80C31BH Datasheet, PDF (9/16 Pages) Intel Corporation – CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER

AUTOMOTIVE 80C31BH 80C51BH 87C51
NOTES (Continued)
4 Pins of Ports 1 2 and 3 source a transition current when they are being externally driven from 1 to 0 The transition
current reaches its maximum value when V_IN is approximately 2V
5 ICCMAX at other frequencies is given by
Active Mode 87C51 ICCMAX e 0 94 c FREQ a 13 71
80Cx1BH ICCMAX e 1 47 c FREQ a 2 36
Idle Mode ICCMAX e 0 14 c FREQ a 3 81
where FREQ is the external oscillator frequency in MHz ICCMAX is given in mA See Figure 6
6 See Figures 7 through 10 for I_CC test conditions Minimum V_CC for Power Down is 2 0V
7 Under steady state (non-transient) conditions I_OL must be externally limited as follows
Maximum I_OL per port pin
10 mA
Maximum I_OL per 8-bit port
Port 0
26 mA
Ports 1 2 and 3
15 mA
Maximum total I_OL for all output pins
71 mA
If I_OL exceeds the test condition V_OL may exceed the related specification Pins are not guaranteed to sink current greater
than the listed test conditions
270419 – 7
Figure 6 I_CC vs FREQ Valid only
within frequency specifications of the
device under test
270419 – 10
Figure 8 I_CC Test Condition Idle Mode
All other pins are disconnected
270419 – 8
Figure 7 I_CC Test Condition Active Mode
All other pins are disconnected
270419 – 11
Figure 9 I_CC Test Condition Power Down
Mode All other pins are disconnected
270419 – 9
Figure 10 Clock Signal Waveform for I_CC tests in Active and Idle Modes
T_CLCH ^e T_CHCL ^e 5 ns
9