TSC87251G1A
Notes:
1. Under steady–state (non–transient) conditions, I must be externally limited as follows:
OL
Maximum I per port pin: . . . . . . . . . . . . . . . . . . . . . . . 10 mA
OL
Maximum I per 8–bit port:
Port 0 . . . . . . . 26 mA
Ports 1-3 . . . . . 15 mA
Output Pins . . . 71 mA
OL
Maximum Total I for all:
OL
If I exceeds the test conditions, V may exceed the related specification. Pins are not guaranteed to sink current greater than the listed test
OL
OL
conditions.
2. Capacitive loading on Ports 0 and 2 may cause spurious noise pulses above 0.4 V on the low–level outputs 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 high to low. In applications where
capacitive loading exceeds 100 pF, the noise pulses on these signals may exceed 0.8 V. It may be desirable to qualify ALE or other signals with a
Schmitt Trigger or CMOS–level input logic.
3. Capacitive loading on Ports 0 and 2 causes the V on ALE and PSEN# to drop below the specification when the address lines are stabilizing.
OH
4. Typical values are obtained using V = 5 V and T = 25°C with no guarantee.
DD
A
They are not tested and there is not guarantee on these values.
2
5. The input threshold voltage of SCL and SDA meets the I C specification, so an input voltage below 0.3.V will be recognized as a logic 0 while an
DD
input voltage above 0.7.V will be recognized as a logic 1.
DD
80
60
40
20
0
2
4
6
8
10
12
14
16
(1)
Frequency at XTAL (MHz)
max Active mode (mA)
typ Active mode (mA)
max Idle mode (mA)
typ Idle mode (mA)
Note:
1. The clock prescaler is not used: F
= F
.
OSC
XTAL
Figure 10. I /I versus Frequency; V = 4.5 to 5.5 V
DD DL
DD
34
Rev. A – September 21, 1998
TEMIC [ TEMIC SEMICONDUCTORS ]
