Intel 8286/8287 Datasheet

M8286/M8287
OCTAL BUS TRANSCEIVER
Military
• Data Bus Buffer Drive for Miiitary
M8086, M8088, M80186, M8085A,
and M8048AH Processors
• 3-State Outputs
• No Output Low Noise When Entering
or Leaving High Impedance State
• High Output Drive Capability for
Driving System Data Bus
• Mllltary Temperature Range:
-ss·c to + 12s·c <Tc>
• Fully Parallel 8-Blt Transceivers
The M8286 and M8287 are 8-bit bipolar transceivers with 3-state outputs. The M8287 inverts the input data at
its outputs while the M8286 does not. Thus, a wide variety of applications for buffering in microcomputer
systems can be met.
M8286
M8287
Vee
Ao
Vee
Bo
,.,
IO
81
A2
Ii
82
A3
12
83
A4
Ii
84
A5
14
85
,..
15
••
A7
Ii
87
GI
17
T
T
GNO
271025-3
271025-2
271025-1
Figure 1.
INDEX
CORNEA
NC
A1
271025-4
Logic
...
Diagrams
NC •cc
..
INDEX
CORNEA
.,
I
NC
A1
...
NC •cc
'
I
,.. ,
..
.,
'
'"
' '
, .. ,
��
NC
NC
�=�
A2
[)�
12
A2
,_2�
AJ
[)!
13
.,
[)!
••
...
�}�
..
...
�=�
••
...
�)!
..
...
:)�
••
� :2! ii
...
�:a!
..
r--
A7
r--
NC
A7
L�!.
NC
L
:11: :1·:
:1•:
NC
Of
GND NC
T
NC
271025-5
Figure 2. Pin Configurations
NC
GNO NC
T
.,
l�!.
NC
..
NC
NC
271025-6
M8288/M8287
Table 1. Pin Description
Type
Symbol
Name end Function
T
I
TRANSMIT: T is an input control signal used to control the direction of the
transceivers. When H IGH , it configures the transceiver's 80-87 as outputs
with Ao-A7 as Inputs. T LOW configures Ao-A7 as the outputs with 80-87
serving as the inputs.
OE
I
OUTPUT ENABLE: OE is an input control signal used to enable the
appropriate output driver (as selected by T) onto its respective bus. This
signal is active LOW.
Ao-A7
i/O
LOCAL BUS DATA PINS: These pins serve to either present data to or
accept data from the processor's local bus depending upon the state of the T
pin.
�-!!z (M8286)
110
SYSTEM BUS DATA PINS: These pins serve to either present data to or
accept data from the system bus depending upon the state of the T pin.
80-87 (M8287)
FUNCTIONAL DESCRIPTION
The M8286 and M8287 transceivers are 8-bit trans
ceivers with high impedance outputs. With T active
HIGH and OE active LOW, data at the Ao-A7 pins
is driven onto the 80-87 pins. With T inactive LOW
and OE active LOW data at the 80-87 pins is driven
onto the Ao - A 7 pins. No output low glitching will oc
cur whenever the tranceivers are entering or leaving
the high impedance state.
ABSOLUTE MAXIMUM RATINGS*
Case Temperature Under 8ias(2). - 55°C to +125°C
•Notice: Stresses above those ls
i ted under ''.4bso
lute Maximum Ratings" may cause permanent dam
Storage Temperature .......... - 6 5°C to + 1 50 ° C
age to the device. This is a stress ratn
i g only and
All Output and Supply Voltages ..... - 0.5V to + 7V
functional operation of the device at these or any
All Input Voltages ................ -1.0V to + 5.5V
Power Dissipation ..........................1.0W
other conditions above those indicated in the opera
tional sections of this specification is not implied. Ex
posure to absolute maximum rating conditions for
extended periods may affect device reliability.
D.C. CHARACTERISTICS
Symbol
°
Vee= sv ±5%.Tc(2l= -55°C to +125C
Panimeter
Ve
Input Clamp Voltage
Ice
PowerSupply Current
Min
Mu
Unlta
-1
v
M828 7
130
mA
M8286
160
mA
T..t Conditions
le= -5mA
IF
Forward Input Current
-0.2
mA
VF= 0.45V
IA
Reverse Input Current
50
µ.A
VA= 5.25V
Vol
Output L ow Voltage
B Outputs
0.45
v
IOL= 20mA
Outputs
0.45
v
loL
v
IOH = -5mA
A
VoH
Output High Voltage
loFF
loFF
Output Off Current
Output Off Current
V1L
Input Low Voltage
V1H
Input High Voltage
C1N
Input Capacitance
B Outputs
2.4
A Outputs
2.4
v
=
10mA
loH = -1 mA
VQFF= 0.45V
VQFF= 5.25V
IF
IA
ASide
0.8
v
Vee= 5.0V (Note 1)
BSide
0.9
v
Vee= 5.0V (Note 1)
v
Vee= 5.0V (Note 1)
2.0
OE andTonly
12
pF
F = 1 MHz
All Other Inputs
25
pF
Ve1AS= 2.5V, Vee= 5V
Tc(2l = 25•c
NOTE:
1. B outputs-loL = 20 mA, loH = - 5 mA, CL
A oulputs-loL = 10 mA, loH = -1 mA, CL
2. Case temperatures are "instant on".
=
=
300 pF
100 pF
M8286/M8287
A.C. CHARACTERISTICS
Vee= sv ±5%, Tc(2l = - ss•cto +125°C
Loading: B Outputs--loL = 20 mA, loH = - 5 mA, CL = 300 pF
A Outputs-loL = 1 0 mA, loH = -1 mA, CL = 1 00 pF
Symbol
TIVOV
Min
Parameter
Max
Units
Test Conditions
25
35
ns
(Note 1)
Input to Output Delay
Inverting
Non-Inverting
TEHTV
Transmit/Receive Hold Time
TTVEL
Transmit/Receive Setup
TEHOZ
Output Disable Time
TELOV
Output Enable Time
TOLOH
TOHOL
ns
TEHOZ
ns
30
ns
25
ns
50
ns
Output Rise Time
20
ns
From O.BV to 2.0V
Output Fall Time
12
ns
From 2 .0 V to O.BV
10
NOTES:
1. See waveforms and test load circuit on following pages.
2. Case temperatures are "instant on."
A.C. TESTING INPUT, OUTPUT WAVEFORM
TEST LOAD CIRCUITS
Input/Output
l.ttV
...
1,5 ....,__ TEST POINTS
�
1.S
0.45
271025-7
MIDMTAft
271025-8
A.C. Testing: Inputs Are Driven at 2.4V for a Logic "'1"' and 0.45V
for a Logic "'O."' Timing Measurements Are Made at 1.5V for Both
a Logic "'1"' and "O." Input Rise and Fall nmes Are Measured
from o.ev to 2.0V and are Driven at 5 ns ± 2 ns.
A Output
17-124
271025
BOutput
intef
M8286/M8287
WAVEFORM
INl'UTI
TIYOV
f---+--· VoH
TEHOZ
--
- .w
TElO
V
-----
OUTPUTS
---l--""
'-
VOL+ .1V
c
Y0tt
V
OL
-1
TT
V El
___
NOTE:
1. All timing measurements are made at 1.SV unless otherwise noted.
50
-
-7
40
u
z
>
271025-10
50
40
"'
..
-- ------
=
30
z
>
30
�
"'
�
"'
0
0
20
20
10
10
200
400
eoo
eoo
1000
200
400
eoo
eoo
1000
pf LOAD
pf LOAD
271025-11
271025-12
Output Delay vs. Capacitance
17-125

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