83C751 datasheet(7/24 Pages) PHILIPS

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Philips Semiconductors

Product specification

83C751/87C751

80C51 8-bit microcontroller family

2K/64 OTP/ROM, I2C, low pin count

1998 May 01

NOTES TO DC ELECTRICAL CHARACTERISTICS:

1. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise

noted.

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

Maximum IOL per port pin:

10mA

(NOTE: This is 85

°C spec.)

Maximum IOL per 8-bit port:

26mA

Maximum total IOL 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.

3. Pins of ports 1 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.

4. Power-down ICC is measured with all output pins disconnected; port 0 = VCC; X2, X1 n.c.; RST = VSS.

5. Active ICC is measured with all output pins disconnected; X1 driven with tCLCH, tCHCL = 5ns, VIL = VSS + 0.5V, VIH = VCC – 0.5V; X2 n.c.;

RST = port 0 = VCC. ICC will be slightly higher if a crystal oscillator is used.

6. Idle ICC is measured with all output pins disconnected; X1 driven with tCLCH, tCHCL = 5ns, VIL = VSS + 0.5V, VIH = VCC – 0.5V; X2 n.c.;

port 0 = VCC; RST = VSS.

AC ELECTRICAL CHARACTERISTICS

Tamb = 0°C to +70°C or –40°C to +85°C, VCC = 5V ±10% for 87C751, VCC = 5V ±10% for 83C751, VSS = 0V1, 2

12MHz CLOCK

VARIABLE CLOCK

SYMBOL

PARAMETER

MIN

MAX

MIN

MAX

UNIT

1/tCLCL

Oscillator frequency:

3.5

MHz

3.5

MHz

External Clock (Figure 1)

tCHCX

High time

tCLCX

Low time

tCLCH

Rise time

tCHCL

Fall time

NOTES:

1. Parameters are valid over operating temperature range unless otherwise specified. All voltages are with respect to VSS unless otherwise

noted.

2. Load capacitance for ports = 80pF.

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