Philips Semiconductors

Preliminary specification

SA9504

Dual-band, PCS(CDMA)/AMPS

LNA and downconverter mixers

1999 Oct 28

5

MODE SELECT LOGIC AND

DC CHARACTERISTICS

The SA9504 chip has several modes of operation for which the

selection logic is defined in the following table. Different mode

selections require different portions of the circuit to be active. Modes

from unlisted combinations of logic pins, are not valid.

POWER-UP PROCEDURE

In order for the SA9504 to function correctly as given in Table 1, the

circuit must be reset on power-up as follows:

To apply a reset, both S0 and S1 should be held HIGH

simultaneously (hold time 100 ns minimum), and then released to a

LOW state upon initially powering up the device.

Table 1.

Mode logic definition for LNA and Downconverter mixers

(Tx) LO

LOGIC INPUT PINS

MODES

(Tx) LO

BUFFER

(Tx) LO

BUFFER

OUTPUT

LO FREQ.

DOUBLER

POWER

S0 = S1

PCS/CEL

LO X2

ENABLE

(Tx) LO

ENABLE

PCS (CDMA)

1

PCS1

On

2 GHz

Off

0

1

0

1

2

PCS1 Idle

Off

—

Off

0

1

0

0

3

PCS2

On

2 GHz

On

0

1

1

1

4

PCS2 Idle

Off

—

On

0

1

1

0

Cellular FM

5

FM

On

1 GHz

Off

0

0

0

1

6

FM Idle

Off

—

Off

0

0

0

0

Power Down

7

x

x

Off

1

x

x

x

NOTES:

x = Don’t care

1. The device will be in the Power Down mode (sleep) when both control lines S0 and S1 are held HIGH simultaneously.

DC CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

LIMITS

UNIT

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

Power supply

Supply voltage

all modes

2.7

2.85

3.3

V

Supply current

PCS1 mode

32.5

37.4

mA

PCS1 Idle mode

21.9

25.2

mA

PCS2 mode

36.9

42.4

mA

PCS2 Idle mode

26.3

30.2

mA

FM mode

22.3

25.6

mA

FM Idle mode

11.8

13.8

mA

Supply current in power down

Sleep

1

50

µA

Logic inputs (LO_ENABLE, PCS/CEL, S0, S1, LO_X2_EN pins)

HIGH level input voltage range

At logic 1

V

LOW level input voltage range

At logic 0

–0.3

V

HIGH level input bias current

–5

0

5

µA

LOW level input bias current

pins at 0.4 V

–5

0

5

µA