W6691CD WINBOND [Winbond], W6691CD Datasheet - Page 14

• Manufacturer Part Number: W6691CD
• Description: ISDN S/T Interface Transceiver
• Manufacturer: WINBOND [Winbond]

DCL
FSC
DD
DU
CP/BCL
FSCO
DCLO
C16.384
PFCK1
PFCK2
PBCK
PTXD
PRXD
SR1
SR2
SX1
63
62
61
60
1
34
33
51
54
53
55
56
57
42
43
45
PCM Interface( It is only used in TE Mode)
ISDN Signals and External Crystal
I/O
I/O
I/O
I/O
O
O
O
O
O
O
O
O
I
I
I
I
GCI Bus Data Clock : the frequency is twice data rate
TE mode : 1.536 MHz.
LT-T/LT-S mode : 4.096 MHz.
NT mode : 512KHz
It needs external pull-up.
GCI Bus Frame Synchronization Clock: 8KHz. It needs external
pull-up.
GCI Bus Data Downstream. It needs external pull-up.
GCI Bus Data Upstream. It needs external pull-up.
CP – output 512KHz in LT-T mode.
BCL – output 768KHz in TE mode.
Output FSCO clock 8KHz for LT-T/LT-S mode(NT2 application). It
is synchronous to DCLO.
Output
application). It is synchronous to T interface clock.
16.384 MHz clock input for DPLL circuit to generate FSCO and
DCLO.
PCM port1 frame synchronization signal, with 8 KHz repetition rate
and 8 bits pulse width.
PCM port2 frame synchronization signal, with 8 KHz repetition rate
and 8 bits pulse width.
PCM bit synchronization clock of 1.536 MHz.
PCM transmit bus data output. A maximum of two channels with
64 Kbits/s data rate can be multiplexed on this signal. It needs
external pull-up.
PCM bus receive data input. A maximum of two channels with 64
Kbits/s data rate can be multiplexed on this signal. It needs
external pull-up.
S/T bus receiver input (negative).
S/T bus receiver input (positive).
S/T bus transmitter output (positive).
GCI Bus
DPLL
14
clock
4.096MHz
Preliminary W6691
Publication Release Date: Sep 2001
for
LT-T/LT-S
mode(NT2
Revision 1.1