SNLS244H September   2006  – January 2016 DS42MB100


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Ratings
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. Parameter Measurement Information
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 CML Drivers and Pre-Emphasis Control
  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 Documentation Support
      1. 12.1.1 Related Documentation
    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

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • NJK|36
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6 Specifications

6.1 Absolute Maximum Ratings

Supply voltage (VCC) –0.3 4 V
CMOS/TTL input voltage –0.3 VCC + 0.3 V
CML input/output voltage –0.3 VCC + 0.3 V
Junction temperature 150 °C
Lead temperature (soldering, 4 seconds) 260 °C
Storage temperature, Tstg –65 150 °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 TI Sales Office/Distributors for availability and specifications.

6.2 ESD Ratings

V(ESD) Electrostatic discharge Human-body model (HBM), 1.5 kΩ, 100 pF, per ANSI/ESDA/JEDEC JS-001(1) ±6000 V
Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±1250
Machine model ±350
(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 Ratings

Supply voltage (VCC – GND) 3.135 3.3 3.465 V
Supply noise amplitude  (10 Hz to 2 GHz) 100 mVPP
Ambient temperature –40 85 °C
Case temperature 100 °C

6.4 Thermal Information

RθJA Junction-to-ambient thermal resistance(2) 32.8 °C/W
RθJC(top) Junction-to-case (top) thermal resistance 14.3 °C/W
RθJB Junction-to-board thermal resistance 6.2 °C/W
ψJT Junction-to-top characterization parameter 0.2 °C/W
ψJB Junction-to-board characterization parameter 6.1 °C/W
RθJC(bot) Junction-to-case (bottom) thermal resistance 1.9 °C/W
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.
(2) Thermal resistances are based on having 16 thermal relief vias on the DAP pad under the 0 airflow condition.

6.5 Electrical Characteristics

Over recommended operating supply and temperature ranges unless otherwise specified.
VIH High level input voltage 2 VCC + 0.3 V
VIL Low level input voltage –0.3 0.8 V
IIH High level input current VIN = VCC –10 10 µA
IIL Low level input current VIN = GND 75 94 124 µA
RPU Pull-high resistance 35
VID Differential input voltage range(2) AC coupled differential signal.
This parameter is not tested at production.
Below 1.25 Gbps 100 1750 mVP-P
Between 1.25 Gbps–3.125 Gbps 100 1560
Above 3.125 Gbps 100 1200
VICM Common-mode voltage at receiver inputs Measured at receiver inputs reference to ground. 1.3 V
RITD Input differential termination(3) On-chip differential termination between IN+ or IN−. 84 100 116 Ω
VODB Output differential voltage swing without pre-emphasis(4) RL = 100 Ω ±1%
DES_1 = DES_0 = 0
DEL_1 = DEL_0 = 0
Driver pre-emphasis disabled.
Running K28.7 pattern at 4.25 Gbps.
See Figure 6 for test circuit.
1100 1300 1500 mVP-P
VPE Output pre-emphasis voltage ratio
20 × log (VODPE / VODB)
RL = 100 Ω ±1%
Running K28.7 pattern at
4.25 Gbps
x = S for switch side pre-emphasis control
x = L for line side pre-emphasis control
See Figure 9 on waveform.
See Figure 6 for test circuit.
DEx_[1:0] = 00 0 dB
DEx_[1:0] = 01 –3
DEx_[1:0] = 10 –6
DEx_[1:0] = 11 –9
TPE Pre-emphasis width Tested at −9-dB pre-emphasis level, DEx[1:0] = 11
x = S for switch side pre-emphasis control
x = L for line side pre-emphasis control
See Figure 3 on measurement condition.
125 188 250 ps
ROTSE Output termination(3) On-chip termination from OUT+ or OUT− to VCC 42 50 58 Ω
ROTD Output differential termination On-chip differential termination between OUT+ and OUT− 100 Ω
ΔROTSE Mismatch in output termination resistors Mismatch in output terminations at OUT+ and OUT− 5%
VOCM Output common mode voltage 2.7 V
PD Power dissipation VDD = 3.3 V at 25°C
All outputs terminated by 100 Ω ±1%.
DEL_[1:0] = 0, DES_[1:0] = 0
Running PRBS 27– 1 pattern at 4.25 Gbps
0.45 W
RJ Device random jitter(5) See Figure 6 for test circuit.
Alternating 1-0 pattern.
EQ and pre-emphasis disabled.
At 0.25 Gbps 2 psrms
At 1.25 Gbps 2
At 4.25 Gbps 2
DJ Device deterministic jitter(6) See Figure 6 for test circuit.
EQ and pre-emphasis disabled
Between 0.25 and
4.25 Gbps with PRBS7 pattern for DS42MB100 at –40°C to 85°C
35 psp-p
DR Data rate(2) Tested with alternating 1-0 pattern 0.25 4.25 Gbps
(1) Typical parameters measured at VCC = 3.3 V, TA = 25°C, and represent most likely parametric norms at the time of product characterization. The typical specifications are not ensured.
(2) This parameter is specified by design and/or characterization. It is not tested in production.
(3) IN+ and IN− are generic names refer to one of the many pairs of complimentary inputs of the DS42MB100. OUT+ and OUT− are generic names refer to one of the many pairs of the complimentary outputs of the DS42MB100. Differential input voltage VID is defined as |IN+–IN−|. Differential output voltage VOD is defined as |OUT+–OUT−|.
(4) K28.7 pattern is a 10-bit repeating pattern of K28.7 code group {001111 1000} K28.5 pattern is a 20-bit repeating pattern of +K28.5 and −K28.5 code groups {110000 0101 001111 1010}
(5) Device output random jitter is a measurement of the random jitter contribution from the device. It is derived by the equation sqrt(RJOUT2 – RJIN2), where RJOUT is the total random jitter measured at the output of the device in psrms, RJIN is the random jitter of the pattern generator driving the device.
(6) Device output deterministic jitter is a measurement of the deterministic jitter contribution from the device. It is derived by the equation (DJOUT – DJIN), where DJOUT is the total peak-to-peak deterministic jitter measured at the output of the device in psp-p, DJIN is the peak-to-peak deterministic jitter of the pattern generator driving the device.

6.6 Switching Characteristics

over operating free-air temperature range (unless otherwise noted)
tR Differential low to high transition time Measured with a clock-like pattern at 4.25 Gbps, between 20% and 80% of the differential output voltage. Pre-emphasis disabled.
Transition time is measured with fixture as shown in Figure 6, adjusted to reflect the transition time at the output pins.
85 ps
tF Differential high to low transition time 85 ps
tPLH Differential low to high propagation delay Measured at 50% differential voltage from input to output. 1 ns
tPHL Differential high to low propagation delay 1 ns
tSKP Pulse skew |tPHL – tPLH| 20 ps
tSKO Output skew(1) Difference in propagation delay among data paths in the same device. 100 ps
tSKPP Part-to-part skew Difference in propagation delay between the same output from devices operating under identical condition. 100 ps
tSM MUX switch time Measured from VIH or VIL of the MUX-control or loopback control to 50% of the valid differential output. 1.8 6 ns
(1) tSKO is the magnitude difference in the propagation delays among data paths. An example is the output skew among data paths from IN0± to OUT± and IN1± to OUT±.. Another example is the output skew among data paths from IN± to OUT0± and IN± to OUT1±. tSKO also refers to the delay skew of the loopback paths of the same port and between similar data paths. An example is the output skew among data paths IN0± to OUT0± and IN1± to OUT1±.
DS42MB100 20209005.gif Figure 1. Driver Output Transition Time
DS42MB100 20209006.gif Figure 2. Propagation Delay From Input To Output
DS42MB100 20209007.gif Figure 3. Test Condition For Output Pre-Emphasis Duration

6.7 Typical Characteristics

DS42MB100 PRBS-7_Pre0_4G.gif Figure 4. PRBS-7, Pre-Emphasis = 0 dB at 4 Gbps
DS42MB100 PRBS-7_Pre9_4G.gif Figure 5. PRBS-7, Pre-Emphasis = –9 dB at 4 Gbps