
Electrical Specifications
MC68HC908GR8A MC68HC908GR4A Data Sheet, Rev. 5
234
Freescale Semiconductor
19.6 3.0 V DC Electrical Characteristics
POR reset voltage(8)
VPORRST
0
700
800
mV
POR rise time ramp rate(9)
RPOR
0.035
—
V/ms
1. VDD = 5.0 Vdc ± 10%, VSS = 0 Vdc, TA = TL to TH, unless otherwise noted
2. Typical values reflect average measurements at midpoint of voltage range, 25
°C only.
3. Run (operating) IDD measured using external square wave clock source (fosc = 32.8 MHz). All inputs 0.2 V from rail. No dc
loads. Less than 100 pF on all outputs. CL = 20 pF on OSC2. All ports configured as inputs. OSC2 capacitance linearly
affects run IDD. Measured with all modules enabled.
4. Wait IDD measured using external square wave clock source (fosc = 32.8 MHz). All inputs 0.2 V from rail. No dc loads. Less
than 100 pF on all outputs. CL = 20 pF on OSC2. All ports configured as inputs. OSC2 capacitance linearly affects wait
IDD. Measured with PLL and LVI enabled.
5. Stop IDD is measured with OSC1 = VSS.
6. Stop IDD with TBM enabled is measured using an external crystal clock source (fOSC = 8 MHz). All inputs 0.2 V from rail.
No dc loads. Less than 100 pF on all outputs. All inputs configured as inputs.
8. Maximum is highest voltage that POR is possible.
9. If minimum VDD is not reached before the internal POR reset is released, RST must be driven low externally until minimum
VDD is reached.
Characteristic(1)
Symbol
Min
Typ(2)
Max
Unit
Output high voltage
(ILoad = –0.6 mA) all I/O pins
(ILoad = –4.0 mA) all I/O pins
(ILoad = –4.0 mA) pins PTC0–PTC1 only
Maximum combined IOH for port C, port E,
port PTD0–PTD3
Maximum combined IOH for port PTD4–PTD6,
port A, port B
Maximum total IOH for all port pins
VOH
IOH1
IOH2
IOHT
VDD – 0.3
VDD – 1.0
VDD – 0.5
—
30
60
V
mA
Output low voltage
(ILoad = 0.5 mA) all I/O pins
(ILoad = 6.0 mA) all I/O pins
(ILoad = 10.0 mA) pins PTC0–PTC1 only
Maximum combined IOL for port C, port E,
port PTD0–PTD3
Maximum combined IOL for port PTD4–PTD6,
port A, port B
Maximum total IOL for all port pins
VOL
IOL1
IOL2
IOLT
—
0.3
1.0
0.8
30
60
V
mA
Input high voltage
All ports, IRQs, RESET
OSC1
VIH
0.7 x VDD
0.8 x VDD
—VDD
V
Input low voltage
All ports, IRQs, RESET
OSC1
VIL
VSS
—
0.3 x VDD
0.2 x VDD
V
Continued on next page
Characteristic(1)
Symbol
Min
Typ(2)
Max
Unit