83C749 datasheet(14/22 Pages) PHILIPS

Part #	83C749

Description	80C51 8-bit microcontroller family 2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count

PDF	22 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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14 / 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

EXPLANATION OF THE AC SYMBOLS

Each timing symbol has five characters. The first character is always

‘t’ (= time). The other characters, depending on their positions,

indicate the name of a signal or the logical status of that signal.

The designations are:

C – Clock

D – Input data

H – Logic level high

L – Logic level low

Q – Output data

T – Time

V – Valid

X – No longer a valid logic level

Z – Float

tCHCL

tCLCL

tCLCH

tCHCX

VCC –0.5

0.45V

0.2 VCC + 0.9

0.2 VCC – 0.1

tCLCX

SU00297

Figure 4. External Clock Drive

0.2 VCC + 0.9

0.2 VCC – 0.1

VCC –0.5

0.45V

SU00307

Figure 5. AC Testing Input/Output

4MHz

8MHz

12MHz

16MHz

FREQ

MAX ACTIVE ICC

TYP ACTIVE ICC

MAX IDLE ICC

TYP IDLE ICC

ICC mA

SU00308

Figure 6. ICC vs. FREQ

Maximum ICC values taken at VCC = 5.5V and worst case temperature.

Typical ICC values taken at VCC = 5.0V and 25°C.

Notes 6 and 7 refer to AC Electrical Characteristics.

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