GTL2010PW-T 查看數據表（PDF） - Philips Electronics
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GTL2010PW-T Datasheet PDF : 24 Pages
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Calculating Pull-Up Resistor Values
The pull-up resistor value needs to limit the current through the pass transistor when it is in the "on" state to about 15
mA. This will guarantee a pass voltage of 260 to 350 mV. If the current through the pass transistor is higher than 15
mA, the pass voltage will also be higher in the "on" state. To set the current through each pass transistor at 15 mA,
calculate the pull-up resistor value as follows:
Vpull-up (in V) - 0.350 V
Resistor Value (in Ω) =
0.015 A
Table 3 below summarizes resistor values for various reference voltages and currents at 15 mA and also at 10 mA and 3
mA. The resistor value shown in the highlighted box or a larger value should be used to ensure that the pass voltage of
the transistor would be 350 mV or less. The external driver must be able to sink the total current from the resistors on
both sides of the GTL-TVC device at 0.175 V, although the 15 mA only applies to current flowing through the GTL-
TVC device.
Voltage
5.0 V
3.3 V
2.5 V
1.8 V
1.5 V
1.2 V
Pull Up Resistor value (ohms)
15 mA
10 mA
Nominal
+ 10 %
Nominal
+ 10 %
310
341
465
512
197
217
295
325
143
158
215
237
97
106
145
160
77
85
115
127
57
63
85
94
3 mA
Nominal
+ 10 %
1550
1705
983
1082
717
788
483
532
383
422
283
312
1) Calculated for Vol = 0.35 V
2) Assumes output driver Vol = 0.175 V at stated current.
3) + 10 % to compensate for VDD range and resistor tolerance.
Alternate Sources
Table 3. Pull Up Resistor Values
The Texas Instruments TVC devices operate the same as the Philips Semiconductors GTL-TVC devices but have
different names for the connections as shown in table 4. The data sheet specifications are marginally different. The Texas
Instruments TVC devices are CMOS construction.
Philips Semiconductors GTL-TVC
GREF
DREF
SREF
Texas Instruments TVC
GATE
Vbias
Vref
Table 4. Device Pin Name Comparison
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