Datasheet > 87C54

87C54

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
英特尔 - INTEL		微控制器
页数	文件大小	规格书
23页	313K
描述
CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

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87C54 数据手册

8XC52/54/58

Test Conditions

DC CHARACTERISTICS (Over Operating Conditions) (Continued)

All parameter values apply to all devices unless otherwise indicated.

Typ

Symbol

Parameter

Min

Max

Unit

(Note 4)

e b

OH1

Output High Voltage

(Port 0 in External Bus Mode)

0.3

0.7

1.5

200 mA

3.2 mA

7.0 mA

Logical 0 Input Current

(Ports 1, 2 and 3)

0.45V

V or V

Input leakage Current (Port 0)

Logical 1 to 0 Transition Current

(Ports 1, 2 and 3)

Commercial

650

750

Express

RRST

CIO

RST Pulldown Resistor

Pin Capacitance

225

1 MHz, 25 C

Power Supply Current:

Active Mode

(Note 3)

at 12 MHz (Figure 5)

at 16 MHz

at 24 MHz

at 33 MHz (8XC5X-33)

Idle Mode

at 12 MHz (Figure 5)

at 16 MHz

at 24 MHz

7.5

9.5

13.5

at 33 MHz (8XC5X-33)

Power Down Mode

8XC5X-33

NOTES:

1. Capacitive loading on Ports 0 and 2 may cause noise pulses above 0.4V to be superimposed on the V s 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 1 to 0. In applications where capacitive loading exceeds 100 pF, the noise pulses on these signals may exceed

0.8V. It may be desirable to qualify ALE or other signals with a Schmitt Triggers, or CMOS-level input logic.

2. Capacitive loading on Ports 0 and 2 cause the V

address lines are stabilizing.

3. See Figures 6–9 for test conditions. Minimum V

on ALE and PSEN to drop below the 0.9 V specification when the

for Power Down is 2V.

4. Typicals are based on a limited number of samples and are not guaranteed. The values listed are at room temperature

and 5V.

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

Maximum I per port pin:

Maximum I per 8-bit portÐ

10mA

Port 0:

Ports 1, 2 and 3:

Maximum total I for all output pins:

26 mA

15 mA

71 mA

If I exceeds the test condition, V may exceed the related specification. Pins are not guaranteed to sink current greater

OL OL

than the listed test conditions.

1...6 7 8910 11 12...23

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