w6691 Winbond Electronics Corp America, w6691 Datasheet - Page 99

• Manufacturer Part Number: w6691
• Description: Isdn S/t Interface Transceiver
• Manufacturer: Winbond Electronics Corp America

External ocsillator input (XTAL1) clock characteristics
9.4 Preliminary Switching Characteristics
9.4.1 PCM Interface Timing
Note 1: These drawings are not to scale.
2: The frequency of PBCK is 1536 kHz which includes 24 channels of 64 kbps data. The PFCK1 and PFCK2 are located at channel 1
and channel 2, each with a 8 x PBCK duration.
Parameter
Duty cycle
(1.536MHz)
PBCK
PFCK1
PFCK2
PTXD
PRXD
Min.
1:2
Port1
Port1
CH 1
CH 2
Port2
Port2
Max.
2:1
24 CHs
99
Preliminary W6691
Publication Release Date: Sep 2001
Port1
Port1
Port2
Port2
Revision 1.1