3

SP5768

Electrical Characteristics (continued)

These characteristics are guaranteed by either production test or design. They apply within the specified ambient

temperature and supply voltage unless otherwise stated. Tamb = -40

°C to 80°C, Vcc = +4·5V to +5·5V

Characteristic

Pin

Value

Units

Conditions

Min

Typ

Max

Charge pump output

1

See Table 1

current

Vpin1 = 2V

Charge pump output

1

±3

±10

nA

Vpin1=2V, Vcc = +5.0V,

leakage

Tamb = 25

°C

Charge pump drive

16

0.5

mA

Vpin 16=0.7V

output current

Crystal frequency

2,3

2

20

MHz

See Figure 5 for application

External reference input

3

2

20

MHz

Sinewave coupled through

frequency

10F blocking capacitor

External reference drive

3

0.2

0.5

Vpp

Sinewave coupled through

level

10nF blocking capacitor

Buffered reference

11

AC coupled, See note 1

frequency output

output amplitude

0.35

Vpp

2-20MHz

output impedance

250

Ω

Comparison frequency

4

MHz

Equivalent phase noise

-148

dBc/Hz

At 10 kHz, SSB, with 2 MHz

at phase detector

comparison from 4 MHz

crystal reference

RF division ratio

240

131071

Reference division ratio

2

320

See Table 2

Output ports P0-P3

7,8,9,10

See Note 2

sink current

2

mA

Vport = 0.7V

leakage current

10

µA

Vport = Vcc

1

Reference output disabled by connecting to Vcc if not required

2

Output ports high impedance on power up, with data, clock and enable at logic 0