HFC-4S Cologne Chip AG, HFC-4S Datasheet - Page 155

• Manufacturer Part Number: HFC-4S
• Description: Isdn HDLC Fifo Controller With 8 (4) Integrated S/t Interfaces
• Manufacturer: Cologne Chip AG

March 2003 (rev. A)
HFC-4S
HFC-8S
U1
HFC-4S/HFC-8S
ADJ_LEVx
LEV_Ax
LEV_Bx
R_Ax
R_Bx
3 k 9
R1
Figure 5.6: External S/T receive circuitry for TE and NT mode
G N D
G N D
+ 3 . 3 V
G N D
C1
2 2 p
C2
2 2 p
4 7 n
C3
R2
C1 and C2 should be located as
near as possible to the RAx and
RBx inputs of the chip.
R6
R8
R5
R9
1 M 2
S/T interface
R7
Data Sheet
+ 3 . 3 V
+ 3 . 3 V
3 k 9
R10
3 k 9
R3
B A V 9 9
B A V 9 9
D1
D2
3 k 9
R11
3 k 9
R4
G N D
TR1A
Cologne
Chip
REC
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