80C451 View Datasheet(PDF) - Philips Electronics

Part Name

Description

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80C451

80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless, expanded I/O

Philips Electronics 

Philips Semiconductors

80C51 8-bit microcontroller family

4K/128 OTP/ROM/ROMless, expanded I/O

Product specification

80C451/83C451/87C451

VCC–0.5

0.45V

0.7VCC

0.2VCC–0.1

tCHCL

tCLCX

tCHCX

tCLCH

tCLCL

Figure 10. External Clock Drive

SU00009

VCC–0.5

0.2VCC+0.9

0.45V

0.2VCC–0.1

NOTE:

AC inputs during testing are driven at VCC –0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.

Timing measurements are made at VIH min for a logic ‘1’ and VIL max for a logic ‘0’.

Figure 11. AC Testing Input/Output

SU00010

VLOAD

VLOAD+0.1V

VLOAD–0.1V

TIMING

REFERENCE

POINTS

VOH–0.1V

VOL+0.1V

NOTE:

For timing purposes, a port is no longer floating when a 100mV change from load voltage occurs,

and begins to float when a 100mV change from the loaded VOH/VOL level occurs. IOH/IOL ≥ ±20mA.

SU00011

Figure 12. Float Waveform

30

MAX ACTIVE MODE

25

20

ICC mA 15

10

TYP ACTIVE MODE

5

MAX IDLE MODE

TYP IDLE MODE

4MHz 8MHz 12MHz 16MHz

FREQ AT XTAL1

VALID ONLY WITHIN FREQUENCY SPECIFICATIONS OF THE DEVICE UNDER TEST.

SU00092

Figure 13. ICC vs. FREQ

1998 May 01

16

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