HC-5560 Datasheet, PDF (8/9 Pages) Intersil Corporation – PCM Transcoder

Timing Waveforms (Continued)
HC-5560
CLK DEC
RESET AIS
NRZ DATA OUT
AIS
FIGURE 5.
Zeros which occur during a high to low transition of Reset AIS are counted with the zeros that occurred before the high to low transi-
tion.
NRZ DATA IN
CLK ENC
OUT 1
AMI
OUT 2
HDB3
OUT 1
OUT 2
S
S
S
S
S
B6ZS
OUT 1
OUT 2
S
S
S
S
B8ZS
OUT 1
OUT 2
3 1/2 CYCLES
5 1/2 CYCLES
S
S
S
FIGURE 6. ENCODE TIMING AND DELAY
Data is clocked on the negative edge of CLK ENC and appears on OUT1 and OUT2. OUT1 and OUT2 are interchangeable. Bipo-
lar violations and all other pulses inserted by the line coding scheme to encode strings of zeros are labeled with an “S”.
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