Datasheet

DS26518 8-Port T1/E1/J1 Transceiver
292 of 312
12.1 Thermal Characteristics
Table 12-4. Thermal Characteristics
PARAMETER CONDITIONS MIN TYP MAX UNITS
Ambient Temperature (Note 1) -40 +85 °C
Junction Temperature +125 °C
Theta-JA (θ
JA
) in Still Air for 256-Pin TE-CSBGA
(Note 2) +17.5 °C/W
Note 1: The package is mounted on a four-layer JEDEC standard test board.
Note 2:
Theta-JA (θ
JA
) is the junction-to-ambient thermal resistance, when the package is mounted on a four-layer JEDEC standard test
board.
12.2 Line Interface Characteristics
Table 12-5. Transmitter Characteristics
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
E1 75Ω
2.13 2.37 2.61
E1 120Ω
2.70 3.00 3.30
T1 100Ω
2.40 3.00 3.60
Output Mark Amplitude V
m
J1 110
Ω
2.40 3.00 3.60
V
Output Zero Amplitude V
s
(Note 1) -0.3 +0.3 V
Transmit Amplitude Variation with
Supply
-1 +1 %
Table 12-6. Receiver Characteristics
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Cable Attenuation Attn 43 dB
192
192
Allowable Zeros Before Loss
(Note 1)
2048
24
192
Allowable Ones Before Loss
(Note 2)
192
Note 1: 192 zeros for T1 and T1.231 Specification Compliance. 192 zeros for E1 and G.775 Specification Compliance. 2048 zeros for
ETS 300 233 compliance.
Note 2: 24 ones in 192-bit period for T1.231; 192 ones for G.775; 192 ones for ETS 300 233.