10

Lucent Technologies Inc.

Data Sheet

February 1998

T7503 Dual PCM Codec with Filters

Timing Characteristics

Table 14. Clock Section (See Figures 5 and 6.)

Table 15. Transmit Section (See Figures 5 and 6.)

* Timing parameter tMCHDZ is referenced to a high-impedance state.

Table 16. Receive Section (See Figures 5 and 6.)

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

tMCHMCL1

Clock Pulse Width

—

97

—

—

ns

tCDC

Duty Cycle, MC

—

40

—

60

%

tMCH1MCH2

tMCL2MCL1

Clock Rise and

Fall Time

—

0

—

15

ns

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

tMCHDV

Data Enabled on TS Entry

0

—

60

ns

tMCHDV1

Data Delay from MC

0

—

60

ns

tMCHDZ*

Data Float on TS Exit

10

—

100

ns

tFSHMCL

Frame-sync Hold Time

—

50

—

—

ns

tMCLFSH

Frame-sync High Setup

—

50

—

—

ns

tFSLMCL

Frame-sync Low Setup

—

50

—

—

ns

Symbol

Parameter

Test Conditions

Min

Typ

Max

Unit

tDVMCL

Receive Data Setup

—

30

—

—

ns

tMCLDV

Receive Data Hold

—

15

—

—

ns