SC87C51APF40 datasheet(11/30 Pages) PHILIPS

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Philips Semiconductors

Product specification

80C31/80C51/87C51

CMOS single-chip 8-bit microcontrollers

1996 Aug 16

DC ELECTRICAL CHARACTERISTICS

Tamb = 0°C to +70°C or –40°C to +85°C, VCC = 5V ±20%, VSS = 0V (PCB80C31/51 and PCF80C31/51) (12, 16, and 24MHz versions)

Tamb = 0°C to +70°C or –40°C to +85°C, VCC = 5V ±10%, VSS = 0V (87C51 12, 16, and 24MHz versions) (PCB80C31/51 33MHz version);

For SC87C51 (33MHz only) Tamb = 0°C to +70°C, VCC = 5V ±5%

TEST

LIMITS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYPICAL1

MAX

UNIT

VIL

Input low voltage, except EA7

–0.5

0.2VCC–0.1

VIL1

Input low voltage to EA7

0.2VCC–0.3

VIH

Input high voltage, except XTAL1, RST7

0.2VCC+0.9

VCC+0.5

VIH1

Input high voltage, XTAL1, RST7

0.7VCC

VCC+0.5

VOL

Output low voltage, ports 1, 2, 311

IOL = 1.6mA2

0.45

VOL1

Output low voltage, port 0, ALE, PSEN11

IOL = 3.2mA2

0.45

VOH

Output high voltage, ports 1, 2, 3, ALE, PSEN3

IOH = –60µA,

IOH = –25µA

IOH = –10µA

2.4

0.75VCC

0.9VCC

VOH1

Output high voltage (port 0 in external bus mode)

IOH = –800µA,

IOH = –300µA

IOH = –80µA

2.4

0.75VCC

0.9VCC

IIL

Logical 0 input current, ports 1, 2, 37

VIN = 0.45V

–50

µA

ITL

Logical 1-to-0 transition current, ports 1, 2, 37

See note 4

–650

µA

ILI

Input leakage current, port 0

VIN = VIL or VIH

±10

µA

ICC

Power supply current:7

Active mode @ 12MHz8 (Philips)

Active mode @ 12MHz5 (Philips North America)

Idle mode @ 12MHz9 (Philips)

Idle mode @ 12MHz (Philips North America)

Power-down mode10 (Philips and

Philips North America)

See note 6

11.5

1.3

4.4

µA

RRST

Internal reset pull-down resistor

(Philips North America)

300

Ω

(Philips)

150

Ω

CIO

Pin capacitance12

NOTES:

1. Typical ratings are not guaranteed. The values listed are at room temperature, 5V.

2. 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. IOL can exceed these conditions provided that no

single output sinks more than 5mA and no more than two outputs exceed the test conditions.

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

address bits are stabilizing.

4. 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.

5. ICCMAX at other frequencies (for Philips North America parts) is given by: Active mode: ICCMAX = 1.43 X FREQ + 1.90;

Idle mode: ICCMAX = 0.14 X FREQ +2.31, where FREQ is the external oscillator frequency in MHz. ICCMAX is given in mA. See Figure 8.

6. See Figures 9 through 12 for ICC test conditions.

7. For Philips North America parts when Tamb = –40°C to +85°C or Philips parts when Tamb = –40°C to +125°C, see DC Electrical

Characteristics table on previous page.

8. The operating supply current is measured with all output pins disconnected; XTAL1 driven with tr = tf = 10ns; VIL = VSS + 0.5V;

VIH = VCC – 0.5V; XTAL2 not connected; EA = RST = Port 0 = VCC.

9. The idle mode supply current is measured with all output pins disconnected; XTAL1 driven with tr = tf = 10ns; VIL = VSS + 0.5V;

VIH = VCC – 0.5V; XTAL2 not connected; EA = Port 0 = VCC; RST = VSS.

10. The power-down current is measured with all output pins disconnected, XTAL2 not connected, EA = Port 0 = VCC; RST = VSS.

11. Under steady state (non-transient) conditions, IOL must be externally limited as follows:

Maximum IOL per port pin:

15mA

Maximum IOL per 8-bit port:

26mA

Maximum IOL total for all outputs:

67mA

If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater than the listed

test conditions.

12. Pin capacitance for the ceramic DIP package is 15pF maximum.

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