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TNETX3270
ThunderSWITCH 24/3 ETHERNET SWITCH
WITH 24 10-MBIT/S PORTS AND 3 10-/100-MBIT/S PORTS
SPWS043B – NOVEMBER 1997 – REVISED APRIL 1999
51
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating junction temperature range (unless otherwise noted)
†
Supply voltage range: V
DD(2.5V)
–0.5 V to 2.7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
V
DD(3.3V)
–0.5 V to 3.6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, V
I
: Standard –0.5 V to V
DD(3.3V)
+ 0.4 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, V
O
: Standard –0.5 V to V
DD(2.5V)
+ 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal impedance: Junction-to-ambient package, airflow = 0, Z
θJA
15°C/W. . . . . . . . . . . . . . . . . . . . . . . . . .
Junction-to-ambient package, airflow = 150 fpm, Z
θJA
11.5°C/W. . . . . . . . . . . . . . . . . . .
Junction-to-case package, 0 Z
θJC
1.08°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating case temperature range, T
C
0°C to 95°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. Applies to external input buffers. Level-shifting inputs are relative to V
DD(3.3V)
.
2. Applies to external output buffers. Level-shifting outputs are relative to V
DD(3.3V)
.
recommended operating conditions
MIN NOM MAX UNIT
V
DD(2.5V)
Supply voltage 2.3 2.5 2.7 V
V
DD(3.3V)
Supply voltage 3 3.3 3.6 V
V
IH
High-level dc input voltage 2.3 3.3 V
V
IL
Low-level dc input voltage 0 0.65 V
I
OH
High-level output current –2 mA
I
OL
Low-level output current –2 mA
electrical characteristics over recommended operating conditions (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
OH
High-level output voltage I
OH
= rated 2.5 V
V
OL
Low-level output voltage I
OL
= rated 0.5 V
I
IH
High-level input current V
I
= V
DD(3.3V)
1 µA
I
IL
Low-level input current V
I
= GND –1 µA
I
OZ
High-impedance-state output current V
O
= V
DD(3.3V)
, V
O
= 0 ±10 µA
I
DD(2.5V)
Supply current V
DD(2.5V)
= max, f = 83.33 MHz 1.5 A
I
DD(3.3V)
Supply current V
DD(3.3V)
= max, f = 83.33 MHz 0.175 A
C
i
Capacitance, input 6 pF
C
o
Capacitance, output 6 pF