TLK1201IRCPRG4 Datasheet, PDF (16/22 Pages) Texas Instruments – ETHERNET TRANSCEIVERS

TLK1201RCP, TLK1201IRCP
ETHERNET TRANSCEIVERS
SLLS506E − AUGUST 2001 − REVISED MAY 2007
APPLICATION INFORMATION
Host
Protocol
Device
JTAG
Controller
2.5 V
5 Ω at 100 MHz
2.5 V
VDD VDDA
18
VDDPLL
0.01 µF
GND
GNDPLL ⁶⁴
GNDA
TLK1201I
TLK1201II
17
TESTEN
10
TD0−TD9
TXP ⁶²
22
REFCLK
16
PRBSEN
19
LOOPEN
24
SYNCEN
TXN ⁶¹
47 _SYNC/PASS
10
RD0−RD9
2
RBC0−RBC1
28
ENABLE
RXP ⁵⁴
26 _LOS
32
RBCMODE
15
MODESEL
49
TCK
55
JTMS
48
JTDI
56
JTRSTN
R_t 50 Ω
R_t
RXN ⁵²
50 Ω
27 _JTDO
Controlled Impedance
Transmission Line
Controlled Impedance
Transmission Line
Controlled Impedance
Transmission Line
Controlled Impedance
Transmission Line
Figure 12. Typical Application Circuit (AC mode)
designing with PowerPAD
The TLK1201/TLK1201I is housed in a high-performance, thermally enhanced, 64-pin VQFP (RCP64)
PowerPAD package. Use of the PowerPAD package does not require any special considerations except to note
that the PowerPAD, which is an exposed die pad on the bottom of the device, is a metallic thermal and electrical
conductor. Therefore, if not implementing PowerPAD PCB features, the use of solder masks (or other assembly
techniques) may be required to prevent any inadvertent shorting by the exposed PowerPAD of connection
etches or vias under the package. It is strongly recommended that the PowerPAD be soldered to the thermal
land. The recommended convention, however, is to not run any etches or signal vias under the device, but to
have only a grounded thermal land as explained below. Although the actual size of the exposed die pad may
vary, the minimum size required for the keepout area for the 64-pin PFP PowerPAD package is 8 mm × 8 mm.
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