V

Symbol

Parameter

Conditions

Value

Units

Min

Typ

Max

DIGITAL INTERFACE (CE, DATA, CLK, LE, LD)

V

IH

High-Level Input Voltage

0.8 V

DD

V

DD

V

0.8 V

CC

V

CC

V

V

IL

Low-Level Input Voltage

0

0.2 V

DD

V

0

0.2 V

CC

V

I

IH

High-Level Input Current

V

10

µA

I

IL

Low-Level Input Current

V

−10

µA

C

I

Input Capacitance

3.0

pF

V

OH

High-Level Output Voltage

0.9 V

DD

V

0.9 V

CC

V

V

OL

Low-Level Output Voltage

0.1 V

DD

V

0.1 V

CC

V

C

O

Output Capacitance

5.0

pF

MICROWIRE INTERFACE

t

CS

DATA to CLK Set Up Time

50.0

ns

t

CH

DATA to CLK Hold Time

10.0

ns

t

CWH

CLK Pulse Width HIGH

50.0

ns

t

CWL

CLK Pulse Width LOW

50.0

ns

t

ES

CLK to LE Set Up Time

50.0

ns

t

EW

LE Pulse Width

50.0

ns

Note 4: For other RF frequency ranges, please contact National Semiconductor Corporation.

Note 5: When the Cellular-CDMA mode is used, an external /2 circuit is required before the Cellular mixer LO port. Furthermore, if an external /1.5 circuit is available

before the GPS mixer LO port, the GPS frequency of 1391.82 MHz can be achieved by using a fixed RF frequency of 2087.73 MHz.

Note 6: Lock time is defined as the time difference between the beginning of the frequency transition and the point at which the frequency remains within +/- 1 kHz

Note 7: For frequencies other than the default values, the SPI_DEF bit should be set to 0 and registers R4 and R5 programmed appropriately. Refer to Section

2.2.5 for further details on how to program the SPI_DEF bit.

Note 8: For other reference oscillator frequencies, please contact National Semiconductor Corporation.

www.national.com

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