78Q2120C Teridian Semiconductor Corp. (TDK Semiconductor), 78Q2120C Datasheet - Page 29

• Manufacturer Part Number: 78Q2120C
• Description: 10/100 Ethernet PHYS
• Manufacturer: Teridian Semiconductor Corp. (TDK Semiconductor)

78Q2120C
10/100BASE-TX Transceiver
© 2003 TDK Semiconductor Corporation, Proprietary and Confidential
RXCLK
TXCLK
RXER
TXEN
TXER
RXD3
RXD2
RXD1
RXD0
MDIO
TXD3
TXD2
TXD1
TXD0
MDC
1) Recommend to
leave pins 56 and 56
as NC for 78Q2120C
device. Connecting a
resistor between
these pins as in the
78Q2120 will have no
effect on this device
68 ohm Impedance Traces
VCC
R1
2k
RESET
R6
R7
R8
R9
R10
R11
R12
GND
VCC
C1
0.1
33
33
33
33
33
33
33
GND
GND
C7
0.01
C2
0.1
U1
78Q2120C-64CGT
TSC
LQFP64
28
27
26
32
31
30
29
24
25
19
20
21
22
18
17
47
44
45
46
64
12
13
14
15
16
6
7
2
1
GND
C8
0.01
C3
0.1
TXEN
TXCLK
TXER
TXD3
TXD2
TXD1
TXD0
RXCLK
RXER
RXD3
RXD2
RXD1
RXD0
MDC
MDIO
RST
PWRDN
ANEGA
TECH2
TECH1
TECH0
PCSBP
ISO
ISODEF
PHYAD4
PHYAD3
PHYAD2
PHYAD1
PHYAD0
GND
C4
0.1
GND
FIGURE 1: TYPICAL APPLICATIONS CIRCUIT
VCC
LEDCOL
LEDFDX
LEDBTX
LEDRX
LEDTX
LEDBT
RPTR
RXDV
TXOP
TXON
LEDL
CKIN
RXIP
RXIN
INTR
XTLP
XTLN
CRS
COL
NC
NC
61
62
52
51
50
34
33
23
40
39
38
37
49
36
48
35
56
54
4
59
58
50 ohm Impedance Traces
C10
27pF
Note 1
GND
25.000MHZ
50ppm
Y1
R2
49.9
1%
0603
- 29 -
VCC
GND
C9
27pF
GND
INTERUPT
R3
49.9
1%
0603
CRS
COL
RXDV
LEDL
LEDTX
LEDRX
LEDCOL
LEDFD
LED100
LED10
RXR
R4
49.9
1%
0603
C6
0.1
R5
49.9
1%
0603
C5
0.1
VCC
1
2
3
4
5
6
7
8
C12
0.1
TD+
TDCT
TD-
NC1
NC2
RD+
RDCT
RD-
T1
TLA-6T118LF
TDK
SMT16
RXCT
TXCT
NC4
NC3
RX+
TX+
RX-
TX-
50 ohm Impedance Traces
16
15
14
13
12
11
10
9
R16
75
R13
75
C11
0.01
1.5KV
1808
R17
75
R14
75
R18
75
R15
75
CGND
J1
1
2
3
4
5
6
7
8
9
10
RJ45
Rev_1.1