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PT2579 V1.6

- 8 -

May, 2008

RDS Demodulator IC

PT2579

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Digital Demodulator and Outputs – QUAL, RDDA, T57, OSC2, RDCL

High level output

voltage

4.4

-

-

V

Low level output

voltage

-

-

0.4

V

Nominal clock

frequency

RDCL

-

1187.5

-

Hz

RDCL jitter

-

-

-

18

µs

Nominal subcarrier

frequency

fT57

T57

(see Note 1)

-

57.0

-

KHz

OSC2

1.5

-

-

mA

OSC2

-1.6

-

-

mA

QUAL, RDDA, T57, RDCL

5.9

-

-

mA

Output current

QUAL, RDDA, T57, RDCL

-5.3

-

-

mA

4.332 MHz Crystal Parameter

Crystal frequency

f0

-

-

4.332

-

MHz

Maximum permitted

tolerance



fmax

-

±50

-

Ta=25℃

-

-

±20

f0 adjustment

tolerance

f0

Ta=-40 to +85℃

-

-

±25

Load capacitance

CL

-

30

-

pF

Resonance

resistance

Rxtal

-

-

60

Ω

8.664 MHz Crystal

Crystal frequency

f0

-

-

8.664

-

MHz

Maximum permitted

tolerance

fmax

-

±50

-

Ta=25℃

-

-

±30

f0 adjustment

tolerance

f0

Ta=-40 to +85 ℃

-

-

±30

Load capacitance

CL

-

30

-

pF

Resonance

resistance

Rxtal

-

-

60

Ω

Note:

The signal T57 has a phase lead of 123° (±180°) relative to ARI carrier at output SCOUT.