HDMP-1685A 参数 Datasheet PDF下载

HDMP-1685A Timing Characteristics – Transmitter Sections

T

A

= 0°C to T

C

= 85°C, V

CC

= 3.15 V to 3.45 V

Symbol

t

TXCT[2]

t

TXCV[2]

t_txlat

[1]

Parameter

TX [0:3][0:4] Input Data and TC Clock Transition Range

TX [0:3][0:4] Input Data and TC Clock Valid Time

Transmitter Latency

Units

ps

ps

ns

bits

2400

4

5

Min.

Typ.

Max.

1600

Note:

1. The transmitter latency, as shown in Figure 4, is defined as the time between the leading edge of the first half of a parallel 10-bit word and the

leading edge of the first transmitted serial output bit of that 10-bit word.

2. Agilent‘s HDMP-1685A internally generates another clock which is 90 degrees out of phase with the TC clock supplied. This clock, which will

have its edges at the center of the data valid eye, is used to clock in the TX[0:4] data. Setup and hold times are taken care of by the

HDMP-1685A provided the specifications indicated are met.

8 ns

TXCT

TX[0:3][0:4]

TXCV

TXCV

TC

Figure 3. Transmitter section parallel input timing.

10-BIT CHAR A

10-BIT CHAR B

SO

[0:3]

±

TX[0]

TXLAT

TX[9]

TX

[0:3]

[0:4]

CHAR B[4:0]

CHAR B[9:5]

TC

Figure 4. Transmitter section latency. TX[0] is first on serial wire.

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