Texas Instruments THUNDERSWITCH II TNETX4090 - Manual (Page 61)

TNETX4090
ThunderSWITCH II

9-PORT 100-/1000-MBIT/S ETHERNET

SWITCH
SPWS044E – DECEMBER 1997 – REVISED AUGUST 1999
61
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VOH High-level output voltage IOH = rated VDD(3.3)–0.5 V
VOL Low-level output voltage IOL = rated 0.5 V
IOZ
High-impedance-state output
current
VO = VDD or GND
±
10
µ
A
IIH High-level input current VI = VIH 1 µ A
IIL Low-level input current VI = VIL –1
µ
A
VOHR High-level output voltage (RSL) IOH 2 VDD V
VOLR Low-level output voltage (RSL) 0 0.4 V
IDD(2.5V)
VDD(2.5V) = max,
DTX_CLK and DRX_CLKf = 83.33 MHz
1.5
IDD(3.3V) Supply current
VDD(3.3V) = max,
DTX_CLK and DRX_CLKf = 83.33 MHz
0.5 A
IDD(2.5)
VDD(2.5) = max,
DTX_CLK and DRX_CLKf = 83.33 MHz
0.175
Ci Capacitance, input 6 pF
Co Capacitance, output 6 pF
timing requirements over recommended operating conditions
JTAG interface
control signals
RESET (see Figure 15)
NO. MIN MAX UNIT
1 tw(RESETP) Pulse duration, RESET low at power up 100
µ
s
1 tw(RESET) Pulse duration, RESET low at other times 4 tcycle
1
RESET
Figure 15. RESET