78Q2120C Ver la hoja de datos (PDF) - TDK Corporation

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78Q2120C

10/100BASE-TX Transceiver

TDK Corporation 

78Q2120C

10/100BASE-TX Transceiver

Pins of type CIS:

PARAMETER

Low-to-High Threshold

High-to-Low Threshold

Input Current

Input Capacitance

SYMBOL

Vt+

Vt-

Iil, Iih

Cin

CONDITIONS

Pins of type CO, COZ, CIO:

PARAMETER

Output Voltage Low

Output Voltage High

Output Transition Time

Tristate Output Leakage

Current

SYMBOL

Vol

Voh

Tt

Iz

CONDITIONS

Iol = 8mA

Ioh = -8mA

CL = 20pF

Type COZ only

DIGITAL TIMING CHARACTERISTICS

MII Transmit Interface

CHARACTERISTICS

Setup Time: TX_CLK to

TXD[3:0], TX_EN, TX_ER

Hold Time: TX_CLK to

TXD[3:0], TX_EN, TX_ER

CKIN-to-TX_CLK Delay

TX_CLK Duty-Cycle

SYMBOL

TXSU

TXHD

TCKIN

CONDITIONS

MIN

NOM

MAX UNIT

1.3

1.7

V

0.80

1.20

V

-1

1

µA

8

pF

MIN

NOM

MAX UNIT

0.4

V

2.4

V

6

ns

-1

1

µA

MIN

NOM MAX

UNIT

15

ns

0

ns

0

40

ns

40

60

%

CKIN

TX_CLK

TXD[3:0]

TX_EN

or

TX_ER

TXSU

TCKIN

TXHD

Transmit Inputs to the 78Q2120C

© 2003 TDK Semiconductor Corporation, Proprietary and Confidential

- 21 -

Rev_1.1

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