I347-AT4 Datasheet, PDF (115/148 Pages) Intel Corporation – Intel® Ethernet Network Connection I347-AT4 Datasheet

Electrical and Timing Specifications—I347-AT4
CIN
Input
All pins
capacitance
5
pF
5.3.2
IEEE DC Transceiver Parameters
IEEE tests are typically based on template and cannot simply be specified by a number.
For an exact description of the template and the test conditions, refer to the IEEE
specifications.
• 10BASE-T IEEE 802.3 Clause 14
• 100BASE-TX ANSI X3.263-1995
Note:
Over full range of values listed in Section 5.1 unless otherwise specified.
Symbol
Parameter
Pins
Condition
Min
Typ
Max
Units
V_ODIFF
Absolute peak
differential
output voltage
Overshoot²
MDIP/N[1:0]
MDIP/N[1:0]
MDIP/N[1:0
MDIP/N[3:0]
MDIP/N[1:0]
10BASE-T no cable
10BASE-T cable model
100BASE-TX mode
1000BASE-T²
100BASE-TX mode
2.2
585¹
0.950
0.67
0
2.5
1.0
0.75
2.8
V
mV
1.050 V
0.82
V
5%
V
Amplitude
Symmetry
(positive/
negative)
MDIP/N[1:0]
100BASE-TX mode
0.98x
1.02x V+/V-
Peak
Differential
MDIP/N[1:0]
10BASE-T mode
585³
mV
Input Voltage
V_IDIFF
Signal Detect
Assertion
MDIP/N[1:0]
100BASE-TX mode
1000
460⁴
mV
peak-
peak
Signal Detect
De-assertion
MDIP/N[1:0]
100BASE-TX mode
200
360⁵
mV
peak-
peak
1. IEEE 802.3 Clause 14, Figure 14.9 shows the template for the “far end” wave form. This template allows as little as 495 mV
peak differential voltage at the far end receiver.
2. IEEE 802.3ab Figure 40 -19 points A&B.
3. The input test is actually a template test ; IEEE 802.3 Clause 14, Figure 14.17 shows the template for the receive wave form.
4. The ANSI TP-PMD specification requires that any received signal with peak-to-peak differential amplitude greater than 1000
mV should turn on signal detect (internal signal in 100BASE-TX mode). The I347-AT4 accepts signals typically with 460 mV
peak-to-peak differential amplitude.
5. The ANSI-PMD specification requires that any received signal with peak-to-peak differential amplitude less than 200 mV
should de-assert signal detect (internal signal in 100BASE-TX mode). The I347-AT4 rejects signals typically with peak-to-
peak differential amplitude less than 360 mV.
5.3.3
SGMII Interface
The I347-AT4 adds flexibility by enabling the programmable output voltage swing and
supply voltage option as described in Section 2.3.
105