Datasheet

ENC424J600/624J600
DS39935C-page 144  2010 Microchip Technology Inc.
TABLE 17-4: INTERNAL VOLTAGE REGULATOR SPECIFICATIONS
TABLE 17-5: REQUIREMENTS FOR EXTERNAL MAGNETICS
IPD Power-Down Current
(2)
Energy Detect Power-Down — 29.2 34 mA PHCON2<13> = 1
Sleep — 23.8 28 mA PHCON1<11> = 1
VTPOUT Peak Differential Output Voltage V
100Base-TX 0.95 1.00 1.05 V
(Note 3)
10Base-T 2.2 2.5 2.8 V (Note 3)
VSQ 10Base-T RX Differential Squelch
Threshold
160 300 585 mV
Operating Conditions: -40°C < TA < +85°C (unless otherwise stated)
Param
No.
Symbol Characteristics Min Typ Max Units Comments
VRGOUT Regulator Output Voltage 1.62 1.80 1.98 V
C
EFC External Filter Capacitor
Value
4.7 10 — F Capacitor must have low
series resistance (< 3

Parameter Min Norm Max Units Conditions
RX Transformer Turns Ratio — 1:1 — —
TX Transformer Turns Ratio — 1:1 — — Transformer Center Tap = 3.3V
Insertion Loss — — 1.1 dB
Primary Inductance 350 — —
H 8 mA bias
Transformer Isolation — 1.5 — kV
Differential to Common-Mode Rejection 40 — — dB 0.1 to 10 MHz
Return Loss -16 — — dB
TABLE 17-3: DC CHARACTERISTICS: ENC424J600/624J600 (INDUSTRIAL) (CONTINUED)
DC CHARACTERISTICS
Standard Operating Conditions:
-40°C  TA  85°C, 3.0V  VDD  3.6V (Industrial)
Param.
No.
Sym Characteristic Min Typ Max Units Conditions
Note 1:
Excludes TX transformer center tap and LEDA/LEDB currents; cryptographic engine module disabled
(EIR<15> =
0).
2: Cryptographic engine module disabled (EIR<15> = 0), auto-negotiation disabled (PHCON1<12> = 0) and
Ethernet disabled (ECON2<15> =
0).
3: Measured across 100Ω termination on cable side of transformer.