MC908QT4MPE datasheet(151/184 Pages) FREESCALE

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5-V DC Electrical Characteristics

MC68HC908QY/QT Family Data Sheet, Rev. 5

Freescale Semiconductor

151

16.5 5-V DC Electrical Characteristics

Characteristic(1)

1. VDD = 4.5 to 5.5 Vdc, VSS = 0 Vdc, TA = TL to TH, unless otherwise noted.

Symbol

Min

Typ(2)

2. Typical values reflect average measurements at midpoint of voltage range, 25°C only.

Max

Unit

Output high voltage

ILoad = –2.0 mA, all I/O pins

ILoad = –10.0 mA, all I/O pins

ILoad = –15.0 mA, PTA0, PTA1, PTA3–PTA5 only

VOH

VDD–0.4

VDD–1.5

VDD–0.8

—

Maximum combined IOH (all I/O pins)

IOHT

——

Output low voltage

ILoad = 1.6 mA, all I/O pins

ILoad = 10.0 mA, all I/O pins

ILoad = 15.0 mA, PTA0, PTA1, PTA3–PTA5 only

VOL

—

0.4

1.5

0.8

Maximum combined IOL (all I/O pins)

IOLT

——

Input high voltage

PTA0–PTA5, PTB0–PTB7

VIH

0.7 x VDD

—

VDD

Input low voltage

PTA0–PTA5, PTB0–PTB7

VIL

VSS

—

0.3 x VDD

Input hysteresis

VHYS

0.06 x VDD

——

DC injection current, all ports

IINJ

–2

—

Total dc current injection (sum of all I/O)

IINJTOT

–25

—

+25

Ports Hi-Z leakage current

IIL

–1

±0.1

µA

Capacitance

Ports (as input)

CIN

COUT

—

POR rearm voltage(3)

3. Maximum is highest voltage that POR is guaranteed.

VPOR

0—

100

POR rise time ramp rate(4)

4. If minimum VDD is not reached before the internal POR reset is released, the LVI will hold the part in reset until minimum

VDD is reached.

RPOR

0.035

—

V/ms

Monitor mode entry voltage

VTST

VDD + 2.5

—9.1

Pullup resistors(5)

PTA0–PTA5, PTB0–PTB7

5. RPU is measured at VDD = 5.0 V.

RPU

Ω

Low-voltage inhibit reset, trip falling voltage

VTRIPF

3.90

4.20

4.50

Low-voltage inhibit reset, trip rising voltage

VTRIPR

4.00

4.30

4.60

Low-voltage inhibit reset/recover hysteresis

VHYS

—

100

—

MC908QT4MPE Datasheet(PDF) 151 Page - Freescale Semiconductor, Inc

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