OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

78Q2123SR/F

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P38
DS_21x3_001 78Q2123/78Q2133 Data Sheet
Rev. 1.6 25
4.5 Digital Timing Characteristics
4.5.1 RST Characteristics
T
reset
VCC
Oscillator
RST
Figure 1: RST Pulse Duration
Parameter Symbol Conditions Min Nom Max Unit
RST Pulse Assertion Treset VCC = 3.3V and
oscillator stabilized
30 Oscillator
Clock
Cycles
4.5.2 MII Transmit Interface
Characteristics Symbol Conditions Min Nom Max Unit
Setup Time: TX_CLK to
TXD[3:0], TX_EN, TX_ER
TX
SU
15 ns
Hold Time: TX_CLK to
TXD[3:0], TX_EN, TX_ER
TX
HD
0 ns
CKIN-to-TX_CLK Delay T
CKIN
0 40 ns
TX_CLK Duty-Cycle 40 60 %
Figure 2: Transmit Inputs to the 78Q2123/78Q2133
78Q2123/78Q2133 Data Sheet DS_21x3_001
26 Rev. 1.6
4.5.3 MII Receive Interface
Characteristics Symbol Conditions Min Nom Max Unit
Receive Output Delay:
RX_CLK to RXD[3:0],
RX_DV, RX_ER
RX
DLY
10 30 ns
RX_CLK Duty-Cycle 40 60 %
Figure 3: Receive Outputs from the 78Q2123/78Q2133
4.6 MDIO Interface Input Timing
Characteristics Symbol Conditions Min Nom Max Unit
Setup Time: MDC to MDIO
MIO
SU
10 ns
Hold Time: MDC to MDIO MIO
HD
10 ns
Max Frequency: MDC F
max
25 MHz
Figure 4: MDIO as an Input to the 78Q2123/78Q2133
DS_21x3_001 78Q2123/78Q2133 Data Sheet
Rev. 1.6 27
4.6.1 MDIO Interface Output Timing
Characteristics Symbol Conditions Min Nom Max Unit
MDC to MDIO data delay MC2D 30 ns
MDIO output from high Z
to driven after MDC
MCZ2D 30 ns
MDIO output from driven
to high Z after MDC
MCD2Z 30 ns
Figure 5: MDIO as an Output to the 78Q2123/78Q2133
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P36P37-P38

78Q2123SR/F

Mfr. #:
Buy 78Q2123SR/F
Manufacturer:
Maxim Integrated
Description:
Ethernet ICs 10/100 Base Tx Transcvr w/MDIX
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet