83C749 datasheet(13/22 Pages) PHILIPS

13 / 22 page

Philips Semiconductors

Preliminary specification

83C749/87C749

80C51 8-bit microcontroller family

2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count

1998 Apr 23

DC ELECTRICAL CHARACTERISTICS (Continued)

Tamb = 0°C to +70°C, AVCC = 5V ±5, AVSS = 0V4

VCC = 5V ± 10%, VSS = 0V

TEST

LIMITS4

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP1

MAX

UNIT

Analog Inputs (A/D guaranteed only with quartz window covered.) (Continued)

Resolution

bits

ERA

Relative accuracy

±1

LSB

OSe

Zero scale offset

±1

LSB

Full scale gain error

0.4

MCTC

Channel to channel matching

±1

LSB

Crosstalk

0–100kHz

–60

NOTES:

1. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and

functional operation of the device at these or any conditions other than those described in the AC and DC Electrical Characteristics section

of this specification is not implied.

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. This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive static

charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated maxima.

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

noted.

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

6. 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.

7. 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.

8. Load capacitance for ports = 80pF.

9. The resistor ladder network is not disconnected in the power down or idle modes. Thus, to conserve power, the user may remove AVCC.

10. If the A/D function is not required, or if the A/D function is only needed periodically, AVCC may be removed without affecting the operation of

the digital circuitry. Contents of ADCON and ADAT are not guaranteed to be valid. If AVCC is removed, the A/D inputs must be lowered to

less than 0.5V. Digital inputs on P1.0–P1.4 will not function normally.

11. These parameters do not apply to P1.0–P1.4 if the A/D function is enabled.

AC ELECTRICAL CHARACTERISTICS

Tamb = 0°C to +70°C or –40°C to +85°C, VCC = 5V ±10%, VSS = 0V4, 8

16MHz CLOCK

VARIABLE CLOCK

SYMBOL

PARAMETER

MIN

MAX

MIN

MAX

UNIT

1/tCLCL

Oscillator frequency:

3.5

MHz

External Clock (Figure 4)

tCHCX

High time

tCLCX

Low time

tCLCH

Rise time

tCHCL

Fall time

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