m28333-3x Mindspeed Technologies, m28333-3x Datasheet - Page 11

• Manufacturer Part Number: m28333-3x
• Description: Single/dual/triple E3/ds3/sts-1 Line Interface Unit
• Manufacturer: Mindspeed Technologies

28333-DSH-003-A
1.0 Pin Description
1.1 Pin Assignments
Figures 1-1
assignments for the 100-pin ETQFP.
NOTE:
receive and transmit analog circuitry powers down. Analog inputs (RLINE) are
ignored and analog outputs (TLINE) are high impedance. Digital inputs of a
powered-down channel are still active, but ignored. Overall noise on the device
can be lowered by not driving the digital inputs of a powered-down channel.
NOTE:
The input/output (I/O) column is coded as follows:
I = Input
O = Output
I/O = Bidirectional
P = Power
When a channel is disabled (i.e., the PDx pin is tied low or not connected), all
All digital inputs and outputs contain 75 k pull-down resistors.
When power is disconnected from the device, TLINE pins are low
impedance to ground if driven by more than one forward-bias diode
voltage (0.7 V) below ground. Additionally, driving TLINE, a
forward-bias diode voltage above the VGG pin, creates a low impedance
path from the TLINE pin to the VGG pin. Otherwise, the TLINE pins are
high impedance.
Mindspeed Technologies
(M28331-3x),
1-2
1
(M28332-3x), and
™
1-3
(M28333-3x) illustrate pin
1-1