SCLS149C – DECEMBER 1982 – REVISED DECEMBER 2002
D Wide Operating Voltage Range of 2 V to 6 V
D High-Current 3-State Outputs Can Drive Up
To 15 LSTTL Loads
Low Power Consumption, 80-µA Max ICC
Typical tpd = 8 ns
±6-mA Output Drive at 5 V
Low Input Current of 1 µA Max
Lock Bus-Latch Capability
True Logic
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
description/ordering information
These octal bus transceivers are designed for
asynchronous two-way communication between
data buses. The control-function implementation
allows for maximum flexibility in timing.
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
A2
A1
OEAB
VCC
SN54HC623 . . . FK PACKAGE
(TOP VIEW)
The ’HC623 devices allow 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
OEAB and OEBA disable the device so that the
buses are effectively isolated. The dual-enable
configuration gives the transceivers the capability
to store data by simultaneously enabling OEAB
and OEBA. Each output reinforces its input in this
transceiver configuration. When both OEAB and
OEBA are enabled and all other data sources to
the two sets of bus lines are in the high-impedance
state, both sets of bus lines (16 total) remain at
their last states. The 8-bit codes appearing on the
two sets of buses are identical.
OEBA
D
D
D
D
D
D
SN54HC623 . . . J OR W PACKAGE
SN74HC623 . . . DW, N, OR NS PACKAGE
(TOP VIEW)
ORDERING INFORMATION
PDIP – N
–40°C
40°C to 85°C
–55°C to 125°C
ORDERABLE
PART NUMBER
PACKAGE†
TA
TOP-SIDE
MARKING
Tube
SN74HC623N
Tube
SN74HC623DW
Tape and reel
SN74HC623DWR
SOP – NS
Tape and reel
SN74HC623NSR
HC623
CDIP – J
Tube
SNJ54HC623J
SNJ54HC623J
CFP – W
Tube
SNJ54HC623W
SNJ54HC623W
LCCC – FK
Tube
SNJ54HC623FK
SOIC – DW
SN74HC623N
HC623
SNJ54HC623FK
† Package drawings, standard packing quantities, thermal data, symbolization, and PCB design
guidelines are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2002, Texas Instruments Incorporated
!"#$% ! %&%
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1
SCLS149C – DECEMBER 1982 – REVISED DECEMBER 2002
FUNCTION TABLE
INPUTS
OEBA
OEAB
OPERATION
L
L
B data to A bus
H
H
A data to B bus
H
L
Isolation
H
B data to A bus,
A data to B bus
L
logic diagram (positive logic)
OEBA
OEAB
A1
19
1
2
18
B1
To Seven Other Transceivers
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±20 mA
Continuous output current, IO (VO = 0 to VCC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±35 mA
Continuous current through VCC or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±70 mA
Package thermal impedance, θJA (see Note 2): DW package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58°C/W
N package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69°C/W
NS package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60°C/W
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The package thermal impedance is calculated in accordance with JESD 51-7.
2
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SCLS149C – DECEMBER 1982 – REVISED DECEMBER 2002
recommended operating conditions (see Note 3)
SN54HC623
VCC
VIH
Supply voltage
VCC = 2 V
VCC = 4.5 V
High-level
High
level in
input
ut voltage
VCC = 6 V
VCC = 2 V
VIL
VI
VO
∆t/∆v
MIN
NOM
MAX
2
5
6
Input voltage
MAX
2
5
6
3.15
3.15
4.2
4.2
0
VCC = 6 V
UNIT
V
V
0.5
0.5
1.35
1.35
1.8
1.8
VCC
VCC
VCC = 2 V
VCC = 4.5 V
Input
In
ut transition rise/fall time
NOM
1.5
0
Output voltage
MIN
1.5
VCC = 4.5 V
VCC = 6 V
Low-level
Low
level in
input
ut voltage
SN74HC623
0
VCC
VCC
0
1000
1000
500
500
400
400
V
V
V
ns
TA
Operating free-air temperature
–55
125
–40
85
°C
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VOH
TEST CONDITIONS
IOZ
ICC
Ci
A or B
MAX
MIN
MAX
UNIT
1.998
1.9
1.9
IOH = –20
20 µA
4.4
4.499
4.4
4.4
6V
5.9
5.999
5.9
5.9
IOH = –6 mA
IOH = –7.8 mA
4.5 V
3.98
4.3
3.7
3.84
6V
5.48
5.8
5.2
5.34
2V
0.002
0.1
0.1
0.1
IOL = 20 µA
4.5 V
0.001
0.1
0.1
0.1
6V
0.001
0.1
0.1
0.1
4.5 V
0.17
0.26
0.4
0.33
6V
0.15
0.26
0.4
0.33
6V
±0.1
±100
±1000
±1000
nA
6V
±0.01
±0.5
±10
±5
µA
8
160
80
µA
10
10
10
pF
VI = VCC or 0
VO = VCC or 0
VI = VCC or 0,
MIN
SN74HC623
1.9
VI = VIH or VIL
OEAB or
OEBA
SN54HC623
2V
IOL = 6 mA
IOL = 7.8 mA
II
TA = 25°C
MIN
TYP
MAX
4.5 V
VI = VIH or VIL
VOL
VCC
IO = 0
OEAB or
OEBA
6V
2 V to 6 V
3
V
V
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3
SCLS149C – DECEMBER 1982 – REVISED DECEMBER 2002
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
TA = 25°C
TYP
MAX
SN54HC623
SN74HC623
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
2V
29
105
160
130
tpd
d
A or B
B or A
4.5 V
10
21
32
26
6V
8
18
27
22
ten
OEBA
tdis
ten
A
OEBA
A
OEAB
tdis
B
OEAB
B
tt
A or B
MIN
MIN
MAX
MIN
MAX
2V
112
210
315
265
4.5 V
27
42
63
53
6V
20
36
54
45
2V
40
150
225
190
4.5 V
18
30
45
38
6V
16
26
38
32
2V
112
210
315
265
4.5 V
27
42
63
53
6V
20
36
54
45
2V
40
150
225
190
4.5 V
18
30
45
38
6V
16
26
38
32
2V
20
60
90
75
4.5 V
8
12
18
15
6V
6
10
15
13
UNIT
ns
ns
ns
ns
ns
ns
switching characteristics over recommended operating free-air temperature range, CL = 150 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
tpd
d
FROM
(INPUT)
TO
(OUTPUT)
A or B
B or A
OEBA
A
ten
OEAB
B
tt
A or B
VCC
MIN
TA = 25°C
TYP
MAX
SN54HC623
MIN
MAX
SN74HC623
MIN
MAX
2V
44
135
200
170
4.5 V
14
27
40
34
6V
11
23
34
29
2V
130
270
405
335
4.5 V
31
54
81
67
6V
23
46
69
56
2V
130
270
405
335
4.5 V
31
54
81
67
6V
23
46
69
56
2V
45
210
315
265
4.5 V
17
42
63
53
6V
13
36
53
45
UNIT
ns
ns
ns
ns
operating characteristics, TA = 25°C
PARAMETER
Cpd
TEST CONDITIONS
Power dissipation capacitance per transceiver
No load
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4
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TYP
40
UNIT
pF
SCLS149C – DECEMBER 1982 – REVISED DECEMBER 2002
PARAMETER MEASUREMENT INFORMATION
VCC
From Output
Under Test
CL
(see Note A)
Test
Point
PARAMETER
S1
ten
RL
tdis
S2
tPZH
RL
1 kΩ
tPZL
tPHZ
tPLZ
1 kΩ
tpd or tt
––
LOAD CIRCUIT
Input
90%
50%
10%
CL
S1
S2
50 pF
or
150 pF
Open
Closed
Closed
Open
Open
Closed
Closed
Open
Open
Open
50 pF
50 pF
or
150 pF
VCC
50%
10% 0 V
90%
tr
tf
VOLTAGE WAVEFORM
INPUT RISE AND FALL TIMES
VCC
Input
50%
50%
0V
tPLH
In-Phase
Output
50%
10%
tPHL
90%
90%
tr
tPHL
Out-ofPhase
Output
90%
tf
50%
10%
VCC
50%
50%
0V
tPZL
VOH
50%
10% V
OL
tf
tPLH
50%
10%
Output
Control
(Low-Level
Enabling)
90%
VOH
VOL
Output
Waveform 1
(See Note B)
tPLZ
10%
tPZH
Output
Waveform 2
(See Note B)
≈VCC
≈VCC
50%
VOL
tPHZ
50%
90%
VOH
≈0 V
tr
VOLTAGE WAVEFORMS
PROPAGATION DELAY AND OUTPUT TRANSITION TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES FOR 3-STATE OUTPUTS
NOTES: A. CL includes probe and test-fixture capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. Phase relationships between waveforms were chosen arbitrarily. All input pulses are supplied by generators having the following
characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 6 ns, tf = 6 ns.
D. The outputs are measured one at a time with one input transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
Figure 1. Load Circuit and Voltage Waveforms
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5
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
SN74HC623DW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC623
SN74HC623N
ACTIVE
PDIP
N
20
20
RoHS &
Non-Green
NIPDAU
N / A for Pkg Type
-40 to 85
SN74HC623N
SN74HC623NSR
ACTIVE
SO
NS
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
HC623
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of