BCM5208KPF Broadcom, BCM5208KPF Datasheet - Page 15

• Manufacturer Part Number: BCM5208KPF
• Manufacturer: Broadcom

Specifications of BCM5208KPF

• Number Of Receivers: 4
• Data Rate: 10/100Mbps
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3.14V
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Lead Free Status / RoHS Status: Not Compliant

November 3, 1999
Table 4 provides the pin descriptions for the BCM5208.
Document 5208-DS03-R¥¥¥¥¥
PIN
MEDIA CONNECTIONS
60, 75, 82,
97
61, 74, 83,
96
65, 70, 87,
92
66, 69, 88,
91
48,46,108,
110
49, 47,
109, 111
CLOCK
6
114
MII INTERFACE
27
12
145
130
33, 34, 35,
36
208, 1, 9,
10
150, 149,
148, 147
124, 123,
122, 121
37,11,146,
120
Note: # = active low, I = digital input, O = digital output, I/O = bidirectional, I
digital input w/ internal pull-up, I
I/O
by {Port #}.
PD
= bidirectional w/ internal pull-down, B = Bias. Bus Naming Convention: pin label followed by [MSB:LSB] followed
PIN LABEL
RD+ {1:4}
RD− {1:4}
TD+ {1:4}
TD− {1:4}
SD+ {1:4}
SD− {1:4}
CK25
CK10RPTR
TXC {1}/CLK2.5
TXC {2}/CLK10
TXC {3}/CLK20
TXC {4}/CLK40
TXD[3:0] {1}
TXD[3:0] {2}
TXD[3:0] {3}
TXD[3:0] {4}
TXEN {1:4}
SECTION 2: HARDWARE SIGNAL DEFINITION TABLE
PD
TYPE
I
O
I
I
I
O
I
I
A
PD
PD
PD
A
3S
= digital input w/ internal pull-down, O
DESCRIPTION
Receive Pair. Differential data from the media is received on the RD± signal pair.
Transmit Pair. Differential data is transmitted to the media on the TD± signal
pair.
100BASE-FX Signal Detect. Indicates signal quality status on the fiber-optic link
in 100BASE-FX mode. When the signal quality is good, the SD+ pin should be
driven high relative to the SD− pin. 100BASE-FX mode is disabled when both
pins are simultaneously pulled low.
25 MHz Reference Clock Input. This pin must be driven with a continuous
25 MHz clock in all operating modes. In 100BASE-X repeater modes, this signal
may be used as the transmit clock input when the BCM5208 is receiving instead
of sourcing the transmit clock.
10BASE-T Repeater Clock Input. This pin must be driven with a continuous
clock only if one or more transceivers are to operate in 10BASE-T repeater
mode. It must be sourced with a 2.5 MHz clock for 10BASE-T MII repeater mode
and with a 10 MHz clock for 10BASE-T serial repeater mode.
Transmit Clock. When in DTE mode, delivers a 25 MHz output in 100BASE-X
mode and 2.5 MHz in 10BASE-T mode. When in Repeater Mode (RPTR pin 41
High), the TXC pins output fixed frequency clocks during and after Reset. These
clocks are continuously driven, free-running outputs, generated from CK25 at
frequencies of 2.5, 10, 20 and 40 MHz.
Transmit Data Input. Nibble-wide transmit data is input on these pins
synchronously to TXC. TXD[3] is the most significant bit.
Transmit Enable. Active high. Indicates that the data nibble is valid on TXD[3:0].
Table 4: Pin Descriptions
B r o a d c o m C o r p o r a t i o n
OD
= open-drain output, O
A
= analog input, O
A
= analog output, I
3S
= three-state output,
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