SLLSET7C May   2016  – May 2016 TRS3122E

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Characteristics
    5. 6.5  Power and Status Electrical Characteristics
    6. 6.6  Driver Electrical Characteristics
    7. 6.7  Receiver Electrical Characteristics
    8. 6.8  Driver Switching Characteristics
    9. 6.9  Receiver Switching Characteristics
    10. 6.10 Power and Status Switching Characteristics
    11. 6.11 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Charge Pump
        1. 8.3.1.1 Doubler Mode
        2. 8.3.1.2 Tripler Mode
      2. 8.3.2 Drivers
      3. 8.3.3 Receivers
      4. 8.3.4 ESD Protection
      5. 8.3.5 Auto Powerdown Plus
        1. 8.3.5.1 Automatic Powerdown
        2. 8.3.5.2 Manual Powerdown
        3. 8.3.5.3 Forced On
    4. 8.4 Device Functional Modes
      1. 8.4.1 Each Driver
      2. 8.4.2 Each Receiver
      3. 8.4.3 INVALID Status Truth Table
      4. 8.4.4 Capacitor Selection Table
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical 1.8-V Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Data-Rate and Cable Length
        2. 9.2.2.2 Capacitor Selection
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Device Support
      1. 12.1.1 Third-Party Products Disclaimer
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6 Specifications

6.1 Absolute Maximum Ratings(1)

over operating free-air temperature range (unless otherwise noted)
MIN MAX UNIT
VCC Charge pump power supply –0.3 6 V
VL Logic power supply –0.3 6 V
V+ Positive storage capacitor voltage –0.3 7 V
V– Negative storage capacitor voltage 0.3 –7 V
V+ + |V–|(2) 13 V
VI Input voltage FORCEOFF , FORCEON –0.3 6 V
DIN –0.3 VL + 0.3
RIN (0Ω series resistance) ±20
RIN (≥250Ω series resistance) ±25
VO Output voltage DOUT ±13.2 V
ROUT –0.3 VL + 0.3
TJ Junction temperature 150 °C
Tstg Storage temperature range –65 150 °C
(1) Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
(2) V+ and V– can have maximum magnitudes of 7 V, but their absolute difference cannot exceed 13 V.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins(1) All pins except RS-232 bus ±2000 V
RS-232 bus pins ±15000
Charged device model (CDM), per JEDEC specification JESD22-C101, all pins(2) All pins ±500
IEC 61000-4-2 Air-Gap Discharge RS-232 bus pins ±15000
IEC 61000-4-2 Contact Discharge ±8000
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.3 Recommended Operating Conditions

MIN TYP MAX UNIT
VCC Charge pump power supply Tripler Mode 1.65 1.8 2 V
Doubler Mode 3 3.3 3.6
4.5 5 5.5
VL Logic power supply 1.65 VCC V
RIN RS-232 Receiver interface -15 15 V
DOUT RS-232 Transmitter interface -12 12 V
VIL GPIO Input logic threshold low DIN, FORCEOFF, FORCEON VL = 5.0 V 0 1.7 V
VL = 3.3V 0 1.1
VL = 1.8 V 0 0.6
VIH GPIO Input logic threshold high DIN, FORCEOFF, FORCEON VL = 5.0V 3.3 VL V
VL = 3.3V 2.2 VL
VL = 1.8V 1.2 VL
VOZ ROUT disabled FORCEOFF = 0V 0 VL V
Operating temperature –40 85 °C

6.4 Thermal Characteristics

THERMAL METRIC TRS3122E UNIT
RGE
RθJA Junction-to-ambient thermal resistance 34.2 °C/W
RθJCtop Junction-to-case (top) thermal resistance 27.2
RθJB Junction-to-board thermal resistance 11.4
ψJT Junction-to-top characterization parameter 0.4
ψJB Junction-to-board characterization parameter 11.4
RθJC(bot) Junction-to-case (bottom) thermal resistance 3.6

6.5 Power and Status Electrical Characteristics

VCC = VL = (1.65 V to 2.0 V) & (3.0V to 5.5V), TA = -40°C to 85°C (unless otherwise noted). Typical data is TA = 25°C, VCC = VL = 3.3V unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Icc (Static) DIN1 = GND or VL; DIN2 = GND or VL, FORCEOFF = VL FORCEON = VL No load VCC= 1.65V to 2.0V 1.0 1.9 mA
VCC= 3.0V to 3.6V 0.7 1.4
VCC= 4.5V to 5.5V 0.8 1.9
Icc (off) FORCEOFF = GND 0.4 10 μA
VIT+ RIN postive voltage threshold for INVALID output change RIN1 = RIN2 0.3 2.4 V
VIT- RIN negative voltage threshold for INVALID output change -2.4 -0.3
VOH INVALID high-level output voltage IOH = -1 mA, FORCEON = GND, FORCEOFF = VL VL-0.4 VL-0.08 VL V
VOL INVALID low-level output voltage IOL = 1.6 mA, FORCEON = GND, FORCEOFF = VL 0 0.06 0.4 V

6.6 Driver Electrical Characteristics

VCC = VL = (1.65 V to 2.0 V) & (3.0V to 5.5V), TA = -40°C to 85°C (unless otherwise noted). Typical data is TA = 25°C, VCC = VL = 3.3V unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VOUT Output voltage swing All driver outputs loaded with 3 kΩ to ground
C3 = 100 nF, VCC= 1.8 V 		±4.25 ±4.7 V
All driver outputs loaded with 3 kΩ to ground
C3 = 0 F, VCC= 3.3 V or 5 V		 ±5 ±5.4
rO Output resistance (VCC = V+ = V–  = 0); Driver output = ±2 V 300 10M Ω
IOS Output short-circuit current VDOUT = 0 ±60 mA
IOZ Output leakage current VDOUT = ±12 V, FORCEOFF = GND 0 ±25 μA
Driver input hysteresis 0.5 1 V
Input leakage current DIN = GND to VL; FORCEOFF = GND to VL; FORCEON = GND to VL 0 ±5 μA

6.7 Receiver Electrical Characteristics

VCC = VL = (1.65 V to 2.0 V) & (3.0V to 5.5V), TA = -40°C to 85°C (unless otherwise noted). Typical data is TA = 25°C, VCC = VL = 3.3V unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Ioff Output leakage current ROUT, receivers disabled ±0.01 ±10 μA
VOL Output voltage low IOUT= 2.0 mA 0.04 0.3 V
VOH Output voltage high IOUT= –2.0mA VL–0.3 VL–0.04 V
VIT– Input threshold low TA=25°C VL= 5 V 0.8 1.5 V
VL= 3.3 V 0.7 1.1
VL= 1.8 V 0.6 0.7
VIT+ Input threshold high TA =25°C VL= 5 V 2.0 2.4 V
VL = 3.3 V 1.5 2.4
VL= 1.8 V 0.9 1.4
Vhys Input hysteresis TA=25°C VL= 5 V 0.45 V
VL = 3.3 V 0.35
VL= 1.8 V 0.26
Input resistance TA=-40 to 85°C 3 5 7 kΩ

6.8 Driver Switching Characteristics

VCC = VL = (1.65 V to 2.0 V) & (3.0V to 5.5V), TA = -40°C to 85°C (unless otherwise noted). Typical data is TA = 25°C, VCC = VL = 3.3V unless otherwise noted.
PARAMETER MIN TYP MAX UNIT
Maximum data rate RL = 3 kΩ, CL = 500 pF (one driver) 1000 kbps
RL = 3 kΩ, CL = 1000 pF (one driver) 500
Time-to-exit powerdown |VDOUT| > 3.7 V 30 150 μs
|tPHL – tPLH| Driver skew(1) RL = 3 kΩ 0 50 100 ns
Transition-region slew rate RL = 3 kΩ to 7 kΩ,
TA = 25°C
Measured from 3 V to –3 V
or –3 V to 3 V 		VCC = 1.8V, CL = 200 pF 33 V/μs
VCC = 1.8V, CL = 1000 pF 25
VCC = 3.3 V, CL = 200 pF 38
VCC = 3.3 V, CL = 1000 pF 28
VCC = 5 V, CL = 200 pF 41
VCC = 5 V, CL = 1000 pF 30
(1) Driver skew is measured at the driver zero crosspoint.

6.9 Receiver Switching Characteristics

VCC = VL = (1.65 V to 2.0 V) & (3.0V to 5.5V), TA = -40°C to 85°C (unless otherwise noted). Typical data is TA = 25°C, VCC = VL = 3.3V unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
tPHL Receiver propagation delay, high to low Receiver input to receiver output
CL = 150 pF 		0.15 0.4 μs
tPLH Receiver propagation delay, low to high 0.15 0.4
tPHL – tPLH Receiver skew 50 300 ns
ten Receiver output enable time From FORCEOFF to ROUT= VL/2
CL = 150 pF, RL = 3 kΩ		 200 400 ns
tdis Receiver output disable time 200 400 ns

6.10 Power and Status Switching Characteristics

VCC = VL = (1.65 V to 2.0 V) & (3.0V to 5.5V), TA = -40°C to 85°C (unless otherwise noted). Typical data is TA = 25°C, VCC = VL = 3.3V unless otherwise noted.
PARAMETER MIN TYP MAX UNIT
tvalid Propagation delay time, low- to high-level output 1 μs
tinvalid Propagation delay time, high- to low-level output 30 μs
tdis Receiver or driver edge to auto-powerdown plus 15 30 60 s

6.11 Typical Characteristics

TRS3122E C005_.png Figure 1. Supply Current vs. Load Capacitance
VCC = 3.3 V, VL = 1.8 V, RLOAD = 3 kΩ, CH2 = 32 kbps
TRS3122E C002_.png Figure 3. Driver Positive vs. Supply Voltage (Tripler Mode)
1 Mbps, RLOAD = 3 kΩ, CLOAD = 560 pF
TRS3122E C006_.png Figure 5. Supply Current vs. Supply Voltage (Tripler Mode)
VL = 1.8 V, RLOAD = 3 kΩ, CLOAD = 1 nF, CH2 = 32 kbps
TRS3122E C004_.png Figure 2. Driver Output vs. Load Capacitance, VCC = 3.3V
VL = 1.8V, RLOAD = 3 kΩ, CH1 = 1 Mbps, CH2 = 32 kbps
TRS3122E C003_.png Figure 4. Driver Positive vs. Supply Voltage (Doubler Mode)
1 Mbps, RLOAD = 3 kΩ, CLOAD = 560 pF
TRS3122E C007_.png Figure 6. Supply Current vs. Supply Voltage (Doubler Mode)
VL = 1.8 V, RLOAD = 3 kΩ, CLOAD = 1 nF, CH2 = 32 kbps