OM5234SLASHFBASLASHYYY datasheet(5/10 Pages) PHILIPS

5 / 10 page

Philips Semiconductors

Preliminary specification

OM5234/OM5284

CMOS single-chip 8-bit microcontrollers

1996 Nov 01

DC ELECTRICAL CHARACTERISTICS

VSS = 0V, VDD = 5V ± 10%, Tamb = 0°C to +70°C

TEST

LIMITS

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

VIL

Input low voltage, except EA, P1.6, P1.7

–0.5

0.2VDD–0.1

VIL1

Input low voltage to EA

–0.5

0.2VDD–0.3

VIL2

Input low voltage to P1.6, P1.7

–0.5

0.3VDD

VIH

Input high voltage, except XTAL1, RST, P1.6, P1.7

0.2VDD+0.9

VDD+0.5

VIH1

Input high voltage, XTAL1, RST

0.7VDD

VDD+0.5

VOL

Output low voltage, ports 1, 2, 3, except P1.6, P1.7

IOL = 1.6mA6, 7

0.45

VOL1

Output low voltage, port 0, ALE, PSEN

IOL = 3.2mA6, 7

0.45

VOL2

Output low voltage, P1.6, P1.7

IOL = 3.0mA

0.4

VOH

Output high voltage, ports 1, 2, 3, ALE, PSEN8

IOH = –25µA

0.75VDD

IIL

Logical 0 input current, ports 1, 2, 3, except P1.6, P1.7

VIN = 0.45V

–50

µA

ITL

Logical 1-to-0 transition current, ports 1, 2, 3, except P1.6, P1.7

See note 5

–650

µA

IL1

Input leakage current, port 0, EA, P1.6, P1.7

0.45V < VI < 4.7V

±10

µA

IDD

Power supply current:

Active mode @ 16MHz1, 9

VDD=5.5V

32.0

Idle mode @ 16MHz2, 9

Power down mode3, 4

µA

RRST

Internal reset pull-down resistor

225

Ω

CIO

Pin capacitance

NOTES:

1. The operating supply current is measured with all output pins disconnected; XTAL1 driven with tr = tf = 5ns;

VIL = VSS + 0.5V; VIH = VDD –0.5V; XTAL2 not connected; EA = RST = Port 0 = P1.6 = P1.7 = VDD.

2. The idle mode supply current is measured with all output pins disconnected; XTAL1 driven with tr = tf = 5ns; VIL = VSS + 0.5V;

VIH = VDD –0.5V; XTAL2 not connected; Port 0 = P1.6 = P1.7 = VDD; EA = RST = VSS.

3. The power-down current is measured with all output pins disconnected; XTAL2 not connected; Port 0 = P1.6 = P1.7 = VDD;

EA = RST = VSS.

4. 2V

≤ VPD ≤ VDDmax.

5. Pins of ports 1 , 2, and 3 source a transition current when they are being externally driven from 1 to 0. The transition current reaches its

maximum value when VIN is approximately 2V.

6. Capacitive loading on ports 0 and 2 may cause spurious noise to be superimposed on the VOLs of ALE and ports 1 and 3. The noise is due

to external bus capacitance discharging into the port 0 and port 2 pins when these pins make 1-to-0 transitions during bus operations. In the

worst cases (capacitive loading > 100pF), the noise pulse on the ALE pin may exceed 0.8V. In such cases, it may be desirable to qualify

ALE with a Schmitt Trigger, or use an address latch with a Schmitt Trigger STROBE input.

7. Under steady state (non-transient) conditions, IOL must be externally limited as follows: Maximum IOL = 10mA per port pin; Maximum

IOL = 26mA total for Port 0; Maximum IOL = 15mA total for Ports 1, 2, and 3; Maximum IOL = 71mA total for all output pins. If IOL exceeds the

test conditions, VOL may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test conditions.

8. Capacitive loading on ports 0 and 2 may cause the VOH on ALE and PSEN to momentarily fall below the 0.9VDD specification when the

address bits are stabilizing.

9. IDDMAX for other frequencies can be derived from Figure 1, where FREQ is the external oscillator frequency in MHz. IDDMAX is given in mA.

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