Philips Semiconductors

Product specification

SC28L91

3.3V–5.0V Universal Asynchronous

Receiver/Transmitter (UART)

2000 Sep 22

10

Symbol

Parameter

Rating

Unit

Note 4

°C

Storage temperature range

–65 to +150

°C

–0.5 to +7.0

V

V

Package power dissipation (PLCC44)

2.4

W

Package power dissipation (PQFP44)

1.78

W

Derating factor above 25

°C (PLCC44)

19

mW/

°C

Derating factor above 25

°C (PQFP44)

14

mW/

°C

NOTES:

1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and

functional operation of the device at these or any other condition above those indicated in the operation section of this specification is not

implied.

2. For operating at elevated temperatures, the device must be derated based on +150

°C maximum junction temperature.

3. This product includes circuitry specifically designed for the protection of its internal devices from damaging effects of excessive static

charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying any voltages larger than the rated maxima.

4. Parameters are valid over specified temperature and voltage range.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Input low voltage

0.8

V

Input high voltage (except X1/CLK)

2.4

1.5

V

Input high voltage (X1/CLK)

2.4

V

Output low voltage

0.2

0.4

V

V

X1/CLK input current - power down

0.5

0.05

0.5

µA

X1/CLK input low current - operating

–130

0

µA

X1/CLK input high current - operating

0

130

µA

Input leakage current:

All except input port pins

–0.5

0.05

+0.5

µA

–8

0.05

+0.5

µA

Output off current high, 3-State data bus

0.5

µA

Output off current low, 3-State data bus

–0.5

µA

Open-drain output low current in off-state

–0.5

µA

Open-drain output high current in off-state

0.5

µA

Operating mode

CMOS input levels

7

25

mA

Power down mode

CMOS input levels

≤1

5

mA

NOTES:

1. Parameters are valid over specified temperature and voltage range.

2. All voltage measurements are referenced to ground (GND). For testing, all inputs swing between 0.4 V and 3.0 V with a transition time of

2.0V and output voltages of 0.8 V and 2.0 V, as appropriate.

3. Typical values are at +25

°C, typical supply voltages, and typical processing parameters.

constant current source = 2.6 mA.

5. Input port pins have active pull-up transistors that will source a typical 2