TSB41BA3 datasheet(9/63 Pages) TI

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TSB41BA3

IEEE 1394b THREEPORT CABLE TRANSCEIVER/ARBITER

SLLS155A − MAY 2003 − REVISED OCTOBER 2003

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

Terminal Functions (Continued)

TERMINAL

I/O

DESCRIPTION

NAME

TYPE

NO.

I/O

DESCRIPTION

PLLVDD-1.8

Supply

29,

−

PLL 1.8-V circuit power terminals. A combination of high-frequency decoupling capacitors near each

terminal are suggested, such as paralleled 0.1

µF and 0.001 µF. An additional 1-µF capacitor is

required for voltage regulation. The PLLVDD-1.8 terminals must be separate from the DVDD-1.8

terminals. These supply terminals are separated from the DVDD-1.8, DVDD-3.3, PLLVDD-3.3 and

AVDD-3.3 terminals internal to the device to provide noise isolation.

PLLVDD-3.3

Supply

−

PLL 3.3-V circuit power terminal. A combination of high-frequency decoupling capacitors near the

terminal are suggested, such as paralleled 0.1

µF and 0.001 µF. Lower frequency 10-µF filtering

capacitors are also recommended. This supply terminal is separated from the DVDD-1.8, DVDD-3.3,

PLLVDD-1.8, and AVDD-3.3 terminals internal to the device to provide noise isolation. The DVDD-3.3

terminals must be tied together at a low-impedance point on the circuit board. The PLLVDD-3.3,

AVDD-3.3, and DVDD-3.3 terminals must be tied together with a low dc impedance connection.

RESETz

CMOS

Logic reset input. Asserting this terminal low resets the internal logic. An internal pullup resistor to VDD

is provided so only an external delay capacitor is required for proper power-up operation (see power-up

reset in the APPLICATIONS INFORMATION section). The RESETz terminal also incorporates an

internal pulldown which is activated when the PD input is asserted high. This input is otherwise a

standard logic input, and can also be driven by an open-drain type driver.

Bias

−

Current setting resistor terminals. These terminals are connected to a precision external resistance to

set the internal operating currents and cable driver output currents. A resistance of 6.34 k

Ω ±1% is

required to meet the IEEE Std 1394-1995 output voltage limits.

CMOS

Test control input. This input is used in the manufacturing test of the TSB41BA3. For normal use this

terminal must be pulled low either through a 1-k

Ω resistor to GND or directly to GND.

SLPEN

CMOS

Automotive sleep mode enable input. This terminal is used to enable the automotive sleep mode.

When deasserted, normal 1394.b functionality is maintained.

CMOS

Test control input. This input is used in the manufacturing test of the TSB41BA3. For normal use this

terminal must be pulled low either through a 1-k

Ω resistor to GND or directly to GND.

S2_PC0

S1_PC1

S0_PC2

CMOS

Port sleep/mode selection terminals 2−0 and power class programming. On hardware reset, this

terminal when used with the other 5 selection pins allows the user to select the speed and mode of the

ports. See Table 1. Depending on the selection these inputs may set the default value of the power

class indicated during self-ID.

Programming is done by tying the terminals high through a 1-k

Ω or smaller resistor or by tying directly to

ground through a 1-k

Ω or smaller resistor. Bus holders are built into these terminals.

S3_DS0

CMOS

Port sleep/mode selection terminal 3. On hardware reset, this terminal when used with the other 5

selection pins allows the user to select the speed and mode of the ports. See Table 1. Programming is

done by tying the terminals high through a 1-k

Ω or smaller resistor or by tying directly to ground through

a 1-k

Ω or smaller resistor. A bus holder is built into this terminal.

S4_DS1

CMOS

Port sleep/mode selection terminal 4. On hardware reset, this terminal when used with the other 5

selection pins allows the user to select the speed and mode of the ports. See Table 1. Programming is

done by tying the terminals high through a 1-k

Ω or smaller resistor or by tying directly to ground through

a 1-k

Ω or smaller resistor. A bus holder is built into this terminal.

TSB41BA3 Datasheet(PDF) 9 Page - Texas Instruments

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