Intel MCS48 User Manual page 285

8216/8226
WAVEFORMS
A.C.
CHARACTERISTICS
T
A
= 0°C
to
+70°C,
V
CC
=
+oV ±5%
Parameter
Limits
Unit
Symbol
Min.
Typ.m
Max.
Conditions
Tpdi
Input to
Output
Delay
DO
Outputs 15 25
ns
C
L
=30pF,R
1
=300n
R
2
=600fi
Tp
D2
Input to Output Delay
DB
Outputs
8216
19
30
ns
C
L
=300pF,
R!=90n
8226
16
25
ns
R
2
= 180J2
T
E
Output Enable Time
8216
42
65
ns
(Note
2)
8226
36
54
ns (Note 3)
T
D
Output
Disable
Time
16
35
ns (Note
4)
Test Conditions:
Input pulse amplitude of 2.5V.
Input
rise
and
fall
times of
5
ns
between
1
and 2
volts.
Output
loading
is
5
mA
and 10 pF.
Speed measurements
are
made
at 1.5 volt
levels.
Test
Load
Circuit
CAPACITANCES
Parameter
Limits
Symbol
Min.
Typ.m
Max. Unit
C
IN
Input Capacitance
4
8 PF
C
OUT1
Output
Capacitance
6
W
pF
CquT2
Output
Capacitance
13 18
pF
Test Conditions
V
BIAS = 2.5V,
V
cc
= 5.0V,
T A
=
25°C,
f
=
1
MHz.
NOTES:
1.
Typical values
are for
T
A
- 25°C, Vqq = 5.0V.
2.
DO
Outpuw,
C
L
»
30pF, Rj
- 300/10
Kn, R
2
- 180/IKfi;
DB
Outputs,
C
L
= 300pF, R, =
90/10
Kn, R
2
=
180/1
Kn.
3.
DO
Outputs,
C
L
=
30pF, R, -
300/10
Kn, R
2
=
600/1
K;
DB
Outputs,
C
L
=300pF, R,
=
90/10
Kn, R
2
=
180/IKfi.
4.
DO
Outputs, Cl = 5pF, Rj =
300/10
Kn, R
2
=
600/1
Kn, DB
Outputs,
C
L
= 5pF,
Rt
=
90/10
Kn, R
2
=
180/1
Kn.
5.
This parameter
is
periodically sampled and not
100%
tested.
7-47