ST70137 查看數據表（PDF） - STMicroelectronics

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ST70137

UNICORN™ PCI & USB CONTROLLERLESS ADSL DMT TRANSCEIVER

STMicroelectronics 

Rise and Fall Time Measures

TR

TF

90%

90%

ST70137

10%

10%

Input / Output TTL Generic Characteristics

The value presented in the following table apply for all TTL inputs and/or outputs unless otherwise

specified.

Symbol

Parameter

Test Condition

Minimum Typical Maximum Units

VIL Low Level Input Voltage

VIH High Level Input Voltage

2.0

VILHY Low Level Threshold, falling *

Slow edge < 1V/µs

0.9

VIHHY Low Level Threshold, rising *

Slow edge < 1V/µs

1.3

VHY Schmitt Trigger Hysteresis *

Slow edge < 1Vµs

0.4

VOL Low Level Output Voltage

IOUT = XmA (see Note)

VOH High Level Output Voltage

IOUT = XmA (see Note)

2.4

0.8

V

V

1.35

V

1.9

V

0.7

V

0.4

V

V

* Guaranted by design.

Note: The reference current is dependent on the exact buffer chosen and is a part of the buffer name.

The available values are 2, 4 and 8mA.

20/22

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