10-8
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
MOTOROLA
10.7 DC ELECTRICAL CHARACTERISTICS
(V
CC
=5.0 VDC
±
5%; GND=0 VDC; T
A
=T
L
TO T
H
) (Applies To All Processors Except The MC68EC000)
Characteristic
Symbol
Min
Max
Unit
Input High Voltage
VIH
VIL
IIN
2.0
VCC
0.8
V
Input Low Voltage
GND-0.3
V
Input Leakage Current
@ 5.25 V
BERR
,
BGACK
,
BR
,
DTACK
, CLK,
IPL0—IPL2
,
VPA
MODE,
HALT, RESET
—
—
2.5
20
μ
A
Three-State (Off State) Input Current
@ 2.4 V/0.4 V
AS
, A0—A23, D0—D15,
FC0–FC2,
LDS
, R/
W
,
UDS, VMA
ITSI
—
20
μ
A
Output High Voltage
E,
AS
, A0–A23,
BG
, D0–D15,
FC0–FC2,
LDS
, R/
W
,
UDS, VMA
VOH
VCC –0.75
—
V
Output Low Voltage
(IOL = 1.6 mA)
(IOL = 3.2 mA)
(IOL = 5.0 mA)
(IOL = 5.3 mA)
Current Dissipation*
HALT
A0—A23,
BG
, FC0-FC2
RESET
E,
AS
, D0—D15,
LDS
, R/
W, UDS, VMA
VOL
—
—
—
—
0.5
0.5
0.5
0.5
V
f = 8 MHz
f = 10 MHz
f = 12.5 MHz
f = 16.67 MHz
f = 20 MHz
ID
—
—
—
—
—
25
30
35
50
70
mA
Power Dissipation
f = 8 MHz
f = 10 MHz
f = 12.5 MHz
f = 16.67 MHz
f = 20 MHz
PD
—
0.13
0.16
0.19
0.26
0.38
W
Capacitance (Vin = 0 V, TA=25
°
C, Frequency=1 MHz)**
Load Capacitance
Cin
CL
—
20.0
pF
HALT
All Others
—
—
70
130
pF
* Current listed are with no loading.
** Capacitance is periodically sampled rather than 100% tested.
10.8 AC ELECTRICAL SPECIFICATIONS — CLOCK TIMING
(
See Figure 10-3)
(Applies To All Processors Except The MC68EC000)
Num
Characteristic
8 MHz*
10 MHz*
12.5 MHz*
16.67 MHz
12F
16 MHz
20 MHZ
**
Unit
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Frequency of Operation
4.0
8.0
4.0
10.0
4.0
12.5
8.0
16.7
8.0
16.7
8.0
20.0
MHz
1
Cycle Time
125
250
100
250
80
250
60
125
60
125
50
125
ns
2,3
Clock Pulse Width
(Measured from 1.5 V to 1.5
V for 12F)
55
55
125
125
45
45
125
125
35
35
125
125
27
27
62.5
62.5
27
27
62.5
62.5
21
21
62.5
62.5
ns
4,5
Clock Rise and Fall Times
—
—
10
10
—
—
10
10
—
—
5
5
—
—
5
5
—
—
5
5
—
—
4
4
ns
*These specifications represent an improvement over previously published specifications for the 8-, 10-, and 12.5-
MHz MC68000 and are valid only for product bearing date codes of 8827 and later.
**This frequency applies only to MC68HC000 and MC68EC000 parts.