3 to 5.5 V, low-power, up to 400 kbps RS-232 drivers and receivers

Document overview

  • Manufacturer or author: STMICROELECTRONICS
  • PDF pages: 18

Technical content

Datasheet sections

  • 1 Pin configuration
  • 2 Absolute maximum ratings
  • 3 Electrical characteristics
  • 4 Application information
  • 5 Typical performance characteristics
  • 6 Package information
  • 6.1 SO16 package information
  • 6.2 SO16L package information
  • 6.3 TSSOP16 package information
  • 6.4 SO16 tape and reel package information
  • 6.5 SO16L tape and reel package information
  • 6.6 TSSOP16 tape and reel package information
  • 7 Revision history

Features

300 µA supply current 300 kbps minimum guaranteed data rate

6 V/µs minimum guaranteed slew rate

Meets EIA/TIA-232 specifications down to 3 V Available in SO16, SO16L, and TSSOP16 packages

Description

The ST3232B and ST3232C devices are 3 V powered EIA/TIA-232 and V.28/V.24 communication interfaces with low power requirements and high data-rate capabilities. These devices have a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5.5 V supplies. The devices require only four small 0.1 mF standard external capacitors for operation from a 3 V supply. The ST3232B and ST3232C have two receivers and two drivers. The devices are guaranteed to run at data rates of 250 kbps while maintaining RS-232 output levels. Typical applications are notebooks, subnotebooks and palmtop computers, battery- powered equipment, hand-held equipment, peripherals, and printers. Table 1: Device summary Order code Temp. range Package Packaging ST3232CDR 0 to 70 °C SO16 (tape and reel) 2500 parts per reel ST3232BDR -40 to 85 °C ST3232CWR 0 to 70 °C SO16L (tape and reel) 1000 parts per reel ST3232BWR -40 to 85 °C ST3232CTR 0 to 70 °C TSSOP16 (tape and reel) 2500 parts per reel ST3232BTR -40 to 85 °C

ST3232B, ST3232C Pin configuration

1 Pin configuration

Figure 1: Pin connections Table 2: Pin description Pin n° Symbol Name and function

1 C1+ Positive terminal for the first charge pump capacitor

2 V+ Doubled voltage terminal

3 C1- Negative terminal for the first charge pump capacitor

4 C2+ Positive terminal for the second charge pump capacitor

5 C2- Negative terminal for the second charge pump capacitor

6 V- Inverted voltage terminal

7 T2OUT Second transmitter output voltage

8 R2IN Second receiver input voltage

9 R2OUT Second receiver output voltage

10 T2IN Second transmitter input voltage

11 T1IN First transmitter input voltage

12 R1OUT First receiver output voltage

13 R1IN First receiver input voltage

14 T1OUT First transmitter output voltage

15 GND Ground

16 VCC Supply voltage

2 Absolute maximum ratings

Table 3: Absolute maximum ratings Symbol Parameter Value Unit VCC Supply voltage -0.3 to 6 V V+ Doubled voltage terminal (VCC - 0.3) to 7 V- Inverted voltage terminal 0.3 to -7 V+ + |V-| TIN Transmitter input voltage range -0.3 to 6 RIN Receiver input voltage range ±25 TOUT Transmitter output voltage range ±13.2 ROUT Receiver output voltage range -0.3 to (VCC + 0.3) tSHORT Transmitter output short to gnd time Continuous Tstg Storage temperature -65 to 150 °C Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Externally applied V+ and V- can have a maximum magnitude of +7 V, but their absolute addition can not exceed 13 V. Running on internal charge pump, intrinsic self limitation allows exceeding those values without any damage. Startup voltage sequence (VCC, then V+, then V-) is critical, therefore it is not recommended to use this device using externally applied voltage to V+ and V -.

3 Electrical characteristics

Table 4: Electrical characteristics (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions Min. Typ. Max. Unit ISUPPLY VCC power supply current No load, VCC = 3 V ± 10 %, TA = 25 °C 0.3 1 mA No load, VCC = 5 V ± 10 %, TA = 25 °C 1 2 Table 5: Logic input (C1 - C4 = 0.1 µF, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions Min. Typ. Max. Unit VTIL Input logic threshold low T-IN (1) 0.8 V VTIH Input logic threshold high VCC = 3.3 V 2 VCC = 5 V 2.4 IIL Input leakage current T-IN ±0.01 ±1 µA Notes: (1)Transmitter input hysteresis is typically 250 mV. Table 6: Transmitter (C1 - C4 = 0.1 µF tested at 3.3 V ±10 %, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions Min. Typ. Max. Unit VTOUT Output voltage swing All transmitter outputs are loaded with 3 kΩ to GND ±5 ±5.4 V RTOUT Transmitter output resistance VCC = V+ = V- = 0 V, VOUT = ±2 V 300 10 M Ω ITSC Output short circuit current VCC = 3 V or 5 V, VOUT = ±12 ± 60 mA Table 7: Receiver (C1 - C4 = 0.1 µF tested at 3.3 V ±10 %, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions Min. Typ. Max. Unit VRIN Receiver input voltage operating range -25 V VRIL RS-232 Input threshold low TA = 25 °C, VCC = 3.3 V 0.6 1.1 TA = 25 °C, VCC = 5 V 0.8 1.5 VRIH RS-232 Input threshold high TA = 25 °C, VCC = 3.3 V 1.5 2.4 TA = 25 °C, VCC = 5 V 1.8 2.4 VRIHYS Input hysteresis 0.3 RRIN Input resistance TA = 25 °C 3 5 7 kΩ VROL TTL/CMOS output voltage low IOUT = 1.6 mA 0.4 V VROH TTL/CMOS output voltage high IOUT = -1 mA VCC - 0.6 VCC - 0.1

Table 8: Timing characteristics (C1 - C4 = 0.1 µF tested at 3.3 V ±10 %, VCC = 3 V to 5.5 V, TA = -40 to 85 °C, unless otherwise specified. Typical values are referred to TA = 25 °C) Symbol Parameter Test conditions Min. Typ. Max. Unit DR Data transfer rate RL = 3 kΩ, CL2 = 1000 pF one transmitter switching 300 400 kbps tPHLR, tPLHR Propagation delay input to output RXIN = RXOUT, CL = 150 pF 0.2 µs |tPHLT - tTHL| Transmitter propagation delay difference See (1) 100 ns |tPHLR - tTHR| Receiver propagation delay difference SRT Transition slew rate TA = 25 °C, RL = 3 kΩ to 7 kΩ, VCC = 3.3 V measured from 3 V to -3 V or -3 V to 3 V, CL = 150 pF to 1000 pF V/µs TA = 25 °C, RL = 3 kΩ to 7 kΩ, VCC = 3.3 V measured from 3 V to -3 V or -3 V to 3 V, CL = 150 pF to 2500 pF Notes: (1)Transmitter skew is measured at the transmitter zero cross points

4 Application information

Figure 2: Application circuits Table 9: Capacitance value (µF) VCC C1 C2 C3 C4 Cbypass

Typical performance characteristics ST3232B, ST3232C

5 Typical performance characteristics

Unless otherwise specified TJ = 25 °C Figure 3: Driver voltage transfer characteristics for transmitter inputs Figure 4: Driver voltage transfer characteristics for receiver inputs Figure 5: Output current vs output low voltage at VCC = 5.5 V Figure 6: Output current vs output low voltage at VCC = 3 V

6 Package information

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK ® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark.

6.1 SO16 package information

Figure 10: SO16 package outline Table 10: SO16 mechanical data Ref Dimensions Millimeters Inches A 1.75 0.068 a1 0.1 0.25 0.004 0.010 1.64 0.063 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 45 ° 45 ° D 9.8 10 0.385 0.393 E 5.8 6.2 0.228 0.244 e 1.27 0.050 8.89 0.350 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M 0.62 0.024 S 8 ° 8 °

6.2 SO16L package information

Figure 11: SO16L package outline Table 11: SO16L mechanical data Ref Dimensions Millimeters Inches A 2.35 2.65 0.093 0.104 A1 0.1 0.3 0.004 0.012 B 0.33 0.51 0.013 0.02 C 0.23 0.32 0.009 0.013 D 10.1 10.5 0.398 0.413 E 7.4 7.6 0.291 0.299 e 1.27 0.05 H 10 10.65 0.394 0.419 h 0.25 0.75 0.01 0.03 L 0.4 1.27 0.016 0.05 k 0 ° 8 ° 0 ° 8 ° ddd 0.1 0.004

6.3 TSSOP16 package information

Figure 12: TSSOP16 package outline Table 12: TSSOP16 mechanical data Ref Dimensions Millimeters Inches Min Typ Max Min Typ Max A 1.20 0.047 A1 0.05 0.15 0.002 0.006 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.008 e 0.65 0.026 k 0° 8° 0° 1.00 0.039 aaa 0.10 0.004

6.4 SO16 tape and reel package information

Figure 13: SO16 tape and reel package outline 1. Drawing not to scale Table 13: SO16 tape and reel mechanical data Ref Dimensions Millimeters Inches 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 6.45 6.65 0.254 0.262 Bo 10.3 10.5 0.406 0.414 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319

6.5 SO16L tape and reel package information

Figure 14: SO16L tape and reel package outline 1. Drawing not to scale Table 14: SO16L tape and reel mechanical data Ref Dimensions Millimeters Inches 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 10.8 11.0 0.425 0.433 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

6.6 TSSOP16 tape and reel package information

Figure 15: TSSOP16 tape and reel package outline 1. Drawing not to scale Table 15: TSSOP16 tape and reel mechanical data Ref Dimensions Millimeters Inches 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 6.7 6.9 0.264 0.272 Bo 5.3 5.5 0.209 0.217 Ko 1.6 1.8 0.063 0.071 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319

7 Revision history

Table 16: Document revision history Date Revision Changes 06-Sep-2006 8 Order codes has been updated and new template. 25-Oct-2006 9 Order codes has been updated. 21-Jan-2008 10 Added note on Table 3. 08-Feb-2008 11 Modified: Table 1 on page 1. 25-Jan-2016 12 Updated document layout Table 3: "Absolute maximum ratings": added Tstg Updated titles of Figure 5, Figure 6, Figure 7, and Figure 8 Section 6.2: replaced SO16L package outline and mechanical data Section 6.3: removed A1 (typ: inches), updated E1 (max: mm and inches), added L1 and aaa.