TXC-03303-ARPQ Transwitch Corporation, TXC-03303-ARPQ Datasheet - Page 48

• Manufacturer Part Number: TXC-03303-ARPQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-03303-ARPQ

• Lead Free Status / RoHS Status: Compliant

INITIALIZATION SEQUENCE
The following table lists the sequence that should be followed for initializing the M13E by writing codes to regis-
ter 1FH:
SYSTEM CONSIDERATIONS
Careful attention must be paid to power supply decoupling, device layout, and printed circuit board traces. The
M13E has separate +5 volt supply (V
together to a single +5 volt power supply in order to avoid excessive substrate currents. TranSwitch recom-
mends that good quality, high frequency, low lead inductance 0.1 microfarad ceramic capacitors be used for
decoupling and that they be connected in close proximity to the supply input pins on the device. If low fre-
quency noise is present on the +5 volt supply lead, TranSwitch recommends that a 10 microfarad 6.3 volt tan-
talum capacitor be connected between +5 volts and ground.
A multilayer board that has separate planes for ground and power should be used. Because of the data rate at
which the M13E operates, it is important that connections between devices be as short as possible. This is
especially true for the DS3 receive and transmit interface connections between the M13E and a line interface
device, such as the TranSwitch ART, ARTE or DS3LIM-SN. In addition, the clock and data traces should be the
same length.
THROUGHPUT DELAYS
The data transmission paths of the M13E device are subject to throughput delays from input to output, as iden-
tified in the following table:
Direction
Transmit
Receive
Location
1F (R/W)
1F (R/W)
DS3DR
From
DTn
Code (Hex)
F0
00
DS3DT
DRn
To
DD
) pins which provide internal circuit isolation. All V
Presets internal counters and FIFOs.
Resets internal counters and FIFOs.
Delay (min.) Delay (typ.) Delay (max.)
200 ns
400 ns
- 48 -
4100 ns
Comments
7800 ns
800 ns
DD
pins must be tied
n = 1-28
n = 1-28
Notes
Ed. 4, August 1998
TXC-03303
TXC-03303-MB
M13E