4

SP5748 Advance Information

ELECTRICAL CHARACTERISTICS

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

ambient temperature and supply voltage unless otherwise stated.

T

Characteristic

Pin

Value

Units

Conditions

Min

Typ

Max

Comparison frequency

4

MHz

Equivalent phase noise at

-148

dBc/Hz

@10 kHz, SSB, with 2 MHz

phase detector

comparison from 4 MHz crystal

reference

RF division ratio

240

131071

Reference division ratio

see figure (7)

Output ports P0-P1#

7, 8

sink current

2

mA

Vport = 0.7V

leakage current

10

µA

Vport = Vcc

* Reference output disabled by connecting to Vcc if not required

’

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