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T7504

Quad PCM Codecs with Filters

Agere -> LSI Corporation 

Data Sheet

March 1999

T7504 and T5504 Quad PCM Codecs with Filters

Timing Characteristics

Table 14. Clock Section (See Figures 6, 7, 8, and 9.)

Symbol

tMCHMCL1

tCDC

tMCH1MCH2

tMCL2MCL1

Parameter

Clock Pulse Width

Duty Cycle, MC

Clock Rise and

Fall Time

Test Conditions Min Typ Max Unit

—

97

—

—

ns

—

40

—

60

%

—

0

—

15

ns

Table 15. T7504 Transmit Section (See Figure 6.)

Symbol

tMCHDV

tMCHDV1

tMCLDZ*

tFSHMCL

tMCLFSH

tFSLMCL

tFSHFSL

Parameter

Data Enabled on TS Entry

Data Delay from MC

Data Float on TS Exit

Frame-sync Hold Time

Frame-sync High Setup

Frame-sync Low Setup

Frame-sync Pulse Width

Test Conditions Min

0 < CLOAD < 100 pF 0

0 < CLOAD < 100 pF 0

CLOAD = 0

15

—

50

—

50

—

50

—

0.1

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

Typ

Max

Unit

—

60

ns

—

60

ns

—

100

ns

—

—

ns

—

—

ns

—

—

ns

— 125 – tMCHMCH µs

Table 16. T5504 Transmit Section (See Figure 8.)

Symbol

tFSHDV

tMCHDV1

tMCHDZ*

tFSHMCL

tMCLFSH

tFSLMCL

tFSHFSL

Parameter

Data Enabled on TS Entry

Data Delay from FSX

Data Float on TS Exit

Frame-sync Hold Time

Frame-sync High Setup

Frame-sync Low Setup

Frame-sync Pulse Width

Test Conditions

0 < CLOAD < 100 pF

0 < CLOAD < 100 pF

CLOAD = 0

—

—

—

—

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

Min Typ

Max

Unit

0

—

80

ns

0

—

60

ns

0

—

30

ns

50

—

—

ns

50

—

—

ns

50

—

—

ns

0.1 — 125 – tMCHMCH µs

Lucent Technologies Inc.

11

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