isl3232e Intersil Corporation, isl3232e Datasheet
isl3232e
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isl3232e Summary of contents
Page 1
... Data rates greater than 250kbps are guaranteed at worst case load conditions. The ISL4221E driver, 1 receiver device and the ISL3232E and ISL4223E are 2 driver, 2 receiver devices that, coupled with the 5mmx5mm QFN package, provide the industry’s smallest, lowest power serial port suitable for PDAs, and hand-held applications ...
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... ISL3232E (16 LD QFN) TOP VIEW C1- 1 C2 ISL3232E, ISL4221E, ISL4223E TEMP. RANGE (°C) - QFN (Pb-free) - QFN - QFN (Pb-free) - QFN - QFN (Pb-free) 12 T1OUT 11 R1IN 10 R1OUT 9 T1IN ...
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... FORCEOFF Active low to shut down transmitters and on-chip power supply. This overrides any automatic circuitry and FORCEON (see Table 2). FORCEON Active high input to override automatic power-down circuitry thereby keeping transmitters active. (FORCEOFF must be high). EN Active low receiver enable control. Typical Operating Circuits TTL/CMOS LOGIC LEVELS 3 ISL3232E, ISL4221E, ISL4223E FUNCTION ISL3232E +3.3V + 0.1µ ...
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... Typical Operating Circuits TTL/CMOS LOGIC LEVELS TTL/CMOS LOGIC LEVELS 4 ISL3232E, ISL4221E, ISL4223E ISL4221E +3.3V + 0.1µ C1 0.1µ 0.1µ C2 OUT 5kΩ FORCEOFF 10 8 FORCEON INVALID GND 12 ISL4223E +3.3V + 0.1µ ...
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... Operating Conditions +0.3V CC Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85° 5.5V, C through +25°C A TEST CONDITIONS Open, FORCEON = GND, FORCEOFF = V IN (Except ISL3232E) FORCEOFF = GND (Except ISL3232E) All Outputs Unloaded 3.15V CC FORCEON = FORCEOFF = FORCEON, FORCEOFF FORCEON, FORCEOFF 3. ...
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... Automatic Power-down or FORCEOFF = GND R = 3kΩ 1000pF, One Transmitter Switching L L Receiver Input to Receiver t PHL Output 150pF L t PLH Normal Operation (Except ISL3232E) Normal Operation (Except ISL3232E (Note 2) PHL PLH PHL PLH V = 3.3V 3kΩ to 7kΩ 150pF to CC ...
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... Detailed Description The ISL4221E, ISL4223E and ISL3232E operate from a single +2.7V to +5.5V supply, guarantee a 250kbps minimum data rate, require only four small external 0.1µF capacitors, feature low power consumption, and meet all ElA RS-232C and V.28 specifications even with V CC divided into three sections: The charge pump, the transmitters and the receivers ...
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... TABLE 2. POWER-DOWN AND ENABLE LOGIC TRUTH TABLE (EXCLUDING ISL3232E) RS-232 SIGNAL PRESENT AT FORCEOFF RECEIVER INPUT? INPUT YES H YES YES L YES Low Power Operation These 3V devices require a nominal supply current of 0.3mA, even 5.5V, during normal operation (not in CC power-down mode) ...
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... V- FIGURE 7. AUTOMATIC POWER-DOWN AND INVALID TIMING DIAGRAMS Automatic Power-down (Excluding ISL3232E) Even greater power savings is available by using the automatic power-down function. When no valid RS-232 voltages (see Figure 6) are sensed on any receiver input for 30µs, the charge pump and transmitters power-down, thereby reducing supply current to 150nA. Invalid receiver levels occur whenever the driving peripheral’ ...
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... RS-562 levels typically ensure inter operability with RS-232 devices. High Data Rates The ISL4221E, ISL4223E and ISL3232E maintain the RS- 232 ±5V minimum transmitter output voltages even at high data rates. Figure 9 details a transmitter loopback test circuit, and Figure 10 illustrates the loopback test result at 120kbps ...
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... Interconnection with 3V and 5V Logic The ISL4221E, ISL4223E and ISL3232E directly interface with 5V CMOS and TTL logic families. Nevertheless, with the ISL4221E, ISL4223E and ISL3232E at 3.3V, and the logic supply at 5V, AC, HC, and CD4000 outputs can properly drive ISL4221E, ISL4223E and ISL3232E inputs, but ...
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... LOAD CAPACITANCE (pF) FIGURE 14. SUPPLY CURRENT vs LOAD CAPACITANCE WHEN TRANSMITTING DATA 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 2.5 3.0 3.5 4.0 4.5 SUPPLY VOLTAGE (V) FIGURE 16. SUPPLY CURRENT vs SUPPLY VOLTAGE 12 ISL3232E, ISL4221E, ISL4223E V = 3.3V +25° OUT OUT 4000 5000 250kbps 30 25 120kbps ...
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... Quad Flat No-Lead Plastic Package (QFN) Micro Lead Frame Plastic Package (MLFP) 13 ISL3232E, ISL4221E, ISL4223E L16.5x5B 16 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE (COMPLIANT TO JEDEC MO-220VHHB ISSUE C) SYMBOL θ NOTES: 1. Dimensioning and tolerancing conform to ASME Y14.5-1994. ...
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... 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 14 ISL3232E, ISL4221E, ISL4223E L20.5x5 20 LEAD QUAD FLAT NO-LEAD PLASTIC PACKAGE SYMBOL ...