Philips Semiconductors

Product specification

NE83C92

Low-power coaxial Ethernet transceiver

1995 May 1

5

TIMING CHARACTERISTICS

LIMITS

SYMBOL

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Receiver start up delay RXI to RX

± (Figure 3)

First received bit on RX

±

3

5

bits

First validly timed bit on RX

±

bits

Receiver prop. delay RXI to RX

±

20

50

ns

Differential output rise time on RX

5

7

ns

Differential output fall time on RX

5

7

ns

Differential output settling time on RX

± and CD±

1

µs

Receiver and cable total jitter

±2

±6

ns

Receiver high to idle time

Measured to +210mV

200

850

ns

Rise and fall time matching on RX+ and CD+

0.1

±2

ns

Transmitter start-up delay TX

± to TXO (Figure 5)

First transmitted bit on TXO

1

2

bits

First validly timed bit

bits

Transmitter prop delay TX

± to TXO

(see Figure 5)

5

20

50

ns

Transmitter rise time 10% to 90% (see Figure 5)

20

25

30

ns

Transmitter fall time 10% to 90% (see Figure 5)

20

25

30

ns

0

±2

ns

0

±2

ns

Transmitter turn on pulse width (see Figure 5)

10

35

ns

Transmitter turn off pulse width (see Figure 5)

125

200

ns

Collision turn on delay (see Figure 6)

0V to –2V step at RXI

13

bits

Collision turn off delay (see Figure 6)

–2V to 0V step at RXI

16

bits

Collision high to idle time (see Figure 6)

Measured to +210mV

200

850

ns

Collision frequency (see Figure 6)

8.5

10

11.5

MHz

Collision signal pulse width (see Figure 6)

35

70

ns

Heartbeat turn on delay (see Figure 7)

0.6

1.6

µs

Heartbeat test duration (see Figure 7)

0.5

1.5

µs

Jabber activation delay measured from TX

± to

CD

± (see Figure 8)

20

60

ms

Jabber reset delay measured from TX

± to CD±

(see Figure 8)

250

650

ms

NOTES:

2. Measured on secondary side of isolation transformer (see Figure 2). The transformer has a 1:1 turn ratio with an inductance between 30

and 100

µH at 5MHz.

3. The rise and fall times are measured as the time required for the differential voltage to change from –225mV to +225mV, or +225mV to

–225mV, respectively.

4. Difference in propagation delay between rising and falling edges at TXO.

5. Not 100% tested in production.