ST3243_06 STMICROELECTRONICS | Alldatasheet

Document overview

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Technical content

Datasheet sections

  • 1 Pin configuration
  • 1.1 Truth tables
  • 2 Maximum ratings
  • 3 Electrical characteristics
  • 4 Application circuits
  • 5 Typical performance characteristics
  • 6 Package mechanical data
  • 7 Revision history

Part number Temperature range Package Comments ST3243CDR 0 to 70 °C SO-28 (Tape & Reel) 1000 parts per reel ST3243CPR 0 to 70 °C SSOP-28 (Tape & Reel) 1350 parts per reel ST3243CTR 0 to 70 °C TSSOP28 (Tape & Reel) 2500 parts per reel ST3243BTR -40 to 85 °C TSSOP28 (Tape & Reel) 2500 parts per reel ST3243 3 to 5.5V, 400Kbps, RS-232 Transceiver with auto-powerdown General features I 1µA supply current achieved when in auto- powerdown I 250kbps minimum guaranteed data rate I Guaranteed 6V/µs slew rate range I Guaranteed mouse drive ability I 0.1µF external capacitors I Meet EIA/TIA-232 specifications down to 3V I Available in SO-28, SSOP-28 and TSSOP28

Description

The ST3243 device consists of 3 drivers, 5 receivers and a dual charge-pump circuit. The device meets the requirements of EIA/TIA and V.28/V.24 communication standards providing high data rate capability. The receiver R2 is always active to implement a wake-up feature for serial port. The ST3243 has a proprietary low-dropout transmitter output stage enabling true RS-232 performance from a 3.0V to 5.5V supply with a dual charge pump. The device is guaranteed to run at data rates of 250kbps while maintaining RS-232 output levels. The Auto-powerdown feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal, the driver outputs are disabled. If FORCEOFF is set low, both drivers and receivers (expert R2B) are shut off, and supply current is reduced to 1mA. Disconnecting the serial port or turning off the peripheral drives causes the auto-powerdown condition to occur. Auto-powerdown can be disabled when FORCEON and FORCEOFF are high, and should be done when driving a serial mouse. With Auto- powerdown enabled, the device is activated automatically when a valid signal is applied to any receiver input. Typical application are in notebook, subnotebook, palmtop computers, battery-powered equipment, hand-held equipment, peripherals and printers. SOP SSOP TSSOP

1 Pin configuration

Figure 1. Pin configuration Table 1. Pin description

10 T2 OUT Second transmitter output voltage

11 T3 OUT Third transmitter output voltage

12 T3 IN Third transmitter input voltage

13 T2 IN Second transmitter input voltage

14 T1 IN First transmitter input voltage

15 R5 OUT Fifth receiver output voltage

16 R4 OUT Fourth receiver output voltage

17 R3 OUT Third receiver output voltage

1.1 Truth table

18 R2 OUT Second receiver output voltage

19 R1 OUT First receiver output voltage

20 R2 OUTB Non-inverting complementary receiver output, always active for wake-up

23 FORCEON Drive high to override automatic circuitry keeping transmitters on

24 C 1- Negative terminal of voltage-charge pump capacitor

25 GND Ground

26 V CC Supply voltage

0 HIGH Z HIGH Z ACTIVE Note:

1 ACTIVE Note: ACTIVE Note: ACTIVE Note:

2 Maximum ratings

maximum magnitude of +7V, but their absolute addition can not exceed 13 V.

2 The device doesn’t meet 1KV ESD HBM

Table 3. Absolute maximum ratings

3 Electrical characteristics

Table 4. Electrical characteristics (C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Table 5. Logic input electrical characteristics (C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.

Table 6. Auto-powerdown electrical characteristics (C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Table 7. Transmitter electrical characteristics (C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified. Table 8. Receiver electrical characteristics (C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.

Table 9. Timing characteristics (C1 - C4 = 0.1µF, VCC = 3V to 5.5V, TA = -40 to 85°C, unless otherwise specified.

4 Application circuits

Figure 2. Application circuits Table 10. Capacitance value (µF)

5 Typical performance characteristics

Figure 3. Invalid high threshold time Figure 4. Invalid low threshold time Figure 5. Receiver propagation delay Figure 6. Receiver output enable & disable

6 Package mechanical data

In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com

/i13 DIM. mm. inch A 2.65 0.104 a1 0.1 0.3 0.004 0.012 b 0.35 0.49 0.014 0.019 b1 0.23 0.32 0.009 0.012 C 0.5 0.020 c1 45° (typ.) D 17.70 18.10 0.697 0.713 E 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 16.51 0.650 F 7.40 7.60 0.291 0.300 L 0.50 1.27 0.020 0.050 S° /i13 (max.) SO-28 MECHANICAL DATA/i13 0016023

DIM. mm. inch A 2 0.079 A1 0.050 0.002 b 0.22 0.38 0.009 0.015 c 0.09 0.25 0.004 0.010 e 0.65 BSC 0.0256 BSC K0 ° /i13 10°/i13 0°/i13 10°/i13 SSOP28 MECHANICAL DATA

DIM. mm. inch A 1.2 0.047 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0079 e 0.65 BSC 0.0256 BSC TSSOP28 MECHANICAL DATA 0128292B

DIM. mm. inch A 330 12.992 C 12.8 13.2 0.504 0.519 D 20.2 0.795 N 60 2.362 T 30.4 1.197 Ao 10.8 11.0 0.425 0.433 Bo 18.2 18.4 0.716 0.724 Ko 2.9 3.1 0.114 0.122 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 Tape & Reel SO-28 MECHANICAL DATA

DIM. mm. inch A 330 12.992 C 12.8 13.2 0.504 0.519 D 20.2 0.795 N 60 2.362 T 22.4 0.882 Ao 8.4 8.6 0.331 0.339 Bo 10.7 10.9 0.421 0.429 Ko 2.9 3.1 0.114 0.122 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 Tape & Reel SSOP28 MECHANICAL DATA

DIM. mm. inch A 330 12.992 C 12.8 13.2 0.504 0.519 D 20.2 0.795 N 60 2.362 T 22.4 0.882 Ao 6.8 7 0.268 0.276 Bo 10.1 10.3 0.398 0.406 Ko 1.7 1.9 0.067 0.075 Po 3.9 4.1 0.153 0.161 P 11.9 12.1 0.468 0.476 Tape & Reel TSSOP28 MECHANICAL DATA

7 Revision history

Table 11. Revision history 19-Sep-2004 6 Document updating. 31-Mar-2006 7 Order codes has been updated and new template.