TCM320AC36, TCM320AC37

VOICE-BAND AUDIO PROCESSORS (VBAP

™)

SLWS003C – MAY 1992 – REVISED APRIL – 1998

11

POST OFFICE BOX 655303

propagation delay times over recommended ranges of operating conditions, variable-data-rate mode (see

Figure 4)

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

tpd6

FSX high to DOUT bit 1 valid

CL = 0 to 10 pF

30

ns

tpd7

DCLKX high to DOUT valid, bits 2 to n

CL = 0 to 10 pF

40

ns

tpd8

FSX low to DOUT bit n Hi-Z

20

ns

PARAMETER MEASUREMENT INFORMATION

or clocked out first on DOUT. Bit n = LSB (least significant bit) and is clocked in last on DIN or is clocked out last on

DOUT. N = 8 for the companded mode, and N = 16 for the linear mode.

N–1

N

1

23

4

N – 1

N

1

N+1

N

N–1

N–2

4

3

2

1

0

CLK

FSR

DIN

tsu(FSR)

th(FSR)

See Note B

See Note A

th(DIN)

tsu(DIN)

Receive Time Slot

20%

20%

80%

80%

See Note C

N–2

NOTES: A. This window is allowed for FSR high.

B. This window is allowed for FSR low.

C. Transitions are measured at 50%.

Figure 1. Fixed-Data Rate Mode, Receive Side Timing Diagram

N–1

N–2

3

2

1

N+1

N

N–1

N–2

4

3

2

1

0

N

th(FSX)

CLK

FSX

DOUT

TSX

See Note B

tpd2

tpd3

tpd1

tpd4

tpd5

Transmit Time Slot

tsu(FSX)

20%

80%

20%

80%

See Note C

20%

80%

See Note A

NOTES: A. This window is allowed for FSX high.

B. This window is allowed for FSX low (th(FSX) max determined by data collision considerations).

C. Transitions are measured at 50%.

Figure 2. Fixed-Data Rate Mode, Transmit Side Timing Diagram