TXC-04252AIPQ Transwitch Corporation, TXC-04252AIPQ Datasheet - Page 28

• Manufacturer Part Number: TXC-04252AIPQ
• Manufacturer: Transwitch Corporation

Specifications of TXC-04252AIPQ

• Pin Count: 160
• Screening Level: Industrial
• Package Type: PQFP
• Lead Free Status / Rohs Status: Not Compliant

Ed. 3, December 2000
QE1M
TXC-04252
TXC-04252-MB
Note: A single TU/VT is shown for illustration purposes. It also shows the TU/VT selection for the drop bus and add bus
DCLK clock period
DCLK duty cycle t
D(7-0)/DPAR data /parity setup time before DCLK
D(7-0)/DPAR data /parity hold time after DCLK
DSPE setup time before DCLK
DSPE hold time after DCLK
DC1J1V1 setup time before DCLK
DC1J1V1 hold time after DCLK
DIND drop bus indication output delay from DCLK
A(7-0)/APAR data /parity out valid delay from DCLK
A(7-0)/APAR data /parity to tristate delay from DCLK
ADD add indicator delay from DCLK
AIND add bus indication output delay from DCLK
A(7-0)/APAR data /parity out tristate to driven delay
from DCLK
Note: All output times are measured with the specified load capacitance.
A/BDC1J1V1
A/BD(7-0)
A/BA(7-0)
A/BDCLK
A/BDPAR
A/BDSPE
A/BDIND
A/BAIND
(Output)
A/BADD
(Output)
(Output)
(Output)
(Input)
(Input)
(Input)
(Input)
APAR
(number 21 in STS-1 number 3). The format is an AU-3/STS-3. For VC-4 operation, one J1 pulse and one optional
V1 pulse are present. An additional byte time of delay in A/BA(7-0) is provided when control bit ABD is written with
a 1. The table omits A/B parameter prefixes. DSPE edges are at payload boundaries.
Figure 8. STM-1/STS-3 A/B Drop and Add Bus Signals, Timing Derived from Drop Bus
t
t
SU(1)
SU(3)
C1(1)
C1(1)
Proprietary TranSwitch Corporation Information for use Solely by its Customers.
PWH
t
t
H(1)
H(3)
Parameter
/t
C1(2)
CYC
t
PWH
t
CYC
C1(3)
t
SU(2)
Data
DATA SHEET
t
H(2)
- 28 of 148 -
t
t
t
t
OD(1)
OD(4)
OD(2)
OD(5)
t
D(1)
Selected
TU/VT
Symbol
t
t
t
t
t
t
t
t
t
SU(1)
t
SU(2)
t
SU(3)
t
t
OD(2)
OD(3)
OD(1)
OD(4)
OD(5)
CYC
H(1)
H(2)
H(3)
D(1)
J1 STS-1 #1
STS-1 #1
J1 Byte
Selected
Drop Bus TU/VT Time Slot selected when enabled
TU/VT
J1 STS-1 #2
Load
STS-1 #2
25pF
75pF
25pF
75pF
t
Add Bus TU/VT Time Slot
Occurs every four frames
OD(3)
selected when enabled
when provided in place
of the H4 byte
J1 STS-1 #3
STS-1 #3
Min
5.0
5.0
5.0
7.0
9.0
8.0
9.0
9.0
7.0
40
10
10
10
V1 STS-1 #1
STS-1 #1
Data
51.44
Typ
50
Max
9.0
60
30
39
20
30
30
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%