DS3153N datasheet(60/60 Pages) DALLAS

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DS3151/DS3152/DS3153/DS3154 Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs

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16.

THERMAL INFORMATION

Table 16-A. Thermal Properties, Natural Convection

PARAMETER

MIN

TYP

MAX

UNITS

Ambient Temperature (Note 1)

-40

+85

°C

Junction Temperature

-40

+125

°C

Theta-JA (

qJA), Still Air (Note 2)

22.4

°C/W

Psi-JB

9.2

°C/W

Psi-JT

1.6

°C/W

Note 1: The package is mounted on a four-layer JEDEC standard test board with no airflow and dissipating maximum power.

Note 2: Theta-JA (

qJA) is the junction-to-ambient thermal resistance, when the package is mounted on a four-layer JEDEC standard test board

with no airflow and dissipating maximum power.

Table 16-B. Theta-JA (

qJA) vs. Airflow

FORCED AIR (m/s)

THETA-JA (

qJA)

22.4

°C/W

19.0

°C/W

2.5

17.2

°C/W

17.

REVISION HISTORY

REVISION

DESCRIPTION

012103

DS3154 new product release

040403

DS3151/DS3152/DS3153 new product releases.

Electrical Characteristics section, Notes 1 and 2: Changed 44.73MHz to 51.84MHz; added indication that

specs are lower for rev A2; “all ones driven into RXPn/RXNn (1.0V square wave)” changed to “analog

loopback enabled” to match production test methodology.

Table 13-B, Input leakage, IIL: -10

mA min changed to -50mA min.

Table 13-B: Replaced TBD values for IDD, IDDTS, and IDDPD (DS3151/DS3152/DS3153); changed IDDPD

spec from 38 typ and 50 max to 45 typ and 70 max.

Table 14-A and Table 14-B: Changed pins RBIN, RCINV, TBIN, and TCINV to “N.C.” to reflect they are

not available in CPU bus mode.

072303

Figure 1-1: Labeled capacitors connected to transformer center taps as “(optional)”.

Section 6, Optional Pre-Amp Paragraph: Clarified that the pre-amp contributes +14dB of flat gain.

Table 11-A: Changed leakage inductance to 0.150

mH max.

Table 11-B: Reformatted table and added row for Pulse Engineering’s T3049 octal transformer.

Table 13-H: Reworded Note 20.

120303

GCR Register Definition (page 16): Clarified that RST bit holds the digital logic of the LIU in reset rather

than the whole LIU.

Table 13-B: Changed DS3151 IDD from 130mA (max) to 100mA (max). Changed DS3151 IDDTTS from

105mA (max) to 80mA (max). Removed sentences in Notes 1 and 2 that labeled IDD and IDDTTS specs for

rev A1 devices.

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