TI SN74BCT623N

SN54BCT623, SN74BCT623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS020A – SEPTEMBER 1988 – REVISED NOVEMBER 1993
•
•
SN54BCT623 . . . J OR W PACKAGE
SN74BCT623 . . . DW OR N PACKAGE
(TOP VIEW)
State-of-the-Art BiCMOS Design
Significantly Reduces ICCZ
ESD Protection Exceeds 2000 V
Per MIL-STD-883C, Method 3015
Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK) and Flatpacks (W), and
Plastic and Ceramic 300-mil DIPs (J, N)
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
description
The ′BCT623 bus transceiver is designed for
asynchronous communication between data
buses. The control function implementation allows
for maximum flexibility in timing. The ′BCT623
provides true data at its outputs.
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
OEBA
B1
B2
B3
B4
B5
B6
B7
B8
SN54BCT623 . . . FK PACKAGE
(TOP VIEW)
A2
A1
OEAB
VCC
This device allows data transmission from the A
bus to the B bus or from the B bus to the A bus
depending upon the logic levels at the
output-enable (OEAB and OEBA) inputs.
A3
A4
A5
A6
A7
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
B1
B2
B3
B4
B5
A8
GND
B8
B7
B6
The output-enable inputs can be used to disable
the device so that the buses are effectively
isolated. The dual-enable configuration gives the
transceivers the capability of storing data by
simultaneously enabling OEAB and OEBA. Each
output reinforces its input in this configuration.
When both OEAB and OEBA are enabled and all
other data sources to the two sets of bus lines are
at high impedance, both sets of bus lines (16 in all)
will remain at their last states.
OEBA
•
The SN54BCT623 is characterized for operation
over the full military temperature range of – 55°C
to 125°C. The SN74BCT623 is characterized for
operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OPERATION
OEBA
OEAB
L
L
B data to A bus
L
H
B data to A bus,
A data to B bus
H
L
Isolation
H
H
A data to B bus
Copyright  1993, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
2–1
SN54BCT623, SN74BCT623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS020A – SEPTEMBER 1988 – REVISED NOVEMBER 1993
logic symbol†
19
OEBA
OEAB
1
logic diagram (positive logic)
19
OEBA
EN1
EN2
1
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
2
1
3
18
1
1
2
17
4
16
5
15
6
14
7
13
8
12
9
11
B1
B2
2
A1
18
B1
B3
B4
B5
B6
B7
B8
To Seven Other Channels
† This symbol is in accordance with ANSI/IEEE Std 91-1984
and IEC Publication 617-12.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
Input voltage range: Control inputs (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 7 V
I/O ports (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
Voltage range applied to any output in the disabled or power-off state, VO . . . . . . . . . . . . . . . – 0.5 V to 5.5 V
Voltage range applied to any output in the high state, VO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 0.5 V to VCC
Input clamp current, IIK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mA
Current into any output in the low state: SN54BCT623 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96 mA
SN74BCT623 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128 mA
Operating free-air temperature range: SN54BCT623 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 55°C to 125°C
SN74BCT623 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C
Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 65°C to 150°C
‡ Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
recommended operating conditions
SN54BCT623
SN74BCT623
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.5
5
5.5
UNIT
VCC
VIH
Supply voltage
VIL
IIK
Low-level input voltage
0.8
0.8
V
Input clamp current
–18
–18
mA
IOH
High level output current
High-level
A port
–3
–3
B port
–12
–15
IOL
Low level output current
Low-level
A port
20
24
B port
48
64
TA
Operating free-air temperature
2–2
High-level input voltage
2
– 55
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
2
125
0
V
V
70
mA
mA
°C
SN54BCT623, SN74BCT623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS020A – SEPTEMBER 1988 – REVISED NOVEMBER 1993
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VCC = 4.5 V,
A port
VCC = 4
4.5
5V
B port
VCC = 4.5 V
VOH
A port
A or B port
II
IIH‡
IIL‡
IOS§
ICCL
ICCH
ICCZ
Ci
Cio
i
OEAB or OEBA
A or B port
OEAB or OEBA
A or B port
OEAB or OEBA
A port
B port
A to B
MIN
II = –18 mA
IOH = –1 mA
–1.2
IOH = – 3 mA
IOH = – 3 mA
IOH = –12 mA
IOH = –15 mA
2.4
3.3
2.4
3.3
2.4
3.3
2.4
3.3
2
3.2
2
3.1
VCC = 4
4.5
5V
IOL = 48 mA
IOL = 64 mA
0.38
0.55
5V
VCC = 5
5.5
V,
7V
VI = 2
2.7
VCC = 5
5.5
5V
V,
VI = 0
0.5
5V
VCC = 5
5.5
5V
V,
VO = 0
VCC = 5.5 V
VCC = 5.5 V
OEAB or OEBA
VCC = 5.5 V
VCC = 5 V,
VI = 2.5 V or 0.5 V
VCC = 5 V
V,
VO = 2.5
2 5 V or 0.5
05V
B to A
3.4
0.5
A to B
A to B
2.5
0.3
VI = 5
5.5
5V
–1.2
3.4
IOL = 20 mA
IOL = 24 mA
VCC = 5
5.5
5V
V,
SN74BCT623
TYP†
MAX
MIN
2.5
VCC = 4
4.5
5V
VOL
B port
SN54BCT623
TYP†
MAX
TEST CONDITIONS
UNIT
V
V
0.35
0.5
0.42
0.55
1
1
0.1
0.1
70
70
20
20
– 0.65
– 0.65
–0.6
–0.6
– 60
–150
– 60
–150
–100
– 225
–100
– 225
V
mA
µA
mA
mA
58
92
58
92
mA
33
53
33
53
mA
6
11
6
11
mA
5
5
9
9
12
12
pF
pF
† All typical values are at VCC = 5 V, TA = 25°C.
‡ For I/O ports, the parameters IIH and IIL include the off-state output current.
§ Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
2–3
SN54BCT623, SN74BCT623
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCBS020A – SEPTEMBER 1988 – REVISED NOVEMBER 1993
switching characteristics (see Note 2)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = 25°C
VCC = 4.5 V to 5.5 V,
CL = 50 pF,
R1 = 500 Ω,
R2 = 500 Ω,
TA = MIN to MAX†
′BCT623
tPLH
tPHL
A
B
tPLH
tPHL
B
A
tPZH
tPZL
OEBA
A
tPHZ
tPLZ
OEBA
A
tPZH
tPZL
OEAB
B
tPHZ
tPLZ
OEAB
B
SN54BCT623
SN74BCT623
MIN
TYP
MAX
MIN
MAX
MIN
MAX
0.5
3.1
4.7
0.5
5.3
0.5
5.2
1.7
4.9
6.9
1.7
7.6
1.7
7.4
0.9
4.1
5.9
0.9
6.8
0.9
6.7
1.8
5.3
7.6
1.8
8.3
1.8
8
3.1
6.8
9.1
3.1
10.7
3.1
10.6
3.3
7.2
9.6
3.3
11.3
3.3
10.7
1.9
6.1
8.3
1.9
10.6
1.9
9.8
1.1
4.6
7
1.1
8.1
1.1
7.8
2
5
6.8
2
7.8
2
7.6
2.7
6.2
8
2.7
9.3
2.7
8.9
1.1
4.6
6.5
1.1
8
1.1
7.7
0.3
3.2
6.3
0.3
7.2
0.3
7.1
† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 2: Load circuits and voltage waveforms are shown in Section 1.
2–4
POST OFFICE BOX 655303
UNIT
• DALLAS, TEXAS 75265
ns
ns
ns
ns
ns
ns
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