Receiver Switching Characteristics

Over recommended operating supply and temperature ranges unless otherwise specified.

Symbol

Parameter

Condition/

Min

Typ

Max

Units

 

 

Reference

 

 

 

 

 

 

 

 

 

 

 

CLHT

LVCMOS/LVTTL Low-to-High Transition

Rx clock out

 

1.45

2.10

ns

 

Time, CL = 8pF, (Figure 5) (Note 8)

 

 

 

 

 

 

Register addr 28d/1ch,

 

 

 

 

 

 

bit [2] (RCLK)=0b (Default),

Rx data out

 

2.40

3.50

ns

 

bit [1] (RXE) =0b (Default),

 

 

 

 

 

 

bit [0] (RXO) =0b (Default)

 

 

 

 

 

 

 

 

 

 

 

 

CHLT

LVCMOS/LVTTL High-to-Low Transition

Rx clock out

 

1.35

2.20

ns

 

Time, CL = 8pF, (Figure 5) (Note 8)

 

 

 

 

 

 

Register addr 28d/1ch,

 

 

 

 

 

 

bit [2] (RCLK)=0b (Default),

 

 

 

 

 

 

Rx data out

 

2.40

3.60

ns

 

bit [1] (RXE) =0b (Default),

 

 

 

 

 

 

bit [0] (RXO) =0b (Default)

 

 

 

 

 

 

 

 

 

 

 

 

CLHT

LVCMOS/LVTTL Low-to-High Transition

Rx clock out

 

2.45

 

ns

Programmable

Time, CL = 8pF, (Figure 5) (Note 8)

 

 

 

 

 

adjustment

Register addr 28d/1ch,

 

 

 

 

 

 

bit [2] (RCLK)=1b (Default),

Rx data out

 

3.40

 

ns

 

bit [1] (RXE) =1b (Default),

 

 

 

 

 

 

bit [0] (RXO) =1b (Default)

 

 

 

 

 

 

 

 

 

 

 

 

CHLT

LVCMOS/LVTTL High-to-Low Transition

Rx clock out

 

2.35

 

ns

Programmable

Time, CL = 8pF, (Figure 5) (Note 8)

 

 

 

 

 

adjustment

Register addr 28d/1ch,

 

 

 

 

 

 

bit [2] (RCLK)=0b (Default),

 

 

 

 

 

 

Rx data out

 

3.40

 

ns

 

bit [1] (RXE) =0b (Default),

 

 

 

 

 

 

bit [0] (RXO) =0b (Default)

 

 

 

 

 

 

 

 

 

 

 

 

RCOP

RCLK OUT Period (Figures 11, 12) (Note 8)

8–135 MHz

7.4

T

125

ns

 

 

 

 

 

 

 

RCOH

RCLK OUT High Time (Figures 11, 12)

Rx clock out

0.4T

0.5T

0.6T

ns

 

 

 

 

 

 

 

RCOL

RCLK OUT Low Time (Figures 11, 12)

Rx clock out

0.4T

0.5T

0.6T

ns

 

 

 

 

 

 

 

RSRC

RxOUT Setup to RCLK OUT (Figures 11, 12) (Notes 8, 9)

2.60

0.5T

 

ns

 

Register addr 29d/1dh [2:1]= 00b (Default)

 

 

 

 

 

 

 

 

 

 

 

 

RHRC

RxOUT Hold to RCLK OUT (Figures 11, 12) (Notes 8, 9)

3.60

0.5T

 

ns

 

Register addr 29d/1dh [2:1]= 00b (Default)

 

 

 

 

 

 

 

 

 

 

 

 

RSRC/RHRC

Register addr 29d/1dh [2:1] = 01b, (Figures 13, 14)

 

+1UI /

 

ns

Programmable

(Notes 2, 10)

 

 

-1UI

 

 

Adjustment

RSRC increased from default by 1UI

 

 

 

 

 

 

RHRC decreased from default by 1UI

 

 

 

 

 

 

 

 

 

 

 

 

 

Register addr 29d/1dh [2:1] = 10b, (Figures 13, 14)

 

-1UI /

 

ns

 

(Notes 2, 10)

 

 

+1UI

 

 

 

RSRC decreased from default by 1UI

 

 

 

 

 

 

RHRC increased from default by 1UI

 

 

 

 

 

 

 

 

 

 

 

 

 

Register addr 29d/1dh [2:1] = 11b, (Figures 13, 14)

 

+2UI /

 

ns

 

(Notes 2, 10)

 

 

-2UI

 

 

 

RSRC increased from default by 2UI

 

 

 

 

 

 

RHRC decreased from default by 2UI

 

 

 

 

 

 

 

 

 

 

 

 

RPLLS

Receiver Phase Lock Loop Set (Figure 6)

 

 

 

10

ms

 

 

 

 

 

 

 

RPDD

Receiver Powerdown Delay (Figure 7)

 

 

 

100

ns

 

 

 

 

 

 

 

RPDL

Receiver Propagation Delay — Latency (Figure 8)

 

 

4*RCLK

ns

 

 

 

 

 

 

 

RITOL

Receiver Input Tolerance

VCM = 1.25V,

 

 

0.25

UI

 

(Figures 10, 16) (Notes 8, 10)

VID = 350mV

 

 

 

 

Note 8: Specification is guaranteed by characterization.

Note 9: A Clock Unit Symbol (T) is defined as 1/ (Line rate of RCLK). E.g. For Line rate of RCLK at 85MHz, 1 T = 11.76ns

Note 10: A Unit Interval (UI) is defined as 1/7th of an ideal clock period (RCLK/7). E.g. For an 11.76ns clock period (85MHz), 1 UI = 1.68ns

DS90C3202

5

www.national.com

Page 5
Image 5
National Products DS90C3202 Receiver Switching Characteristics, Symbol Parameter Condition Min Typ Max Units Reference