data Rate fMAX TEST CONDITIONS Driver Enable to Output High tZH SW = GND (Figure 5), (Note 9) Full - - 1200 ns Driver Enable to Output Low tZL SW = VCC (Figure 5), (Note 9) Full - - 1200 ns Driver Disable from Output Low tLZ SW = VCC (Figure 5) Full - - 120 ns Driver Disable from Output High tHZ SW = GND (Figure 5) Full - - 120 ns (Note 11) Full 60 160 600 ns Time to Shutdown tSHDN Driver Enable from Shutdown to Output High tZH(SHDN) SW = GND (Figure 5), (Notes 11, 12) Full - - 2500 ns Driver Enable from Shutdown to Output Low tZL(SHDN) SW = VCC (Figure 5), (Notes 11, 12) Full - - 2500 ns DRIVER SWITCHING CHARACTERISTICS (1Mbps Versions; ISL32475E) Driver Differential Output Delay tPLH, tPHL RD = 54Ω, CD = 50pF (Figure 4) Full - 70 125 ns Driver Differential Output Skew tSKEW RD = 54Ω, CD = 50pF (Figure 4) Full - 4.5 15 ns Driver Differential Rise or Fall Time tR, tF RD = 54Ω, CD = 50pF (Figure 4) Full 70 170 300 ns Maximum Data Rate fMAX CD = 820pF (Figure 6) Full 1 4 - Mbps Driver Enable to Output High tZH SW = GND (Figure 5), (Note 9) Full - - 350 ns Driver Enable to Output Low tZL SW = VCC (Figure 5), (Note 9) Full - - 300 ns Driver Disable from Output Low tLZ SW = VCC (Figure 5) Full - - 120 ns Driver Disable from Output High tHZ SW = GND (Figure 5) Full - - 120 ns (Note 11) Full 60 160 600 ns Time to Shutdown tSHDN Driver Enable from Shutdown to Output High tZH(SHDN) SW = GND (Figure 5), (Notes 11, 12) Full - - 2000 ns Driver Enable from Shutdown to Output Low tZL(SHDN) SW = VCC (Figure 5), (Notes 11, 12) Full - - 2000 ns DRIVER SWITCHING CHARACTERISTICS (15Mbps Versions; ISL32478E) Driver Differential Output Delay tPLH, tPHL RD = 54Ω, CD = 50pF (Figure 4) Full - 21 45 ns Driver Differential Output Skew tSKEW RD = 54Ω, CD = 50pF (Figure 4) Full - 3 6 ns Driver Differential Rise or Fall Time tR, tF RD = 54Ω, CD = 50pF (Figure 4) Full 5 17 30 ns Maximum Data Rate fMAX CD = 470pF (Figure 6) Full 15 25 - Mbps Driver Enable to Output High tZH SW = GND (Figure 5), (Note 9) Full - - 100 ns Driver Enable to Output Low tZL SW = VCC (Figure 5), (Note 9) Full - - 100 ns Driver Disable from Output Low tLZ SW = VCC (Figure 5) Full - - 120 ns Driver Disable from Output High tHZ SW = GND (Figure 5) Full - - 120 ns (Note 11) Full 60 160 600 ns Time to Shutdown tSHDN Driver Enable from Shutdown to Output High tZH(SHDN) SW = GND (Figure 5), (Notes 11, 12) Full - - 2000 ns Driver Enable from Shutdown to Output Low tZL(SHDN) SW = VCC (Figure 5), (Notes 11, 12) Full - - 2000 ns 7 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are VCC = 5V, TA = +25°C (Note 6). Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) PARAMETER SYMBOL TEST CONDITIONS TEMP (°C) MIN (Note 14) TYP MAX (Note 14) UNITS RECEIVER SWITCHING CHARACTERISTICS (250kbps Versions; ISL32470E and ISL32472E) Maximum Data Rate fMAX (Figure 7) Full 0.25 5 - Mbps Receiver Input to Output Delay tPLH, tPHL (Figure 7) Full - 200 280 ns Receiver Skew |tPLH - tPHL| tSKD (Figure 7) Full - 4 10 ns Receiver Enable to Output Low tZL RL = 1kΩ, CL = 15pF, SW = VCC (Figure 8), (Note 10) Full - - 50 ns Receiver Enable to Output High tZH RL = 1kΩ, CL = 15pF, SW = GND (Figure 8), (Note 10) Full - - 50 ns Receiver Disable from Output Low tLZ RL = 1kΩ, CL = 15pF, SW = VCC (Figure 8) Full - - 50 ns Receiver Disable from Output High tHZ RL = 1kΩ, CL = 15pF, SW = GND (Figure 8) Full - - 50 ns (Note 11) Full 60 160 600 ns Time to Shutdown tSHDN Receiver Enable from Shutdown to Output High tZH(SHDN) RL = 1kΩ, CL = 15pF, SW = GND (Figure 8), (Notes 11, 13) Full - - 2000 ns Receiver Enable from Shutdown to Output Low tZL(SHDN) RL = 1kΩ, CL = 15pF, SW = VCC (Figure 8), (Notes 11, 13) Full - - 2000 ns RECEIVER SWITCHING CHARACTERISTICS (1Mbps Versions; ISL32475E) Maximum Data Rate Receiver Input to Output Delay Receiver Skew |tPLH - tPH| fMAX (Figure 7) Full 1 15 - Mbps tPLH, tPHL (Figure 7) Full - 90 150 ns tSKD (Figure 7) Full - 4 10 ns Receiver Enable to Output Low tZL RL = 1kΩ, CL = 15pF, SW = VCC (Figure 8), (Note 10) Full - - 50 ns Receiver Enable to Output High tZH RL = 1kΩ, CL = 15pF, SW = GND (Figure 8), (Note 10) Full - - 50 ns Receiver Disable from Output Low tLZ RL = 1kΩ, CL = 15pF, SW = VCC (Figure 8) Full - - 50 ns Receiver Disable from Output High tHZ RL = 1kΩ, CL = 15pF, SW = GND (Figure 8) Full - - 50 ns (Note 11) Full 60 160 600 ns Time to Shutdown tSHDN Receiver Enable from Shutdown to Output High tZH(SHDN) RL = 1kΩ, CL = 15pF, SW = GND (Figure 8), (Notes 11, 13) Full - - 2000 ns Receiver Enable from Shutdown to Output Low tZL(SHDN) RL = 1kΩ, CL = 15pF, SW = VCC (Figure 8), (Notes 11, 13) Full - - 2000 ns RECEIVER SWITCHING CHARACTERISTICS (15Mbps Versions; ISL32478E) Maximum Data Rate Receiver Input to Output Delay Receiver Skew |tPLH - tPHL | fMAX (Figure 7) Full 15 25 - Mbps tPLH, tPHL (Figure 7) Full - 35 70 ns tSKD (Figure 7) Full - 4 10 ns Receiver Enable to Output Low tZL RL = 1kΩ, CL = 15pF, SW = VCC (Figure 8), (Note 10) Full - - 50 ns Receiver Enable to Output High tZH RL = 1kΩ, CL = 15pF, SW = GND (Figure 8), (Note 10) Full - - 50 ns Receiver Disable from Output Low tLZ RL = 1kΩ, CL = 15pF, SW = VCC (Figure 8) Full - - 50 ns Receiver Disable from Output High tHZ RL = 1kΩ, CL = 15pF, SW = GND (Figure 8) Full - - 50 ns 8 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Electrical Specifications Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified. Typicals are VCC = 5V, TA = +25°C (Note 6). Boldface limits apply over the operating temperature range, -40°C to +85°C. (Continued) PARAMETER TEMP (°C) MIN (Note 14) TYP MAX (Note 14) UNITS (Note 11) Full 60 160 600 ns SYMBOL Time to Shutdown TEST CONDITIONS tSHDN Receiver Enable from Shutdown to Output High tZH(SHDN) RL = 1kΩ, CL = 15pF, SW = GND (Figure 8), (Notes 11, 13) Full - - 2000 ns Receiver Enable from Shutdown to Output Low tZL(SHDN) RL = 1kΩ, CL = 15pF, SW = VCC (Figure 8), (Notes 11, 13) Full - - 2000 ns NOTES: 6. 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. 7. Supply current specification is valid for loaded drivers when DE = 0V. 8. Applies to peak current. See “Typical Performance Curves” beginning on page 13 for more information. 9. Keep RE = 0 to prevent the device from entering SHDN. 10. The RE signal high time must be short enough (typically <100ns) to prevent the device from entering SHDN. 11. Transceivers are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 60ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. See “Low Power Shutdown Mode” on page 13. 12. Keep RE = VCC, and set the DE signal low time >600ns to ensure that the device enters SHDN. 13. Set the RE signal high time >600ns to ensure that the device enters SHDN. 14. Compliance to data sheet limits is assured by one or more methods: production test, characterization and/or design. 15. Tested according to TIA/EIA-485-A, Section 4.2.6 (±80V for 15µs at a 1% duty cycle). 16. See “Caution” statement below the “Recommended Operating Conditions” section on page 5. Test Circuits and Waveforms VCC RL/2 DE DI VCC Z DI VOD D Y Z FIGURE 3A. VOD AND VOC VOC VCM VOD D Y RL/2 375Ω RL/2 DE VOC RL/2 375Ω FIGURE 3B. VOD AND VOC WITH COMMON MODE LOAD FIGURE 3. DC DRIVER TEST CIRCUITS 9 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Test Circuits and Waveforms (Continued) 3V DI 1.5V 1.5V 0V VCC DE CD D tPHL tPLH Z DI RD Y OUT (Z) VOH OUT (Y) VOL SIGNAL GENERATOR 90% DIFF OUT (Y - Z) +VOD 90% 10% 10% tR -VOD tF SKEW = |tPLH - tPHL| FIGURE 4A. TEST CIRCUIT FIGURE 4B. MEASUREMENT POINTS FIGURE 4. DRIVER PROPAGATION DELAY AND DIFFERENTIAL TRANSITION TIMES DE Z DI 110Ω VCC D SIGNAL GENERATOR SW Y GND CL 3V DE (Note 11) 1.5V 0V tZH, tZH(SHDN) tHZ OUTPUT HIGH (Note 11) OUTPUT RE DI SW CL (pF) tHZ Y/Z X 1/0 GND 50 tLZ Y/Z tZH Y/Z 0 (Note 9) tZL Y/Z tZH(SHDN) tZL(SHDN) X 0/1 VCC 50 1/0 GND 100 0 (Note 9) 0/1 VCC 100 Y/Z 1 (Note 12) 1/0 GND 100 Y/Z 1 (Note 12) 0/1 VCC 100 VOH - 0.5V 2.3V OUT (Y, Z) PARAMETER 1.5V VOH 0V tZL, tZL(SHDN) tLZ (Note 11) VCC OUT (Y, Z) 2.3V VOL + 0.5V OUTPUT LOW FIGURE 5A. TEST CIRCUIT VOL FIGURE 5B. MEASUREMENT POINTS FIGURE 5. DRIVER ENABLE AND DISABLE TIMES VCC DE + Z DI 54Ω D Y CD 3V DI VOD 0V - SIGNAL GENERATOR +VOD DIFF OUT (Y - Z) -VOD FIGURE 6A. TEST CIRCUIT 0V FIGURE 6B. MEASUREMENT POINTS FIGURE 6. DRIVER DATA RATE 10 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Test Circuits and Waveforms (Continued) B RE 750mV 15pF B R A 0V RO 0V A -750mV tPLH SIGNAL GENERATOR tPHL SIGNAL GENERATOR VCC 50% RO 50% VCM 0V FIGURE 7A. TEST CIRCUIT FIGURE 7B. MEASUREMENT POINTS FIGURE 7. RECEIVER PROPAGATION DELAY AND DATA RATE RE B A R 1kΩ RO SIGNAL GENERATOR 15pF VCC SW GND RE 3V (Note 11) 1.5V 0V tZH, tZH(SHDN) (Note 11) PARAMETER 1.5V DE A SW tHZ 0 +1.5V GND tLZ 0 -1.5V VCC tZL, tZL(SHDN) tZH (Note 10) 0 +1.5V GND (Note 11) tZL (Note 10) 0 -1.5V VCC RO tZH(SHDN) (Note 13) 0 +1.5V GND tZL(SHDN) (Note 13) 0 -1.5V VCC FIGURE 8A. TEST CIRCUIT tHZ OUTPUT HIGH 1.5V RO VOH - 0.5V VOH 0V tLZ VCC 1.5V VOL + 0.5V OUTPUT LOW VOL FIGURE 8B. MEASUREMENT POINTS FIGURE 8. RECEIVER ENABLE AND DISABLE TIMES Application Information RS-485 and RS-422 are differential (balanced) data transmission standards used for long haul or noisy environments. RS-422 is a subset of RS-485, so RS-485 transceivers are also RS-422 compliant. RS-422 is a point-to-multipoint (multidrop) standard, which allows only one driver and up to 10 (assuming one-unit load devices) receivers on each bus. RS-485 is a true multipoint standard, which allows up to 32 one-unit load devices (any combination of drivers and receivers) on each bus. To allow for multipoint operation, the RS-485 specification requires that drivers must handle bus contention without sustaining any damage. Another important advantage of RS-485 is the extended common mode range (CMR), which specifies that the driver outputs and receiver inputs withstand signals that range from +12V to -7V. RS-422 and RS-485 are intended for runs as long as 4000 feet; thus, the wide CMR is necessary to handle ground potential differences, as well as voltages induced in the cable by external fields. The ISL32470E, ISL32472E, ISL32475E, ISL32478E is a family of ruggedized RS-485 transceivers that improves on the RS-485 basic requirements and therefore increases system reliability. The CMR increases to ±15V, while the RS-485 bus pins (receiver inputs and driver outputs) include fault protection against voltages and transients up to ±60V. Additionally, larger-than-required differential 11 output voltages (VOD) increase noise immunity, while the ±16.5kV built-in ESD protection complements the fault protection. Receiver (Rx) Features These devices utilize a differential input receiver for maximum noise immunity and common mode rejection. Input sensitivity is better than ±200mV, as required by the RS-422 and RS-485 specifications. Receiver input (load) current surpasses the RS-422 specification of 3mA and is four times lower than the RS-485 “Unit Load (UL)” requirement of 1mA maximum. Thus, these products are known as “one-quarter UL” transceivers, and there can be up to 128 of these devices on a network while still complying with the RS-485 loading specification. The Rx functions with common mode voltages as great as ±15V, making them ideal for industrial or long networks where induced voltages are a realistic concern. All the receivers include a “full fail-safe” function that guarantees a high-level receiver output if the receiver inputs are unconnected (floating), shorted together, or connected to a terminated bus with all the transmitters disabled (i.e., an idle bus). Rx outputs feature high drive levels (typically 22mA @ VOL = 1V) to ease the design of optically coupled isolated interfaces. FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E The RS-485/RS-422 driver is a differential output device that delivers at least 1.5V across a 54Ω load (RS-485) and at least 2.4V across a 100Ω load (RS-422). The drivers feature low propagation delay skew to maximize bit width and to minimize EMI, and all drivers are three-statable via the active high DE input. The 250kbps and 1Mbps driver outputs are slew rate limited to minimize EMI and to minimize reflections in unterminated or improperly terminated networks. Outputs of the ISL32478E drivers are not limited; thus, faster output transition times allow data rates of at least 15Mbps. High Overvoltage (Fault) Protection Increases Ruggedness The ±60V (referenced to the IC GND) fault protection on the RS-485 pins makes these transceivers some of the most rugged on the market. This level of protection makes the ISL32470E, ISL32472E, ISL32475E, ISL32478E perfect for applications where power (e.g., 24V and 48V supplies) must be routed in the conduit with the data lines, or for outdoor applications where large transients are likely to occur. When power is routed with the data lines, even a momentary short between the supply and data lines will destroy an unprotected device. The ±60V fault levels of this family are at least five times higher than the levels specified for standard RS-485 ICs. The ISL32470E, ISL32472E, ISL32475E, ISL32478E protection is active whether the Tx is enabled or disabled, and even if the IC is powered down. If transients or voltages (including overshoots and ringing) greater than ±60V are possible, then additional external protection is required. Wide Common Mode Voltage (CMV) Tolerance Improves Operating Range RS-485 networks operating in industrial complexes or over long distances are susceptible to large CMV variations. Either of these operating environments may suffer from large node-to-node ground potential differences or CMV pickup from external electromagnetic sources, and devices with only the minimum required +12V to -7V CMR may malfunction. The ISL32470E, ISL32472E, ISL32475E, ISL32478E has extended ±15V CMR, which allows for operation in environments that would overwhelm lesser transceivers. Additionally, the Rx will not phase invert (erroneously change state), even with CMVs of ±40V or differential voltages as large as 40V. High VOD Improves Noise Immunity and Flexibility The ISL32470E, ISL32472E, ISL32475E, ISL32478E driver design delivers larger differential output voltages (VOD) than the RS-485 standard requires or than most RS-485 transmitters can deliver. The typical ±2.5V VOD provides more noise immunity than networks built using many other transceivers. 12 Hot Plug Function When a piece of equipment powers up, there is a period of time in which the processor or ASIC driving the RS-485 control lines (DE, RE) is unable to ensure that the RS-485 Tx and Rx outputs are kept disabled. If the equipment is connected to the bus, a driver activating prematurely during power-up may crash the bus. To avoid this scenario, the ISL32470E, ISL32472E, ISL32475E, ISL32478E devices incorporate a “Hot Plug” function. Circuitry monitoring VCC ensures that, during power-up and power-down, the Tx and Rx outputs remain disabled, regardless of the state of DE and RE, if VCC is less than ≈3.5V. This gives the processor/ASIC a chance to stabilize and drive the RS-485 control lines to the proper states. Figure 9 illustrates the power-up and power-down performance of the ISL32470E, ISL32472E, ISL32475E, ISL32478E compared to an RS-485 IC without the Hot Plug feature. DE, DI = VCC RE = GND 3.5V 2.8V 5.0 2.5 VCC VCC (V) Driver (Tx) Features 0 5.0 RL = 1kΩ 2.5 0 A/Y ISL3247xE ISL83088E RL = 1kΩ RO ISL3247xE 5.0 2.5 0 RECEIVER OUTPUT (V) The Rx in the 250kbps and 1Mbps versions include noise filtering circuitry to reject high-frequency signals. The 1Mbps version typically rejects pulses narrower than 50ns (equivalent to 20Mbps), while the 250kbps Rx rejects pulses below 150ns (6.7Mbps). Another advantage of the large VOD is the ability to drive more than two bus terminations, which allows for utilizing the ISL32470E, ISL32472E, ISL32475E, ISL32478E in “star” and other multi-terminated, nonstandard network topologies. Figure 10 details the transmitter’s VOD vs IOUT characteristic and includes load lines for four (30Ω) and six (20Ω) 120Ω terminations. Figure 10 shows that the driver typically delivers ±1.3V into six terminations, and the “Electrical Specifications” table guarantees a VOD of ±0.8V at 21Ω over the full temperature range. The RS-485 standard requires a minimum 1.5V VOD into two terminations, but the ISL32470E, ISL32472E, ISL32475E, ISL32478E delivers RS-485 voltage levels with two to three times the number of terminations. DRIVER Y OUTPUT (V) Receivers easily meet the data rates supported by the corresponding driver, and all receiver outputs are three-statable via the active low RE input. TIME (40µs/DIV) FIGURE 9. HOT PLUG PERFORMANCE (ISL3247xE) vs ISL83088E WITHOUT HOT PLUG CIRCUITRY ESD Protection All pins on these devices include class 3 (>8kV) Human Body Model (HBM) ESD protection structures that are good enough to survive ESD events commonly seen during manufacturing. Even so, the RS-485 pins (driver outputs and receiver inputs) incorporate more advanced structures, which allows them to survive ESD events in excess of ±16.5kV HBM (±15kV for full-duplex versions). The RS-485 pins are particularly vulnerable to ESD strikes because they typically connect to an exposed port on the exterior of the finished product. Simply touching the port pins, or connecting a cable, can cause an ESD event that might destroy unprotected ICs. These new ESD structures protect the device whether or not it is powered up, FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E and without interfering with the exceptional ±15V CMR. This built-in ESD protection minimizes the need for board-level protection structures (e.g., transient suppression diodes) and the associated, undesirable capacitive load they present. Data Rate, Cables, and Terminations RS-485/RS-422 are intended for network lengths up to 4000 feet, but the maximum system data rate decreases as the transmission length increases. Devices operating at 15Mbps may be used at lengths up to 150 feet (46m), but the distance can be increased to 328 feet (100m) by operating at 10Mbps. The 1Mbps versions can operate at full data rates with lengths up to 800 feet (244m). Jitter is the limiting parameter at these faster data rates, so employing encoded data streams (e.g., Manchester coded or Return-to-Zero) may allow increased transmission distances. The slow versions can operate at 115kbps or less at the full 4000-foot (1220m) distance, or at 250kbps for lengths up to 3000 feet (915m). DC cable attenuation is the limiting parameter, so using better-quality cables (e.g., 22 AWG) may allow increased transmission distance. Twisted pair is the cable of choice for RS-485/RS-422 networks. Twisted-pair cables tend to pick up noise and other electromagnetically induced voltages as common mode signals, which are effectively rejected by the differential receivers in these ICs. Proper termination is imperative, when using the 15Mbps devices, to minimize reflections. Short networks using the 250kbps versions need not be terminated; however, terminations are recommended unless power dissipation is an overriding concern. In point-to-point or point-to-multipoint (single driver on bus like RS-422) networks, the main cable should be terminated in its characteristic impedance (typically 120Ω) at the end farthest from the driver. In multi-receiver applications, stubs connecting receivers to the main cable should be kept as short as possible. Multipoint (multi-driver) systems require that the main cable be terminated in its characteristic impedance at both ends. Stubs connecting a transceiver to the main cable should be kept as short as possible. Typical Performance Curves +25°C RD = 54Ω +85°C 50 40 RD = 100Ω 30 20 10 0 0 1 In the event of a major short circuit condition, devices also include a thermal shutdown feature that disables the drivers whenever the die temperature becomes excessive. This eliminates the power dissipation, allowing the die to cool. The drivers automatically re-enable after the die temperature drops by about 15°C. If the contention persists, the thermal shutdown/re-enable cycle repeats until the fault is cleared. Receivers stay operational during thermal shutdown. Low Power Shutdown Mode These BiCMOS transceivers all use a fraction of the power required by competitive devices, but they also include a shutdown feature that reduces the already low quiescent ICC to a 10µA trickle. These devices enter shutdown whenever the receiver and driver are simultaneously disabled (RE = VCC and DE = GND) for a period of at least 600ns. Disabling both the driver and the receiver for less than 60ns guarantees that the transceiver will not enter shutdown. Note that receiver and driver enable times increase when the transceiver enables from shutdown. Refer to Notes 9, 10, 11, 12 and 13 on page 9, at the end of the “Electrical Specifications” table, for more information. VCC = 5V, TA = +25°C; Unless Otherwise Specified. RD = 30Ω 70 60 The driver output stages incorporate a double foldback short circuit current limiting scheme, which ensures that the output current never exceeds the RS-485 specification, even at the common mode and fault condition voltage range extremes. The first foldback current level (≈70mA) is set to ensure that the driver never folds back when driving loads with common mode voltages up to ±15V. The very low second foldback current setting (≈9mA) minimizes power dissipation if the Tx is enabled when a fault occurs. 3.6 RD = 20Ω 80 As stated previously, the RS-485 specification requires that drivers survive worst-case bus contentions undamaged. These transceivers meet this requirement via driver output short circuit current limits and on-chip thermal shutdown circuitry. DIFFERENTIAL OUTPUT VOLTAGE (V) DRIVER OUTPUT CURRENT (mA) 90 Built-In Driver Overload Protection 2 3 4 5 DIFFERENTIAL OUTPUT VOLTAGE (V) FIGURE 10. DRIVER OUTPUT CURRENT vs DIFFERENTIAL OUTPUT VOLTAGE 13 3.4 RD = 100Ω 3.2 3.0 2.8 2.6 RD = 54Ω 2.4 2.2 -40 -25 0 25 50 TEMPERATURE (°C) 75 85 FIGURE 11. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs TEMPERATURE FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Typical Performance Curves VCC = 5V, TA = +25°C; Unless Otherwise Specified. (Continued) 70 2.40 RECEIVER OUTPUT CURRENT (mA) 2.45 DE = VCC, RE = X 2.35 ICC (mA) 2.30 2.25 DE = GND, RE = GND 2.20 2.15 2.10 2.05 2.00 -40 -25 0 25 50 TEMPERATURE (°C) 75 150 40 30 20 10 0 -10 VOH, +85°C -20 VOH, +25°C 0 1 2 3 4 RECEIVER OUTPUT VOLTAGE (V) 5 800 +85°C 600 BUS PIN CURRENT (µA) Y OR Z = LOW 50 +25°C 0 -50 Y OR Z = HIGH +25°C -100 +85°C -150 -60 -50 -40 -30 -20 -10 400 200 Y or Z 0 -200 -400 A/Y or B/Z -600 0 10 20 30 40 50 60 -70 -50 -30 FIGURE 14. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT VOLTAGE 30 50 70 FIGURE 15. BUS PIN CURRENT vs BUS PIN VOLTAGE 8 340 -10 0 10 BUS PIN VOLTAGE (V) OUTPUT VOLTAGE (V) RD = 54Ω, CD = 50pF RD = 54Ω, CD = 50pF 7 335 6 330 tPLH 325 SKEW (ns) PROPAGATION DELAY (ns) VOL, +85°C FIGURE 13. RECEIVER OUTPUT CURRENT vs RECEIVER OUTPUT VOLTAGE 100 OUTPUT CURRENT (mA) VOL, +25°C 50 -30 85 FIGURE 12. SUPPLY CURRENT vs TEMPERATURE 60 320 315 tPHL 310 5 4 3 2 305 1 300 0 |tPLH - tPHL| -40 -25 0 25 TEMPERATURE (°C) 50 75 FIGURE 16. DRIVER DIFFERENTIAL PROPAGATION DELAY vs TEMPERATURE (ISL32470E, ISL32472E) 14 85 -40 -25 0 50 25 TEMPERATURE (°C) 75 85 FIGURE 17. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE (ISL32470E, ISL32472E) FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Typical Performance Curves VCC = 5V, TA = +25°C; Unless Otherwise Specified. (Continued) 4.0 85 RD = 54Ω, CD = 50pF RD = 54Ω, CD = 50pF 3.5 75 SKEW (ns) PROPAGATION DELAY (ns) 80 70 tPLH 65 3.0 tPHL 60 2.5 55 50 -40 0 -25 25 50 75 2.0 -40 85 |tPLH - tPHL| -25 0 TEMPERATURE (°C) FIGURE 18. DRIVER DIFFERENTIAL PROPAGATION DELAY vs TEMPERATURE (ISL32475E) RD = 54Ω, CD = 50pF 3.2 25 3.0 23 tPLH 21 19 tPHL |tPLH - tPHL| -25 25 0 50 TEMPERATURE (°C) 75 2.0 -40 85 A 15 B VID = ±1V 10 5 VOLTAGE (V) VOLTAGE (V) 0 25 50 TEMPERATURE (°C) 75 85 A B VID = ±1V 5 RO 0 RO 0 RO 0 5 RO 0 -5 -5 -15 -25 FIGURE 21. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE (ISL32478E) 5 -10 2.6 2.2 FIGURE 20. DRIVER DIFFERENTIAL PROPAGATION DELAY vs TEMPERATURE (ISL32478E) 10 2.8 2.4 17 15 85 3.4 RD = 54Ω, CD = 50pF 15 -40 75 FIGURE 19. DRIVER DIFFERENTIAL SKEW vs TEMPERATURE (ISL32475E) SKEW (ns) PROPAGATION DELAY (ns) 27 25 50 TEMPERATURE (°C) -10 A -15 B TIME (1µs/DIV) FIGURE 22. RECEIVER PERFORMANCE WITH ±15V CMV (ISL32470E, ISL32472E) 15 A B TIME (400ns/DIV) FIGURE 23. RECEIVER PERFORMANCE WITH ±15V CMV (ISL32475E) FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E 10 VID = ±1V 5 5 DRIVER OUTPUT (V) RO 0 RO 0 -5 -10 A -15 B RD = 54Ω, CD = 50pF DI 0 5 RO 0 3 2 1 0 -1 -2 -3 A/Y - B/Z TIME (1µs/DIV) TIME (20ns/DIV) 5 RO 0 3 2 1 0 -1 -2 -3 A/Y - B/Z TIME (400ns/DIV) FIGURE 26. DRIVER AND RECEIVER WAVEFORMS (ISL32475E) DRIVER OUTPUT (V) 0 DRIVER INPUT (V) RECEIVER OUTPUT (V) DRIVER OUTPUT (V) DI 5 RECEIVER OUTPUT (V) FIGURE 25. DRIVER AND RECEIVER WAVEFORMS (ISL32470E, ISL32472E) FIGURE 24. RECEIVER PERFORMANCE WITH ±15V CMV (ISL32478E) RD = 54Ω, CD = 50pF 5 RD = 54Ω, CD = 50pF DI 5 0 5 0 3 2 1 0 -1 -2 -3 RO DRIVER INPUT (V) B DRIVER INPUT (V) A 15 VOLTAGE (V) VCC = 5V, TA = +25°C; Unless Otherwise Specified. (Continued) RECEIVER OUTPUT (V) Typical Performance Curves A/Y - B/Z TIME (20ns/DIV) FIGURE 27. DRIVER AND RECEIVER WAVEFORMS (ISL32478E) Die Characteristics SUBSTRATE POTENTIAL (POWERED UP): GND PROCESS: Si Gate BiCMOS 16 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Revision History The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you have the latest Rev. DATE REVISION CHANGE January 21, 2011 FN7784.0 Initial Release Products Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, handheld products, and notebooks. Intersil's product families address power management and analog signal processing functions. Go to www.intersil.com/products for a complete list of Intersil product families. *For a complete listing of Applications, Related Documentation and Related Parts, please see the respective device information page on intersil.com: ISL32470E, ISL32472E, ISL32475E, ISL32478E. To report errors or suggestions for this data sheet, please go to www.intersil.com/ask our staff FITs are available from our web site at http://rel.intersil.com/reports/search.php For additional products, see www.intersil.com/product_tree Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems as noted in the quality certifications found at www.intersil.com/design/quality Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 17 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Package Outline Drawing M14.15 14 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE Rev 1, 10/09 8.65 A 3 4 0.10 C A-B 2X 6 14 DETAIL"A" 8 0.22±0.03 D 6.0 3.9 4 0.10 C D 2X 0.20 C 2X 7 PIN NO.1 ID MARK 5 0.31-0.51 B 3 (0.35) x 45° 4° ± 4° 6 0.25 M C A-B D TOP VIEW 0.10 C 1.75 MAX H 1.25 MIN 0.25 GAUGE PLANE C SEATING PLANE 0.10 C 0.10-0.25 1.27 SIDE VIEW (1.27) DETAIL "A" (0.6) NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to AMSEY14.5m-1994. 3. Datums A and B to be determined at Datum H. (5.40) 4. Dimension does not include interlead flash or protrusions. Interlead flash or protrusions shall not exceed 0.25mm per side. 5. The pin #1 indentifier may be either a mold or mark feature. (1.50) 6. Does not include dambar protrusion. Allowable dambar protrusion shall be 0.10mm total in excess of lead width at maximum condition. 7. Reference to JEDEC MS-012-AB. TYPICAL RECOMMENDED LAND PATTERN 18 FN7784.0 January 21, 2011 ISL32470E, ISL32472E, ISL32475E, ISL32478E Package Outline Drawing M8.15 8 LEAD NARROW BODY SMALL OUTLINE PLASTIC PACKAGE Rev 2, 11/10 DETAIL "A" 1.27 (0.050) 0.40 (0.016) INDEX 6.20 (0.244) 5.80 (0.228) AREA 0.50 (0.20) x 45° 0.25 (0.01) 4.00 (0.157) 3.80 (0.150) 1 2 8° 0° 3 0.25 (0.010) 0.19 (0.008) SIDE VIEW “B” TOP VIEW 2.41 (0.095) SEATING PLANE 5.00 (0.197) 4.80 (0.189) 1.75 (0.069) 1.35 (0.053) 1 8 2 7 0.76 (0.030) 1.27 (0.050) 3 6 4 5 -C- 1.27 (0.050) 0.51(0.020) 0.33(0.013) SIDE VIEW “A 0.25(0.010) 0.10(0.004) 0.200 TYPICAL RECOMMENDED LAND PATTERN NOTES: 1. Dimensioning and tolerancing per ANSI Y14.5M-1982. 2. Package length does not include mold flash, protrusions or gate burrs. Mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 3. Package width does not include interlead flash or protrusions. Interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 4. The chamfer on the body is optional. If it is not present, a visual index feature must be located within the crosshatched area. 5. Terminal numbers are shown for reference only. 6. The lead width as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 7. Controlling dimension: MILLIMETER. Converted inch dimensions are not necessarily exact. 8. This outline conforms to JEDEC publication MS-012-AA ISSUE C. 19 FN7784.0 January 21, 2011