TP83C251SQ16 데이터 시트보기 (PDF) - Intel

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TP83C251SQ16

HIGH-PERFORMANCE CHMOS MICROCONTROLLER

Intel 

8XC251SA/SB/SP/SQ HIGH-PERFORMANCE CHMOS MICROCONTROLLER

5.1 D.C. Characteristics

Parameter values apply to all devices unless otherwise indicated.

Symbol

Table 9. DC Characteristics at VCC = 4.5 – 5.5 V

Parameter

Min

Typical

Max

Units Test Conditions

VIL

Input Low Voltage

-0.5

(except EA#)

0.2VCC – 0.1

V

VIL1

Input Low Voltage

0

(EA#)

0.2VCC – 0.3

V

VIH

Input High Voltage

0.2VCC + 0.9

(except XTAL1, RST)

VCC + 0.5

V

VIH1

Input High Voltage

(XTAL1, RST)

0.7VCC

VCC + 0.5

V

VOL

Output Low Voltage

(Port 1, 2, 3)

0.3

0.45

1.0

V

IOL = 100 µA

IOL = 1.6 mA

IOL = 3.5 mA

(Note 1, Note 2)

VOL1

Output Low Voltage

(Port 0, ALE, PSEN#)

0.3

0.45

1.0

V

IOL = 200 µA

IOL = 3.2 mA

IOL = 7.0 mA

(Note 1, Note 2)

VOH

Output High Voltage

VCC – 0.3

(Port 1, 2, 3, ALE,

PSEN#)

VCC – 0.7

VCC – 1.5

V

IOH = -10 µA

IOH = -30 µA

IOH = -60 µA

(Note 3)

NOTES:

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

Maximum IOL per port pin: 10 mA

Maximum IOL per 8-bit port:

port 0

26 mA

ports 1–3

15 mA

Maximum Total IOL for

all output pins

71 mA

If IOL exceeds the test conditions, VOL may exceed the related specification. Pins are not guaranteed

to sink current greater than the listed test conditions.

2. Capacitive loading on ports 0 and 2 may cause spurious noise pulses above 0.4 V on the low-level

outputs of ALE and ports 1, 2, and 3. The noise is due to external bus capacitance discharging into

the port 0 and port 2 pins when these pins change from high to low. In applications where capacitive

loading exceeds 100 pF, the noise pulses on these signals may exceed 0.8 V. It may be desirable to

qualify ALE or other signals with a Schmitt trigger or CMOS-level input logic.

3. Capacitive loading on ports 0 and 2 causes the VOH on ALE and PSEN# to drop below the specifica-

tion when the address lines are stabilizing.

4. Typical values are obtained using VCC = 5.0, TA = 25°C and are not guaranteed.

16

PRELIMINARY

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