Philips Semiconductors Product data sheet
SC28L91
3.3 V or 5.0 V Universal Asynchronous
Receiver/Transmitter (UART)
2004 Oct 21 11
DC ELECTRICAL CHARACTERISTICS1, 2, 3
VCC = 3.3 V ± 10 %, Tamb = –40 °C to +85 °C, unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
VIL Input low voltage 0.65 0.2*VCC V
VIH Input high voltage 0.8*VCC 1.7 V
VOL Output low voltage IOL = 2.4 mA 0.2 0.4 V
VOH Output high voltage (except OD outputs)4IOH = –400 µAVCC – 0.5 VCC – 0.2 V
IIX1PD X1/CLK input current - power down VIN = 0 V to VCC –0.5 0.05 +0.5 µA
IILX1 X1/CLK input low current - operating VIN = 0 V –80 0µA
IIHX1 X1/CLK input high current - operating VIN = VCC 0 80 µA
Input leakage current:
IIAll except input port pins VIN = 0 V to VCC –0.5 0.05 +0.5 µA
Input port pins5VIN = 0 V to VCC –8 0.5 +0.5 µA
IOZH Output off current high, 3-State data bus VIN = VCC 0.5 µA
IOZL Output off current low, 3-State data bus VIN = 0 V –0.5 µA
IODL Open-drain output low current in off-state VIN = 0 V –0.5 µA
IODH Open-drain output high current in off-state VIN = VCC 0.5 µA
Power supply current6
ICC 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
5 ns maximum. For X1/CLK, this swing is between 0.4 V and 0.8*VCC. All time measurements are referenced at input voltages of 0.8 V and
2.0 V 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.
4. Test conditions for outputs: CL = 125 pF, except open drain outputs. Test conditions for open drain outputs: CL = 125 pF,
constant current source = 2.6 mA.
5. Input port pins have active pull-up transistors that will source a typical 2 µA from VCC when the input pins are at VSS.
Input port pins at VCC source 0.0 µA.
6. All outputs are disconnected. Inputs are switching between CMOS levels of VCC – 0.2 V and VSS + 0.2 V.