T8502 and T8503 Dual PCM Codecs with Filters
Data Sheet
July 1998
Timing Characteristics
Table 14. Clock Section (See Figures 5 and 6.)
Symbol
tMCHMCL1
tMCH1MCH2
tMCL2MCL1
Parameter
Clock Pulse Width
Clock Rise and
Fall Time
Test Conditions
Min
Typ
Max
Unit
—
97
—
—
ns
—
0
—
15
ns
Table 15. T8502 Transmit Section (See Figure 5.)
Symbol
Parameter
Test Conditions Min
tMCHDV Data Enabled on TS Entry 0 < CLOAD < 100 pF 0
tMCHDV1 Data Delay from MC
0 < CLOAD < 100 pF 0
tMCLDZ* Data Float on TS Exit
CLOAD = 0
10
tFSHMCL Frame-sync Hold Time
—
50
tMCLFSH Frame-sync High Setup
—
50
tFSLMCL Frame-sync Low Setup
—
50
tFSHFSL Frame-sync Pulse Width
—
0.1
* Timing parameter tMCLDZ is referenced to a high-impedance state.
Table 16. T8503 Transmit Section (See Figure 6.)
Symbol
Parameter
Test Conditions Min
tFSHDV Data Enabled on TS Entry 0 < CLOAD < 100 pF 0
tMCHDV1 Data Delay from FSX
0 < CLOAD < 100 pF 0
tMCHDZ* Data Float on TS Exit
CLOAD = 0
0
tFSHMCL Frame-sync Hold Time
—
50
tMCLFSH Frame-sync High Setup
—
50
tFSLMCL Frame-sync Low Setup
—
50
tFSHFSL Frame-sync Pulse Width
—
0.1
* Timing parameter tMCHDZ is referenced to a high-impedance state.
Table 17. T8502 and T8503 Receive Section (See Figures 5 and 6.)
Symbol
tDVMCL
tMCLDV
Parameter
Receive Data Setup
Receive Data Hold
Test Conditions
Min
—
30
—
15
Typ
Max
Unit
—
60
ns
—
60
ns
—
100
ns
—
—
ns
—
—
ns
—
—
ns
— 125 – tMCHMCH µs
Typ
Max
Unit
—
80
ns
—
60
ns
—
30
ns
—
—
ns
—
—
ns
—
—
ns
— 125 – tMCHMCH µs
Typ
Max
Unit
—
—
ns
—
—
ns
10
Lucent Technologies Inc.