16

16

Agere Systems Inc.

Data Sheet, Rev. 3

May 2004

Two-Cable Transceiver/Arbiter Device

FW802B Low-Power PHY IEEE 1394A-2000

Table 4. Driver Characteristics

Parameter

Test Conditions

Symbol

Min

Typ

Max

Unit

Differential Output Voltage

56

Ω load

172

—

265

mV

Off-state Common-mode Voltage

Drivers disabled

——

20

mV

Driver Differential Current,

TPA+, TPA

−, TPB+, TPB−

Driver enabled,

speed signaling off*

* Limits are defined as the algebraic sum of TPA+ and TPA

− driver currents. Limits also apply to TPB+ and TPB− as the algebraic sum of driver

currents.

† Limits are defined as the absolute limit of each of TPB+ and TPB

− driver currents.

−1.05

—

1.05

mA

Common-mode Speed Signaling

Current, TPB+, TPB

−

200 Mbits/s speed

−2.53

—

−4.84

mA

400 Mbits/s speed

−8.1

—

−12.4

mA