ML6694 Просмотр технического описания (PDF) - Micro Linear Corporation
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ML6694 Datasheet PDF : 12 Pages
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ML6694
PIN DESCRIPTION (Pin numbers for TQFP package in parentheses)
PIN
NAME
DESCRIPTION
1
(39)
AGND1
Analog ground.
2-6 (40-44)
TSM<4:0>
Transmit data TTL inputs. TSM<4:0> inputs accept TX data symbols. Data
appearing at TSM<4:0> are clocked into the ML6694 on the rising edge of TXC.
7
(1)
8,9, (2, 3,
11,13, 5, 7, 9)
15
PWRDN
RSM<4:0>
Device power down input. A low signal powers down all ciruits of the ML6694, and
dissipates less than 20mA.
Receive data TTL outputs. RSM<4:0> outputs may be sampled synchronously with
RXC’s rising edge.
10 (4)
12 (6)
14 (8)
16 (10)
17 (11)
18 (12)
19 (13)
20 (14)
21 (15)
22 (16)
23 (17)
24 (18)
25 (19)
28 (22)
30 (24)
31 (25)
32 (26)
33,34 (27,28)
35 (29)
36 (30)
37,38 (31, 32)
DGND1
DVCC1
DGND2
RXC
DGND3
DVCC2
DGND4A
DGND4B
DGND4C
DVCC5
DGND5
SD0
SEL10/100
AVCC3
RGMSET
RTSET
AGND3
TPOUTN/P
AGND2
AVCC2
TPINN/P
Digital ground.
Digital +5V power supply.
Digital ground.
Recovered receive symbol clock TTL output. This 25MHz clock is phase-aligned
with the internal 125MHz bit clock recovered from the signal received at TPINP/N
when data is present. Receive data at RSM<4:0> change on the falling edges and
should be sampled on the rising edges of this clock. RXC is phase aligned to TXC
when 100BASE-TX signal is not present at TPINP/N
Digital ground.
Digital +5V power supply.
Digital ground.
Digital ground.
Digital ground.
Digital +5V power supply.
Digital ground.
Signal detect TTL output. A high output level indicates 100BASE-TX activity at
TPINP/N with an amplitude exceeding the preset threshold. The signal detect
function is active only in 100Mbps mode, that is when the pin SEL10/100 is low.
Speed select TTL input. Driving this pin high disables 100BASE-TX transmit and
receive functions, and enables the 10BASE-T transmit path from 10BTTXINP/N to
TPOUTP/N. A low signal on SEL10/100 disables the 10BTTXINP/N inputs and enables
100BASE-TX operation.
Analog positive power supply.
Equalizer bias resistor input. An external 9.53kΩ, 1% resistor connected between
RGMSET and AGND3 sets internal time constants controlling the receive equalizer
transfer function.
Transmit level bias resistor input. An external 2.49kΩ, 1% resistor connected
between RTSET and AGND3 sets a precision constant bias current for the twisted
pair transmit level.
Analog ground.
Transmit twisted pair outputs. This differential current output pair drives MLT-3
waveforms into the network coupling transformer in 100BASE-TX mode, and
10BASE-T or FLP waveforms in 10BASE-T mode.
Analog ground.
Analog +5V power supply.
Receive twisted pair inputs. This differential input pair receives 100BASE-TX signals
from the network.
3
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