78Q2120C09-64CGT/F Maxim Integrated Products, 78Q2120C09-64CGT/F Datasheet - Page 30

• Manufacturer Part Number: 78Q2120C09-64CGT/F
• Description: TXRX 10/100 BASE 3.3V 64-LQFP
• Manufacturer: Maxim Integrated Products

Specifications of 78Q2120C09-64CGT/F

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Page: 30 of 35
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
78Q2120C09 device.
Connecting a resistor
between these pins as in
the 78Q2120C09 will have
no effect on this device
68 ohm Impedance Traces
VCC
R1
5.1K
RESET
GND
C1
0.1
R6
R7
R8
R9
R10
R11
R12
VCC
GND
100
100
100
100
100
100
100
C7
0.01
C2
0.1
GND
U1
78Q2120C09-CGT
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
LEDBT
LEDTX
TXON
RPTR
RXDV
TXOP
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
C10
39pF
Note 1
©
GND
2009 Teridian Semiconductor Corporation
25.000MHZ
50ppm
100 ohm
Impedance
Traces
Y1
GND
CRS
COL
RXDV
LEDL
LEDTX
LEDRX
LEDCOL
LEDFD
LED100
LED10
INTERRUPT
C9
39pF
GND
VCC
C9 and C10 must be calibrated
in actual application board for
25.000MHz +/-50ppm.
R2
49.9
1%
0603
R4
49.9
1%
0603
C6
0.1
R3
49.9
1%
0603
R5
49.9
1%
0603
15
14
16
C5
0.01
8
9
1
3
2
VCC
C12
0.1
TD+
TDCT
TD-
NC1
NC2
RD+
RDCT
RD-
T1
TLA-6T103
TDK
SMT16
Note 2: This application circuit is only
valid for the 78Q2120C09 revision.
Refer to Ordering Information for
revision identification.
RXCT
TXCT
RX+
TX+
RX-
TX-
11
12
10
7
5
6
100 ohm
Impedance
Traces
R16
75
R13
75
C11
0.01
1.5KV
1808
10/100BASE-TX
R17
75
R14
75
R18
75
Transceiver
R15
75
78Q2120C
CGND
Rev 1.3
J1
1
2
3
4
5
6
7
8
9
10
RJ45