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ISL4260EIRZ データシート(PDF) 5 Page - Intersil Corporation |
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ISL4260EIRZ データシート(HTML) 5 Page - Intersil Corporation |
5 / 11 page 5 Detailed Description The ISL4260E operates from a single +3V to +5.5V supply, guarantees a 250kbps minimum data rate, requires only four small external 0.1 μF capacitors, features low power consumption, and meets all ElA RS-232C and V.28 specifications. The circuit is divided into three sections: The charge pump, the transmitters, and the receivers. Charge-Pump Intersil’s new ISL4260E utilizes regulated on-chip dual charge pumps as voltage doublers, and voltage inverters to generate ±5.5V transmitter supplies from a VCC supply as low as 3.0V. This allows these devices to maintain RS-232 compliant output levels over the ±10% tolerance range of 3.3V powered systems. The efficient on-chip power supplies require only four small, external 0.1 μF capacitors for the voltage doubler and inverter functions over the full VCC range; other capacitor combinations can be used as shown in Table 3. The charge pumps operate discontinuously (i.e., they turn off as soon as the V+ and V- supplies are pumped up to the nominal values), resulting in significant power savings. Transmitters The transmitters are proprietary, low dropout, inverting drivers that translate TTL/CMOS inputs to EIA/TIA-232 output levels. Coupled with the on-chip ±5.5V supplies, these transmitters deliver true RS-232 levels over a wide range of single supply system voltages. All transmitter outputs disable and assume a high impedance state when the device enters the powerdown mode (see Table 2). These outputs may be driven to ±12V when disabled. All devices guarantee a 250kbps data rate for full load conditions (3k Ω and 1000pF), VCC ≥ 3.0V, with one Input Resistance 25 3 5 7 k Ω TRANSMITTER OUTPUTS Output Voltage Swing All Transmitter Outputs Loaded with 3k Ω to Ground Full ±5.0 ±5.4 - V Output Resistance VCC = V+ = V- = 0V, Transmitter Output = ±2V Full 300 10M - Ω Output Short-Circuit Current Shorted to GND Full - - ±60 mA Output Leakage Current VOUT = ±12V, VCC = 0V or 3V to 5.5V, SHDN =GND Full - - ±25 μA TIMING CHARACTERISTICS Maximum Data Rate RL =3kΩ, CL = 1000pF, One Transmitter Switching Full 250 500 - kbps Receiver Propagation Delay Receiver Input to Receiver Output, CL = 150pF tPHL 25 - 0.15 - μs tPLH 25 - 0.15 - μs Receiver Output Enable Time 25 - 200 - ns Receiver Output Disable Time 25 - 200 - ns Transmitter Output Enable Time From SHDN Rising Edge to TOUT = ±3.7V 25 - 100 - μs Transmitter Skew tPHL - tPLH (Note 3) 25 - 100 - ns Receiver Skew tPHL - tPLH 25 - 50 - ns Transition Region Slew Rate RL =3kΩ to 7kΩ, Measured From 3V to -3V or -3V to 3V, VCC = 3.3V CL = 150pF to 1000pF 25 6 18 30 V/ μs CL = 150pF to 2500pF 25 4 13 30 V/ μs ESD PERFORMANCE RS-232 Pins (TOUT, RIN) Human Body Model 25 - ±15 - kV IEC61000-4-2 Air Gap Discharge 25 - ±15 - kV IEC61000-4-2 Contact Discharge 25 - ±8- kV NOTE: 3. Transmitter skew is measured at the transmitter zero crossing points. 4. 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. Electrical Specifications Test Conditions: VCC = 3V to 5.5V, C1 - C4 = 0.1μF, VL = VCC; Unless Otherwise Specified. Typicals are at TA = 25oC, VCC = VL = 3.3V (Continued) PARAMETER TEST CONDITIONS TEMP (oC) MIN (Note 4) TYP MAX (Note 4) UNITS ISL4260E |
同様の部品番号 - ISL4260EIRZ |
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同様の説明 - ISL4260EIRZ |
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