BUS TRANSCEIVER. UPB8287 Datasheet

UPB8287 TRANSCEIVER. Datasheet pdf. Equivalent


NEC UPB8287
NEe Microcomputers, Inc.
NEe
JLPB8286
u.PBS-287
8-BIT BUS TRANSCEIVER
DESCRIPTION
The 8286 and 8287 are octal bus transceivers used for buffering microprocessor
bus lines. Being bi-directional, they are ideal for buffering the data bus lines on
8 or 16 bit microprocessors. Each B output is capable of driving 32 mA low or 5 mA
high.
F EATU RES
Data Bus Buffer Driver for IlCOM·8 (8080, 8085A, 780) and IlCOM-16 (8086)
families
• Low Input Load Current --- 0.2 mA max.
• High Output Drive Capability for Driving System Data Bus
• Tri·State Outputs
• 20 Pin Package with Fully Parallel 8·Bit Transceivers
PIN CONFIGURATIONS
AO
A1
A2
A3
A4
A5
A6
A7
DE
GND
vee AO
BO A1
B1 A2
B2 A3
B3 A4
B4 A5
B5 A6
B6 A7
B7 DE
T GND
PIN NAMES
AO·A7
Local Bus Data
BO-B7
System Bus Data
OE Output Enable
T Transmit
vee
BO
B1
B2
B3
B4
Bs
B6
B7
T
681


UPB8287 Datasheet
Recommendation UPB8287 Datasheet
Part UPB8287
Description 8-BIT BUS TRANSCEIVER
Feature UPB8287; NEe Microcomputers, Inc. NEe JLPB8286 u.PBS-287 8-BIT BUS TRANSCEIVER DESCRIPTION The 8286 and 8.
Manufacture NEC
Datasheet
Download UPB8287 Datasheet




NEC UPB8287
}LPB8286/8287
r - - -82-86- - - l
~I
I
I
I
I
I
r - - -82-87- - - l
@--I
I
I
II
I
BLOCK DIAGRAMS
OE T
00
01
10
11
RESULT
B-A
A .... B
Aand B
} HIGH
IMPEDANCE
Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . oOe to 700 e
Storage Temperature ................................ -65°e to +150o e
All Output and Supply Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . -O.5V to +7V
All Input Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -1.0V to +5.5V
Power Dissipation ........................................... 1 W
COMMENT: Stress above those listed under "Absolute Maximum Ratings" may cause permanent
damage to the device. This is a stress rating only and functional operation of the device at these or
any other conditions above those indicated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device
reliabilitY.
ABSOLUTE MAXIMUM
RATINGS*
'Ta = 2SoC
682



NEC UPB8287
jJ. PB828618287
DC CHARACTE R ISTICS
Ta ~ oOe to 70"e, Vee ~ 5V ± 5%
PARAMETER
SYMBOL
Input Clamp Voltage
.11_-Power Supply Current
8287
8286
Forward Input Current
Ve
leC
lee
IF
Reverse Input Current
IR
- B Outputs
Output Low Voltage - A Outputs
VOL
Output High Voltage - B Outputs
- A Outputs
VOH
Output Off Current
Output Off Current
Input Low Voltage
!- A Side
I B Side
IOFF
IOFF
VIL
VIL
Input High Voltage
iInput Capacitance
- A Side
- B Side
VIH
elN
MIN MAX UNITS
-1 V
130 rnA
160 rnA
-0.2 rnA
50 ~A
0.5 V
0.5 V
2,4 V
2,4 V
IF
IR
- ~0.9
V
V
2.0 V
16
pF
22
CDNote, B Outputs - IOL = 32 rnA, IOH = -5 rnA, eL = 300 pF
A Outputs - IOL =- 10 rnA, IOH = -1 rnA, CL = 100 pF
TEST CONDITIONS
Ie = -5 rnA
VF ~ 0,45V
VR = 5.25V
IOL = 32 rnA
IOL = 10 rnA
IOH = -5 rnA
IOH =-1 rnA
VOFF = 0,45V
VOFF = 5.25V
Vee = 5.0V
Vee = 5.0V
Vee = 5.0V
CD
CD
CD
F = 1 MHz
VBIAS = 2.5V, Vee = 5V
Ta =25°C
CAPACITANCE
Ta 1 MHz
PARAMETER
Input Capacitance
Output Capacitance
SYMBOL
CI
Co
LIMITS
MIN TYP MAX
58
8 12
UNIT
pF
pF
TEST
CONDITIONS
VI = OV
Vo = OV
AC CHARACTE RISTICS Ta = O°C to 70°C, VCC = 5V ± 5%
SYMBOL
TIVOV
TEHTV
TTVEL
TEHOZ
TELOV
PARAMETER
Input to Output Delay
Inverting
Non-Inverting
Transmit/Receive Hold Time
Transmit/Receive Setup
Output Disable Time
Output Enable Time
MIN
TEHOZ
30
10
MAX
25
35
25
50
Notes: See waveforms and test load circuit,
B Outputs - IOL =32 mA, IOH =-5 mA, CL =300 pF
A Outputs - IOL =10 mA, IOH =-1 mA, CL = 100 pF
UNITS
ns
ns
ns
ns
ns
ns
683







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