HFBR-4663 Просмотр технического описания (PDF) - HP => Agilent Technologies

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производитель

HFBR-4663

Single Chip 10BASE-FL Transceiver

HP => Agilent Technologies 

Pin Connection

28 – PIN PCC Q – 28

SQEN/JABD

Rx+

Rx-

LBDIS

VCC

Tx+

Tx-

4 3 2 1 28 27 26

5

25

6

24

7

23

8

22

9

21

10

20

11

19

12 13 14 15 16 17 18

VIN-

AGND

VTHADJ

VREF

VDC

GND

GND

TOP VIEW

Pin Description

Pin Name

1 CLSN

2 COL+

3 COL-

4 CTIMER

5 SQEN/JABD

6 Rx+

7 Rx-

8 LBDIS

9 VCC

10 Tx+

11 Tx-

12 RTSET

13 RRSET

14 LMON

Function

Indicates that a collision is taking place. Active low LED driver, open collector.

Event is extended with internal timer for visibility.

Gated 10 MHz oscillation used to indicate a collision, SQE test, or jabber.

Balanced differential line driver outputs that meet AUI specifications.

A capacitor from this pin to VCC determines the Link Monitor response time.

SQE Test Enable, jabber Disable. When tied low, SQE test is disabled, when tied

high SQE test is enabled. When tied to 2.0 V both SQE test and jabber are

disabled.

Manchester encoded receive data output to the local device. Balanced

differential line driver outputs that meet AUI specifications.

Loopback Disable. When this pin is tied to VCC, the AUI transmit pair data is not

looped back to the AUI receive pair, and collision is disabled. When this pin is

tied to GND (normal operation) or left floating, the AUI transmit pair data is

looped back to the AUI receiver pair, except during collision.

+5 V power input.

Balanced differential line receiver inputs that meet AUI specifications. These

inputs may be transformer or capacitively coupled. The Tx input pins are

internally DC biased for AC coupling.

Sets the current driven output of the transmitter.

A 1% 61.9 kΩ resistor tied from this pin to VCC sets the biasing currents for

internal nodes.

Link Monitor “Low Light” LED status output. This pin is pulled low when the

voltage on the VIN+, VIN- inputs exceed the minimum threshold set by the VTHADJ

pin, and there are transitions on VIN+, VIN- indicating an idle signal or active

data. If either the voltage on the VIN+, VIN- inputs fall below the minimum

threshold or transitions cease on VIN+, VIN-, LMON will go high. Active low LED

driver, open collector.

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