SNLS374D May   1998  – January 2015 DS8921

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 Electrical Characteristics
    5. 6.5 Receiver Switching Characteristics
    6. 6.6 Driver Switching Characteristics: Single-Ended Characteristics
    7. 6.7 Driver Switching Characteristics: Differential Characteristics
    8. 6.8 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 AC Test Circuits and Switching Diagrams
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      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 Related Links
    2. 12.2 Trademarks
    3. 12.3 Electrostatic Discharge Caution
    4. 12.4 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)(2)

MIN MAX UNIT
Supply Voltage 7 V
Driver Input Voltage −0.5 7 V
Output Voltage 5.5 V
Receiver Output Sink Current 50 mA
Receiver Input Voltage –10 10 V
Differential Input Voltage –12 12 V
Maximum Package Power Dissipation at 25°C: D Package 730 mW
 Maximum Package Power Dissipation at 25°C: P Package 1160 mW
Derate D Package, above 25°C 9.3 mW/°C
Derate P Package, above 25°C 5.8 mW/°C
Lead Temperature 260 °C
 (Soldering, 4 sec.) 260 °C
Maximum Junction Temperature 150 °C
Storage Temperature, Tstg −65 165 °C
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instrument Sales Office/ Distributors for availability and specifications.

6.2 ESD Ratings

VALUE UNIT
V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±1500
(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 MAX UNIT
Supply Voltage 4.5 5.5 V
 Temperature (TA): DS8921/DS8921A 0 70 °C
 Temperature (TA): DS8921AT −40 85 °C

6.4 Electrical Characteristics

Over operating free-air temperature range unless otherwise noted.(1)(2)(3)
TEST CONDITIONS MIN TYP MAX UNIT
RECEIVER
VTH −7 V ≤ VCM ≤ +7 V −200 ±35 +200 mV
VHYST −7 V ≤ VCM ≤ +7 V 15 70 mV
RIN VIN = −7 V, +7 V, (Other Input = GND) 4.0 6.0 kΩ
IIN VIN = 10 V 3.25 mA
VIN = −10 V −3.25 mA
VOH IOH = −400 μA 2.5 V
VOL IOL = 8 mA 0.5 V
ISC VCC = MAX, VOUT = 0 V −15 −100 mA
DRIVER
VIH 2.0 V
VIL 0.8 V
IIL VCC = MAX, VIN = 0.4 V −40 −200 μA
IIH VCC = MAX, VIN = 2.7 V 20 μA
II VCC = MAX, VIN = 7.0 V 100 μA
VCL VCC = MIN, IIN = −18 mA −1.5 V
VOH VCC = MIN, IOH = −20 mA 2.5 V
VOL VCC = MIN, IOL = +20 mA 0.5 V
IOFF VCC = 0V, V OUT = 5.5 V 100 μA
|VT| – |VT| 0.4 V
VT 2.0 V
|VOS – VOS| 0.4 V
ISC VCC = MAX, VOUT = 0 V −30 −150 mA
DRIVER AND RECEIVER
ICC VCC = MAX, VOUT = Logic 0 35 mA
(1) All currents into device pins are shown as positive values; all currents out of the device are shown as negative; all voltages are referenced to ground unless otherwise specified. All values shown as max or min are classified on absolute value basis.
(2) All typical values are VCC = 5 V, TA = 25°C.
(3) Only one output at a time should be shorted.

6.5 Receiver Switching Characteristics

TEST CONDITIONS MIN TYP MAX
8921		 MAX
8921A		 MAX
8921AT		 UNIT
tpLH CL = 30 pF 14 22.5 20 20 ns
(Figure 3 and Figure 4)
tpHL CL = 30 pF 14 22.5 20 20 ns
(Figure 3 and Figure 4)
|tpLH–t pHL| CL = 30 pF 0.5 5 3.5 5 ns
(Figure 3 and Figure 4)

6.6 Driver Switching Characteristics: Single-Ended Characteristics

TEST CONDITIONS MIN TYP MAX
8921		 MAX
8921A		 MAX
8921AT		 UNIT
tpLH CL = 30 pF 10 15 15 15 ns
(Figure 5 and Figure 6)
tpHL CL = 30 pF 10 15 15 15 ns
(Figure 5 and Figure 6)
tTLH CL = 30 pF 5 8 8 9.5 ns
(Figure 9 and Figure 10)
tTHL CL = 30 pF 5 8 8 9.5 ns
(Figure 9 and Figure 10)
Skew CL = 30 pF(1) 1 5 3.5 3.5 ns
(Figure 5 and Figure 6)
(1) Difference between complementary outputs at the 50% point.

6.7 Driver Switching Characteristics: Differential Characteristics(1)

TEST CONDITIONS MIN TYP MAX
8921		 MAX
8921A		 MAX
8921AT		 UNIT
tpLH CL = 30 pF 10 15 15 15 ns
(Figure 5, Figure 7, and Figure 8)
tpHL CL = 30 pF 10 15 15 15 ns
(Figure 5, Figure 7, and Figure 8)
|tpLH–t pHL| CL = 30 pF 0.5 6 2.75 2.75 ns
(Figure 5, Figure 7, and Figure 8)
(1) Differential Delays are defined as calculated results from single ended rise and fall time measurements. This approach in establishing AC performance specifications has been taken due to limitations of available Automatic Test Equipment (ATE). The calculated ATE results assume a linear transition between measurement points and are a result of the following equations:00851212.pngWhere: Tcr = Crossing Point Tra, Trb, Tfa and T fb are time measurements with respect to the input. See Figure 8.

6.8 Typical Characteristics

Test Setup: Figure 5. Data Rate, Test Pattern: 2 Mbps, 1010 Pattern. T: 25°C
C004_SNLS374.png
Figure 1. Typical Driver Output Low to High Transition Time vs Supply Voltage
C005_SNLS374.png
Figure 2. Typical Driver Output High to Low Transition Time vs Supply Voltage