MC9S08QB4 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MC9S08QB4

8-Bit HCS08 Central Processor Unit

Freescale Semiconductor 

Electrical Characteristics

Table 7. DC Characteristics (continued)

Num C

Characteristic

Symbol

Condition

Min Typical1 Max

Unit

Total

leakage

10

C

combined

for all inputs

All input only and I/O |IOZTOT| VIn = VDD or VSS

—

—

and Hi-Z

pins

2

μA

Pullup,

11 P Pulldown

resistors

all digital inputs except

PTA5/IRQ/TCLK/RESET,

when enabled

RPU,

RPD

—

17.5

—

52.5

kΩ

Pullup,

12 C Pulldown

resistors

PTA5/IRQ/TCLK/RESET, RPU,

when enabled2 RPD

—

17.5

—

52.5

kΩ

DC injection

Single pin limit

–0.2

—

13 D current 3, 4, Total MCU limit, includes IIC VIN < VSS, VIN > VDD

5

sum of all stressed pins

–5

—

0.2

mA

5

mA

14 C Input Capacitance, all pins

CIn

—

—

—

8

pF

15 C RAM retention voltage

16 C POR re-arm voltage6

VRAM

—

VPOR

—

—

0.6

1.0

V

0.9

1.4

2.0

V

17 D POR re-arm time

tPOR

—

10

—

—

μs

18 P Low-voltage detection threshold

VLVD

VDD falling

VDD rising

1.80

1.88

1.84

1.92

1.88

1.96

V

19 P Low-voltage warning threshold

VLVW

VDD falling

VDD rising

2.08

2.14

2.26

V

20

C

Low-voltage inhibit reset/recover

hysteresis

Vhys

—

—

80

—

mV

21 P Bandgap Voltage Reference7

VBG

—

1.15

1.17

1.18

V

1 Typical values are measured at 25 °C. Characterized, not tested

2 The specified resistor value is the actual value internal to the device. The pullup or pulldown value may appear lower when

measured externally on the pin.

3 All functional non-supply pins, except for PTA5 are internally clamped to VSS and VDD.

4 Input must be current limited to the value specified. To determine the value of the required current-limiting resistor, calculate

resistance values for positive and negative clamp voltages, then use the larger of the two values.

5 Power supply must maintain regulation within operating VDD range during instantaneous and operating maximum current

conditions. If the positive injection current (VIn > VDD) is greater than IDD, the injection current may flow out of VDD and could

result in external power supply going out of regulation. Ensure that external VDD load will shunt current greater than maximum

injection current. This will be the greatest risk when the MCU is not consuming power. Examples are: if no system clock is

present, or if clock rate is very low (which would reduce overall power consumption).

6 Maximum is highest voltage that POR is guaranteed.

7 Factory trimmed at VDD = 3.0 V, Temp = 25 °C

MC9S08QB8 Series MCU Data Sheet, Rev. 3

Freescale Semiconductor

11

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