11

Specification

Absolute Maximum Ratings

Exceeding the maximum rating can result in device damage. Operation of the device outside the operating limits is

not implied.

Supply voltage

-0.3 to 7.0V

Input voltage at any pin (ref V

SS

= 0V)

-0.3 to (V

DD

+ 0.3V)

Sink/source current (supply pins)

+/- 30mA

(other pins)

+/- 20mA

Total device dissipation @ T

AMB

25°C

800mW Max.

Derating

10mW/°C

Operating temperature range:

FX489DW/P

-40°C to +85°C

Storage temperature range:

FX489DW/P

-40°C to +85°C

Operating Limits

All device characteristics are measured under the following conditions unless otherwise specified:

V

DD

= 5.0V, T

AMB

= 25°C. Xtal/Clock Frequency = 4.096MHz. Data Rate = 8000 bits/sec.

Noise Bandwidth = Bit Rate

Characteristics

See Note

Min.

Typ.

Max.

Unit

Static Values

Supply Voltage (V

4.5

5.0

5.5

V

Supply Current

Tx PS Rx PS

1

1

1

-

1.0

-

mA

0

1

-

3.0

-

mA

1

0

-

4.0

-

mA

0

0

-

7.0

-

mA

Input Logic Levels

Logic “1”

3.5

-

-

V

Logic “0”

-

-

1.5

V

Logic Input Current

2

-5.0

-

5.0

µA

Logic “1”Output Level at IOH = -120µA

4.6

-

-

V

Logic “0”Output Level at IOL = 120µA

-

-

0.4

V

Rx, Tx Data Rate

4000

19200

bits/sec

Transmit Parameters

Tx OUT, Output Impedance

3

-

1.0

-

k

Ω

Tx OUT, Level

4

0.8

1.0

1.2

V p-p

Tx Data Delay (BT = 0.3)

5

-

2.0

2.5

bit-periods

(BT = 0.5)

5

-

1.5

2.0

bit-periods

Tx PS to Output-Stable Time

6

-

4.0

-

bit-periods

Receive Parameters

Rx Amplifier -

Input Impedance

1.0

-

-

M

Ω

Output Impedance

7

-

10.0

-

k

Ω

Voltage Gain

-

50.0

-

dB

Rx Filter Signal Input Level

8

0.7

1.0

1.3

V p-p

Rx Time Delay

9

-

-

3.0

bit-periods

On-Chip Xtal Oscillator

R

IN

10.0

-

-

M

Ω

R

OUT

5.0

-

15.0

k

Ω

Voltage Gain

-

15.0

-

dB

Xtal/Clock Frequency

1.0

–

5.0

MHz

“High” Pulse Width

10

80.0

-

-

ns

“Low” Pulse Width

10

80.0

-

-

ns

Notes

1. Not including current drawn from the FX489 pins by external circuitry. See Absolute Maximum Ratings.

2. For V

3

For a load of 10k

Ω or greater. Tx PS input at logic “0”; Tx Enable = “1”.

4. Data pattern of “1111000011110000 ..”

5. Measured between the rising edge of ‘Tx Clock’ and the centre of the corresponding bit at ‘Tx Out.’

6. Time between the falling edge of ‘Tx PS’ and the ‘Tx Out’ voltage stabilising to normal output levels.

7. For a load of 10k

Ω or greater. Rx PS input at logic “0”.

8. For optimum performance, measured at the ‘Rx Feedback’ pin for a “1111000011110000 ...” pattern.

9. Measured between the centre of bit at ‘Rx Signal In’ and corresponding rising edge of the ‘Rx Clock’.

10. Timing for an external clock input to the Xtal/Clock pin.