Philips Semiconductors

Preliminary specification

83C748/87C748

80C51 8-bit microcontroller family

2K/64 OTP/ROM, low pin count

1999 Apr 15

5

DC ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

TEST CONDITIONS

LIMITS

UNIT

SYMBOL

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Input low voltage

–0.5

V

Input high voltage, except X1, RST

V

Input high voltage, X1, RST

V

P0.2

Input low voltage

–0.5

V

Input high voltage

V

Output low voltage, ports 1 and 3

0.45

V

Output low voltage, port 0.2

0.45

V

Output high voltage, ports 1 and 3

2.4

V

V

V

Port 0.0 and 0.1 – Drivers

Output low voltage

0.4

V

Driver, receiver combined:

C

Capacitance

10

pF

Logical 0 input current, ports 1 and 3

–50

µA

–650

µA

Input leakage current, port 0

±10

µA

Internal pull-down resistor

25

175

k

Ω

Pin capacitance

Test freq = 1MHz,

10

pF

50

µA

12.5

13.0

V

Program current (for 87C748 only)

50

mA

Supply current (see Figure 2)

NOTES:

noted.

10mA

26mA

67mA

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