MAX324 Maxim Integrated Products, MAX324 Datasheet
MAX324
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MAX324 Summary of contents
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... The MAX3221E, MAX3223E, and MAX3243E are avail- able in space-saving SSOP packages. Notebook, Subnotebook, and Palmtop Computers Cellular Phones ...
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ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown ABSOLUTE MAXIMUM RATINGS V to GND ..............................................................-0. GND (Note 1) ..................................................-0. GND (Note 1) ...................................................+0. ...
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... Input Threshold Low Input Threshold High Input Hysteresis Input Resistance TRANSMITTER OUTPUTS Output Voltage Swing Output Resistance Output Short-Circuit Current Output Leakage Current MOUSE DRIVEABILITY (MAX3243E) Transmitter Output Voltage ESD PROTECTION R_IN, T_OUT _______________________________________________________________________________________ = unless otherwise noted. Typical values are MIN ...
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... ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown TIMING CHARACTERISTICS—MAX3221E/MAX3223E/MAX3243E (V = +3.0V to +5.5V, C1–C4 = 0.1µF (Note 2 PARAMETER SYMBOL Maximum Data Rate t PHL Receiver Propagation Delay t PLH Receiver Output Enable Time Receiver Output Disable Time Transmitter Skew PHL Receiver Skew ...
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... TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE OUT TRANSMITTER AT 250kbps 2 2 TRANSMITTERS AT 15.6kbps OUT 1000 2000 3000 4000 5000 LOAD CAPACITANCE (pF) MAX3243E OPERATING SUPPLY CURRENT vs. LOAD CAPACITANCE 60 50 250kbps 40 120kbps 30 20kbps TRANSMITTING AT 250kbps T2 (MAX3223E) TRANSMITTING AT 15.6kbps 0 0 1000 2000 3000 4000 5000 LOAD CAPACITANCE (pF) 5 ...
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... CC Force-Off Input, active low. Drive low to shut down transmitters, FORCEOFF receivers (MAX3243E, except R2OUTB), and on-board charge pump. This overrides all automatic circuitry and FORCEON (Table 1). The transmitters are inverting level translators that con- vert CMOS-logic levels to 5.0V EIA/TIA-232 levels. They guarantee a 250kbps data rate with worst-case loads of 3kΩ ...
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... Rx THREE-STATED UART Tx GND FORCEOFF = GND b) NEW MAX3243E: IN SHUTDOWN, R2OUTB IS USED TO MONITOR EXTERNAL DEVICES AND R2OUT IS THREE STATED, ELIMINATING A CURRENT PATH THROUGH THE UART'S PROTECTION DIODE. CC Figure 2. The MAX3243E detects RS-232 activity when the UART and interface are shut down. PREVIOUS RS-232 ...
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... INVALID output that is enabled low when no valid RS-232 signal levels have been detected on all receiver inputs. INVALID is functional in any mode (Figures 3 and 5). The MAX3221E/MAX3223E/MAX3243E achieve a 1µA supply current with Maxim’s new AutoShutdown fea- ture, which operates when FORCEON is low and FORCEOFF is high ...
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... Figure 4 shows a circuit that forces the transmitters on for 100ms, allowing enough time for the other system to realize that the MAX3221E/MAX3223E/ MAX3243E are awake. If the other system transmits valid RS-232 signals within that time, the RS-232 ports on both systems remain enabled. ...
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... The IEC1000-4-2 standard covers ESD testing and per- formance of finished equipment; it does not specifi- cally refer to integrated circuits. The MAX3221E/ MAX3223E/MAX3243E help you design equipment that meets Level 4 (the highest level) of IEC1000-4-2, with- out the need for additional ESD-protection components. 50M to 100M ...
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ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown The major difference between tests done using the Human Body Model and IEC1000-4-2 is higher peak current in IEC1000-4-2, because series resistance is lower in the IEC1000-4-2 model. Hence, ...
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... Figure 10. Loopback Test Result at 120kbps 12 ______________________________________________________________________________________ High Data Rates The MAX3243E has been specifically designed to power serial mice while operating from low-voltage power sup- plies. It has been tested with leading mouse brands such as Logitech and Microsoft. When tested, the MAX3243E successfully drove all serial mice and met their respective current and voltage requirements. The MAX3243E’ ...
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... ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown +3.3V 0 C1 C1- 1 MAX3243E C2 C2- T1IN 14 T2IN LOGIC 13 INPUTS T3IN 12 R2OUTB 20 R1OUT 19 R2OUT 18 LOGIC OUTPUTS R3OUT 17 R4OUT 16 R5OUT 15 23 FORCEON FORCEOFF CC TO POWER- 21 INVALID MANAGEMENT GND UNIT Figure 12b. Mouse Driver Test Circuit ...
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... ESD-Protected, 1µA, 3.0V to 5.5V, 250kbps, RS-232 Transceivers with AutoShutdown Interconnection with 3V and 5V Logic The MAX3221E/MAX3223E/MAX3243E can directly inter- face with various 5V logic families, including ACT and Table 5. ±15kV ESD-Protected, 3.0V to 5.5V Powered RS-232 Transceivers from Maxim Supply No. Supply Voltage PART ...
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... OUTPUTS T2OUT 8 R1IN 16 RS-232 5k INPUTS R2IN 9 TO POWER- MANAGEMENT UNIT 5k TO POWER- INVALID 11 MANAGEMENT UNIT V CC Typical Operating Circuits +3. MAX3243E C2 C2- T1IN T1OUT 9 14 T2IN T2OUT 10 13 T3IN T3OUT 11 12 R2OUTB 20 R1OUT R1IN R2OUT R2IN R3OUT R3IN R4OUT 16 ...
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... Maxim Integrated Products TOP VIEW FORCEOFF V CC GND T1OUT FORCEON T1IN INVALID R1OUT C2 R1IN GND 25 4 R2IN C1 MAX3243E R3IN FORCEON 23 6 R4IN FORCEOFF 7 22 R5IN INVALID 21 8 T1OUT R2OUTB 9 20 T2OUT R1OUT 10 19 T3OUT R2OUT 11 18 T3IN R3OUT 12 17 T2IN R4OUT 13 ...