SLLS792C June   2007  – December 2024 TRS3221E

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  ESD Ratings
    3. 5.3  ESD Ratings, IEC Specifications
    4. 5.4  Recommended Operating Conditions
    5. 5.5  Thermal Information
    6. 5.6  Electrical Characteristics
    7. 5.7  Driver Section Electrical Characteristics
    8. 5.8  Driver Section Switching Characteristics
    9. 5.9  Receiver Section Electrical Characteristics
    10. 5.10 Receiver Section Switching Characteristics
    11. 5.11 Auto-Powerdown Section Electrical Characteristics
    12. 5.12 Auto-Powerdown Section Switching Characteristics
    13. 5.13 Typical Characteristics
  7. 6 Parameter Measurement Information
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power
      2. 7.3.2 RS232 Driver
      3. 7.3.3 RS232 Receiver
      4. 7.3.4 RS232 Status
    4. 7.4 Device Functional Modes
  9. 8 Application Information Disclaimer
    1. 8.1 Application Information
    2. 8.2 Typical Application
    3. 8.3 Design Requirements
    4. 8.4 Detailed Design Procedure
    5. 8.5 Application Curve
    6.     Power Supply Recommendations
    7. 8.6 Layout
      1. 8.6.1 Layout Guidelines
      2. 8.6.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

4 Pin Configuration and Functions

TRS3221E 16-Pin SSOP (DB) or TSSOP (PW) Packages, Top View Figure 4-1 16-Pin SSOP (DB) or TSSOP (PW) Packages, Top View
TRS3221E 16-pin VQFN (RGT) Package, Top View Figure 4-2 16-pin VQFN (RGT) Package, Top View
Table 4-1 Pin Functions
PIN TYPE DESCRIPTION
NAME DB or PW RGT
C1+ 2 16 — Positive terminals of the voltage-doubler charge-pump capacitors
C2+ 5 2 —
C1– 4 1 — Negative terminals of the voltage-doubler charge-pump capacitors
C2– 6 3 —
DIN 11 8 I Driver input
DOUT 13 10 O RS-232 driver output
EN 1 14 I Low input enables receiver ROUT output. High input sets ROUT to high impedance.
FORCEOFF 16 13 I Automatic power-down control input
FORCEON 12 9 I Automatic power-down control input
GND 14 11 GND Ground
INVALID 10 7 O Invalid output pin. Output is low when all RIN inputs are unpowered.
RIN 8 5 I RS-232 receiver input
ROUT 9 6 O Receiver output
VCC 15 12 — 3V to 5.5V supply voltage
V+ 3 15 O 5.5V supply generated by the charge pump
V– 7 4 O –5.5V supply generated by the charge pump
Thermal Pad None Thermal Pad - Exposed thermal pad. Can be connected to GND or left floating.
TRS3221E DYY Package 16-Pin SOT-23-THN (Top View) Figure 4-3 DYY Package
16-Pin SOT-23-THN
(Top View)
Table 4-2 Pin Functions
PIN TYPE DESCRIPTION
NAME NO.
C1+ 2 — Positive terminals of the voltage-doubler charge pump capacitors
C2+ 5
C1– 4 — Negative terminals of the voltage-doubler charge pump capacitors
C2– 6
DIN 11 I Driver input
DOUT 13 O RS-232 driver output
EN 1 I Low input enables receiver ROUT output. High input sets ROUT to high impedance.
FORCEOFF 16 I Automatic power-down control input
FORCEON 12 I Automatic power-down control input
GND 14 — Ground
INVALID 10 O Invalid output pin. Output low when RIN input is unpowered.
RIN 8 I RS-232 receiver input
ROUT 9 O Receiver output
VCC 15 — 3V to 5.5V supply voltage
V+ 3 O 5.5V supply generated by the charge pump
V– 7 O –5.5V supply generated by the charge pump