KSZ8051MNL Datasheet, PDF (10/66 Pages) Micrel Semiconductor – 10Base-T/100Base-TX Physical Layer Transceiver

KSZ8051MNL/RNL
FIGURE 2-2:
32-PIN 5 MM X 5 MM QFN ASSIGNMENT, KSZ8051RNL (TOP VIEW)
32 31 30 29 28 27 26 25
GND ¹
VDD_1.2 2
VDDA_3.3 3
RXM 4
RXP ⁵
TXM 6
Paddle
Ground
(on bottom of chip)
24 _TXD0
23 TXEN
22 NC
21 INTRP/NAND_Tree#
20 _RXER/ISO
19 REF_CLK/B-CAST_OFF
TXP 7
XO 8
18 CRS_DV/CONFIG2
17 VDDIO
9 10 11 12 13 14 15 16
TABLE 2-3: SIGNALS - KSZ8051RNL
Pin
Number
1
2
3
4
5
6
7
8
9
10
Pin Name
GND
VDD_1.2
VDDA_3.3
RXM
RXP
TXM
TXP
XO
XI
REXT
Type
Note 2-1
Description
GND Ground.
P
1.2V core V_DD (power supplied by KSZ8091RNB)
Decouple with 2.2 µF and 0.1 µF capacitors to ground.
P
3.3V analog V_DD
I/O Physical receive or transmit signal (– differential)
I/O Physical receive or transmit signal (+ differential)
I/O Physical transmit or receive signal (– differential)
I/O Physical transmit or receive signal (+ differential)
O
Crystal feedback for 25 MHz crystal
This pin is a no connect if an oscillator or external clock source is used.
I
25 MHz Mode: 25 MHz ±50 ppm Crystal/Oscillator/External Clock Input
50 MHz Mode: 50 MHz ±50 ppm Oscillator/External Clock Input
I
Set PHY transmit output current
Connect a 6.49 kΩ resistor to ground on this pin.
DS00002310A-page 10
 2016 Microchip Technology Inc.