ISL4245E INTERSIL [Intersil Corporation], ISL4245E Datasheet
ISL4245E
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ISL4245E Summary of contents
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... Data Sheet QFN Packaged, ±15kV ESD Protected, +2.7V to +5.5V, 10Nanoamp, 250kbps/ 1Mbps, RS-232 Transceivers with Enhanced Automatic Power-down The Intersil ISL4238E, ISL4244E and ISL4245E devices are 2.7V to 5.5V powered RS-232 transmitters/receivers which meet ElA/TIA-232 and V.28/V.24 specifications, even 3.0V. Additionally, they provide ±15kV ESD protection CC (IEC61000-4-2 Air Gap and Human Body Model) on transmitter outputs and receiver inputs (RS-232 pins) ...
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... 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. 2 ISL4238E, ISL4244E, ISL4245E TABLE 1. SUMMARY OF FEATURES NO. OF MONITOR Rx ...
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... Exposed Thermal Pad. Connect to GND. NOTE: ISL4238E input pins incorporate positive feedback resistors. Once the input is driven to a valid logic level, the feedback resistor maintains that logic level until V is removed. Unused transmitter inputs may be left unconnected by the user ISL4238E, ISL4244E, ISL4245E C1- R1 ...
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... Typical Operating Circuits (NOTE) TTL/CMOS LEVELS NOTE: For V = 3.15V (3.3V -5%), use ISL4238E, ISL4244E, ISL4245E ISL4238E +3.3V + 0.1µ C1 0.1µ C2+ + 0.1µ C2 LOGIC 14 R1 ...
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... Typical Operating Circuits TTL/CMOS LOGIC LEVELS CONTROL LOGIC 5 ISL4238E, ISL4244E, ISL4245E (Continued) ISL4244E, ISL4245E +3.3V + 0.1µ C1 0.1µ C2+ + 0.1µ C2 OUTB 18 R1 OUT R 1 5kΩ OUT ...
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... CC Output Short-Circuit Current Output Leakage Current V OUT Automatic Power-down or FORCEOFF = GND 6 ISL4238E, ISL4244E, ISL4245E Thermal Information Thermal Resistance (Typical, Notes QFN Package Moisture Sensitivity (see Technical Brief TB363) QFN Package Level 1 Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Pb-Free Reflow Profile .see link below http://www ...
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... Transmitter Propagation Delay Transmitter Input to ISL4245E Transmitter Output 1000pF Transmitter Skew ISL4245E t PHL Receiver Output Enable Time Normal Operation ISL4238E, ISL4244E, ISL4245E = 3.15V to 5.5V 5.5V 0.1µF; Unless Otherwise Specified. Typicals are TEST CONDITIONS CC = 1.6mA = -1.0mA ...
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... Under more typical CC conditions of V transmitter easily operates at 1Mbps. The ISL4245E guarantees a 1Mbps data rate for full load conditions (3kΩ and 250pF), V transmitter operating at full speed. Under more typical conditions of V transmitter easily operates at 1.4Mbps. Transmitter inputs on the ISL424XE float if left unconnected, ...
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... Ring Indicator monitoring. Standard receivers driving powered down peripherals must be disabled to prevent current flow through the peripheral’s protection diodes (see Figures 2 and 3). This 9 ISL4238E, ISL4244E, ISL4245E TABLE 2. POWER-DOWN LOGIC TRUTH TABLE TRANSMITTER RECEIVER R OUTB ...
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... Connecting FORCEOFF and FORCEON together disables the enhanced automatic power-down feature, enabling them to function as a manual SHUTDOWN input (see Figure 4). With any of the previous mentioned control schemes, the time required to exit power-down, and resume transmission is only 100µs. 10 ISL4238E, ISL4244E, ISL4245E ISL4238E ISL4244E ISL4245 OUT FIGURE 4 ...
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... Note that once the ISL4238E, ISL4244E, ISL4245 enters power-down (manually or automatically), the 30 second timer remains timed out (set), keeping the ISL4238E, ISL4244E, ISL4245 powered down until FORCEON transitions high, or until a transition occurs on a receiver or transmitter input. 11 ISL4238E, ISL4244E, ISL4245E EDGE T_IN DETECT EDGE R_IN DETECT FIGURE 7 ...
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... The ISL4244E/45E charge pumps require 0.1 for proper operation. Increasing the capacitor values (by a factor of 2) reduces ripple on the transmitter outputs and 12 ISL4238E, ISL4244E, ISL4245E AUTOPWDN slightly reduces power consumption. C increased without increasing C increase C maintain the proper ratios (C When using minimum required capacitor values, make sure that capacitor values do not degrade excessively with temperature ...
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... Figure 14 shows the ISL4238E/ISL4244E loopback results for a single transmitter driving 1000pF and an RS-232 load at 250kbps. Figure 15 illustrates the ISL4245E loopback test result at 250kbps. For this test, all transmitters were simultaneously driving RS-232 loads in parallel with 1000pF, at 250kbps. Figure 16 shows the ...
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... OUT R1 OUT V = +3. 0.1µF 2µs/DIV. FIGURE 15. ISL4245E LOOPBACK TEST AT 250kbps 5V/DIV OUT R1 OUT V = +3. 0.1µF 0.5µs/DIV. FIGURE 16. ISL4245E LOOPBACK TEST AT 1Mbps (C = 250pF) L Interconnection with 3V and 5V Logic The ISL4238E, ISL4244E, ISL4245 directly interface with 5V CMOS and TTL logic families. Nevertheless, with the ISL4238E, ISL4244E, ISL4245 at 3 ...
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... FIGURE 17. ISL4238E TRANSMITTER OUTPUT VOLTAGE vs LOAD CAPACITANCE TRANSMITTER AT 1Mbps OTHER TRANSMITTERS AT 30kbps 1000 2000 3000 LOAD CAPACITANCE (pF) FIGURE 19. ISL4245E TRANSMITTER OUTPUT VOLTAGE vs LOAD CAPACITANCE 45 1 TRANSMITTER AT INDICATED RATE 1000 2000 3000 LOAD CAPACITANCE (pF) FIGURE 21 ...
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... ISL4238E, ISL4244E, ISL4245E V = 3.3V +25°C (Continued 110 4000 5000 FIGURE 24. ISL4245E SLEW RATE vs LOAD CAPACITANCE Die Characteristics SUBSTRATE AND QFN THERMAL PAD POTENTIAL NO LOAD (POWERED UP): ALL OUTPUTS STATIC GND TRANSISTOR COUNT ISL4238E: 1235 ISL4244E: 1109 ISL4245E: 1109 PROCESS Si Gate BiCMOS 5.0 5 ...
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... LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 2, 11/07 5.00 6 PIN 1 INDEX AREA (4X) 0.15 TOP VIEW ( 4. 80 TYP ) ( TYPICAL RECOMMENDED LAND PATTERN 17 ISL4238E, ISL4244E, ISL4245E ± 0.1 ( 28X (32X 32X 0 . 60) NOTES: 1. Dimensions are in millimeters. Dimensions Dimensioning and tolerancing conform to AMSE Y14.5m-1994. 3. ...