TNETX3150 datasheet(71/78 Pages) TI

71 / 78 page

TNETX15AE

ADDRESS-LOOKUP DEVICE

SPWS041A – AUGUST 1997 – REVISED OCTOBER 1997

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

timing requirements over recommended operating conditions

OSCIN clock

MIN

NOM

MAX

UNIT

tc(OSCIN)†

Cycle time, OSCIN

tw(OSCINH) Pulse duration, OSCIN high

tw(OSCINL)

Pulse duration, OSCIN low

Frequency drift†

±50

ppm

† TNETX15AE is designed to use the OSCIN input from the companion TNETX3150/TNETX3150A/TNETX3100 to be able to snoop on the

TNETX3150/TNETX3150A/TNETX3100-DRAM bus. The accuracy and drift are constrained by TNETX3150/TNETX3150A/TNETX3100 use of

OSCIN for Ethernet state machines.

timing requirements over recommended operating conditions (see Figure 24)

power-on reset

NO.

MIN

MAX

UNIT

td(OSCIN)

Delay time, from VCC↑ to RESET↑

td(RESET)

Delay time, from OSCIN

↑ to RESET↑

td(AUTO)

Delay time, from RESET

↑ to EEPROM autoload over

OSCIN

(Input)

VCC(5V)

(Input)

VCC

(Input)

RESET

(Input)

Normal Operation

Signals‡

Valid

‡ A pullup or active logic is required for each input to have known logic levels at all times, especially during reset when an I/O output is disabled.

Figure 24. Power-On Reset Timing

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