Detailed Specifications

STV0674

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4.7

SFP AC parameters

Each SFP is a TTL schmitt trigger bidirectional pad Buffer, 3v3 capable with 2mA drive capability

and Slew-rate Control. The 3.3V IOs comply to the EIA/JEDEC standard JESD8-B. For sake of

convenience the most important parameters for measurement have been extracted and presented

below.

4.8

Sensor interface

Note: 1 The above timings assume that the sensor_clk load is 20pF.

2 The sensor data setup and hold times are requirements of the STV0674.

STV0674 sensor data pads. (i.e. STV0674 pad to sensor PCB delay + sensor clock to data delay +

sensor data pad to STV0674 pad PCB delay).

Table 7: SFP AC parameters

Symbol

Description

Min.

Typ.

Max.

Unit

Slew_rise

0.3Vcc to 0.6Vcc, CL = 10pF,

balanced RL = 1KR to Vdd

with RL = 1KR to Vss

1.63

1.83

1.97

V/ns

Slew_fall

0.3Vcc to 0.6Vcc, CL = 10pF,

balanced RL = 1KR to Vdd

with RL = 1KR to Vss

2.05

2.32

2.62

V/ns

Figure 12: Sensor interface timing

Table 8: Sensor interface timing

Symbol

Min.

Typ.

Max.

Unit

0.1875

24

MHz

40.02

40.02

7.71

ns

0ns

32.39

ns

sensor_clk

sensor_db[4:0]