Philips Semiconductors

Product specification

SC28L91

3.3V–5.0V Universal Asynchronous

Receiver/Transmitter (UART)

2000 Sep 22

11

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Input low voltage

0.65

V

Input high voltage

1.7

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

–80

0

µA

X1/CLK input high current - operating

0

80

µA

Input leakage current:

All except input port pins

–0.5

0.05

+0.5

µA

–8

0.5

+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

5

mA

Power down mode

CMOS input levels

≤1

5.0

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