Datasheet

78Q2120C
10/100BASE-TX
Transceiver
Page: 33 of 35 © 2009 Teridian Semiconductor Corporation Rev 1.3
PACKAGE PIN DESIGNATIONS
(Top View)
TXD0 TXD1
TX_EN
TX_CLK
TX_ER
RX_ER
RX_CLK
TXD3 TXD2
RXD1 RXD2 RXD3
MDC
MDIO
RXD0
RX_DV
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49 50
63 62 61 60 59 58 57 56 55
54 53
52 51 64
PHYAD1
PHYAD3
VCC
GND
PWRDN
GND
GND
PHYAD2
PHYAD0
PHYAD4
GND
VCC
RST
CKIN
ISO
ISODEF
LEDL
LEDBT
ANEGA
TECH0
TECH1
TECH2
VCC
GND
VCC
LEDTX
LEDCOL
LEDBTX
INTR
CRS
COL
LEDRX
GND
GND
TXON
VCC
PCSBP
TXOP
RPTR
RXIN
RXIP
VCC
NC
XTLN
XTLP
NC
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49 50
63 62 61 60 59 58 57 56 55
54 53
52 51 64
78Q2120C
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
32
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49 50
63 62 61 60 59 58 57 56 55
54 53
52 51 64
49 50
63 62 61 60 59 58 57 56 55
54 53
52 51 64
LEDL
LEDBT
ANEGA
TECH0
TECH1
TECH2
VCC
GND
VCC
LEDTX
LEDCOL
LEDBTX
INTR
CRS
COL
LEDRX
LEDL
LEDBT
ANEGA
TECH0
TECH1
TECH2
VCC
GND
VCC
LEDTX
LEDCOL
LEDBTX
INTR
CRS
COL
LEDRX
LEDFDX