ADN2819

Rev. B | Page 7 of 24

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

PIN 1

INDICATOR

TOP VIEW

ADN2819

THRADJ 1

VCC 2

VEE 3

VREF 4

PIN 5

NIN 6

SLICEP 7

SLICEN 8

VEE 9

LOL 10

XO1 11

XO2 12

36 VCC

35 VCC

34 VEE

33 VEE

32 SEL0

31 SEL1

30 SEL2

29 VEE

28 VCC

27 VEE

26 VCC

25 CF2

Figure 2. 48-Lead LFCSP Pin Configuration

Table 3. Pin Function Descriptions

Pin Number

Mnemonic

Type1

Description

1

THRADJ

AI

LOS Threshold Setting Resistor.

2, 26, 28, Pad

VCC

P

Analog Supply.

3, 9, 16, 19, 22, 27,

29, 33, 34, 42, 43, 46

VEE

P

Ground.

4

VREF

AO

Internal VREF Voltage. Decouple to GND with 0.1 µF capacitor.

5

PIN

AI

Differential Data Input.

6

NIN

AI

Differential Data Input.

7

SLICEP

AI

Differential Slice Level Adjust Input.

8

SLICEN

AI

Differential Slice Level Adjust Input.

10

LOL

DO

Loss of Lock Indicator. LVTTL active high.

11

XO1

AO

Crystal Oscillator.

12

XO2

AO

Crystal Oscillator.

13

REFCLKN

DI

Differential REFCLK Input. LVTTL, LVCMOS, LVPECL, LVDS (LVPECL, LVDS only at 155.52 MHz).

14

REFCLKP

DI

Differential REFCLK Input. LVTTL, LVCMOS, LVPECL, LVDS (LVPECL, LVDS only at 155.52 MHz).

15

REFSEL

DI

Reference Source Select. 0 = on-chip oscillator with external crystal; 1 = external clock source, LVTTL.

17

TDINP

AI

Differential Test Data Input. CML.

18

TDINN

AI

Differential Test Data Input. CML.

20, 47

VCC

P

Digital Supply.

21

CF1

AO

Frequency Loop Capacitor.

23

REFSEL1

DI

Reference Frequency Select (See Table 6) LVTTL.

24

REFSEL0

DI

Reference Frequency Select (See Table 6) LVTTL.

25

CF2

AO

Frequency Loop Capacitor.

30

SEL2

DI

Data Rate Select (See Table 5) LVTTL.

31

SEL1

DI

Data Rate Select (See Table 5) LVTTL.

32

SEL0

DI

Data Rate Select (See Table 5) LVTTL.

35, 36

VCC

P

Output Driver Supply.

37

DATAOUTN

DO

Differential Retimed Data Output. CML.

38

DATAOUTP

DO

Differential Retimed Data Output. CML.

39

SQUELCH

DI

Disable Clock and Data Outputs. Active high. LVTTL.

40

CLKOUTN

DO

Differential Recovered Clock Output. CML.

41

CLKOUTP

DO

Differential Recovered Clock Output. CML.

44

BYPASS

DI

Bypass CDR Mode. Active high. LVTTL.

45

SDOUT

DO

Loss of Signal Detect Output. Active high. LVTTL.

48

LOOPEN

DI

Enable Test Data Inputs. Active high. LVTTL.