HDMP-1638 Ver la hoja de datos (PDF) - HP => Agilent Technologies

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Fabricante

HDMP-1638

Gigabit Ethernet Transceiver Chip with Dual Serial I/O and Differential PECL Clock Inputs

HP => Agilent Technologies 

16

NAME

PIN

TX[0]

2

TX[1]

3

TX[2]

4

TX[3]

5

TX[4]

6

TX[5]

7

TX[6]

8

TX[7]

9

TX[8]

10

TX[9]

11

TXCAP0

17

TXCAP1

16

SIG_DET

26

VCC_RX

28

58

VCC_RXA

50

VCC_RXHS

54

VCC_RXTTL

29

37

42

VCC_TX

20

VCC_TXA

18

VCC_TXECL

61

VCC_TXHS

64

TYPE

I-TTL

SIGNAL

Data Inputs: One 10 bit, 8B/10B encoded data byte. TX[0]

is the first bit transmitted. TX[0] is the least significant bit.

C

O-TTL

S

S

S

S

Loop Filter Capacitor: A loop filter capacitor must be

connected across the TXCAP1 and TXCAP0 pins (typical

value=0.1 µF).

Signal Detect: Indicates a loss of signal on the high-speed

differential inputs, ± DINB, as in the case where the

transmission cable becomes disconnected.

If ± DIN>=200 mV peak-to-peak, SIG_DET=logic 1.

If ± DIN<200 mV and ± DIN>50 mV, SIG_DET=undefined.

If ± DIN<=50 mV, SIG_DET=logic 0.

Logic Power Supply: Normally 3.3 volts. Used for

internal receiver PECL logic. It should be isolated from

the noisy TTL supply as well as possible.

Analog Power Supply: Normally 3.3 volts. Used to provide

a clean supply line for the PLL and high speed analog cells.

High Speed Supply: Normally 3.3 volts. Used only for

the high speed receiver cell (HS_IN). Noise on this line

should be minimized for best operation.

TTL Power Supply: Normally 3.3 volts. Used for all TTL

receiver output buffer cells.

S

Logic Power Supply: Normally 3.3 volts. Used for

internal transmitter PECL logic. Also used for all

transmitter TTL input buffer cells.

S

Analog Power Supply: Normally 3.3 volts. Used to provide

a clean supply line for the PLL and high speed analog cells.

S

High Speed ECL Supply: Normally 3.3 volts. Used only

for the last stage of the high speed transmitter output cell

(HS_OUT) as shown in Figure 10. Due to high current transi-

tions, this VCC should be well bypassed to a ground plane.

S

High Speed Supply: Normally 3.3 volts. Used by the

transmitter side for the high speed circuitry. Noise on this

line should be minimized for best operation.

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