PC87393 datasheet(137/148 Pages) NSC

137 / 148 page

9.0 Device Characteristics (Continued)

137

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9.2.5

Input, TTL Compatible with Schmitt Trigger

Symbol: INTS

9.2.6

Output, PCI 3.3V

Symbol: OPCI

9.2.7

Output, Totem-Pole Buffer

Symbol: Op/n

Output, Totem-Pole buffer that is capable of sourcing

p mA and sinking n mA

9.2.8

Output, Open-Drain Buffer

Symbol: ODn

Output, Open-Drain output buffer, capable of sinking

n mA. Output from these signals is open-drain and cannot be forced high.

9.2.9

Exceptions

1. All pins are back-drive protected, except for the output pins with PCI Buffer Type.

2. The following pins have a PU220 internal pull-up resistor and therefore have input leakage current to VDD: ACK,

AFD_DSTRB, ERR, INIT, PE, SLIN_ASTRB, STB_WRITE.

3. The following pins have a PU25 internal pull-up resistor and therefore have input leakage current to VDD: GPIO40-47,

GPIO30-37, GPIO20-27, GPIO10-17, GPIO00-07.

4. The following pins have a PD120 internal pull-down resistor and therefore have input leakage current to GND:

BUSY_WAIT, PE, SLCT.

5. Output from SLCT, BUSY_WAIT (and PE if bit 2 of PP Confg0 Register is 0) is open-drain in all SPP modes, except in

SPP Compatible mode when the setup mode is ECP-based FIFO and bit 4 of the Control2 parallel port register is 1.

Otherwise, output from these signals is level 2. External 4.7 K

Ω pull-up resistors should be used.

Symbol

Parameter

Conditions

Min

Max

Unit

VIH

Input High Voltage

2.0

5.51

1. Not tested. Guaranteed by design.

VIL

Input Low Voltage

−0.5 1

0.8

IIL

Input Leakage Current

VIN =VDD

µA

VIN =VSS

−10

µA

Input Hysteresis

250

Symbol

Parameter

Conditions

Min

Max

Unit

VOH

Output High Voltage

lout = -500 µA

0.9VDD

VOL

Output Low Voltage

lout =1500 µA

0.1 VDD

Symbol

Parameter

Conditions

Min

Max

Unit

VOH

Output High Voltage

IOH = −p mA

2.4

VOL

Output Low Voltage

IOL = n mA

0.4

Symbol

Parameter

Conditions

Min

Max

Unit

VOL

Output Low Voltage

IOL = n mA

0.4

PC87393 Datasheet(PDF) 137 Page - National Semiconductor (TI)

PC87393 Datasheet(HTML) 137 Page - National Semiconductor (TI)

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