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SCAS059A − D2957, JULY 1987 − REVISED APRIL 1993
74ACT11623
OCTAL BUS TRANSCEIVER
WITH 3 STATE OUTPUTS
•
•
•
•
•
•
•
Local Bus-Latch Capability
Inputs Are TTL-Voltage Compatible
Flow-Through Architecture Optimizes
PCB Layout
Center-Pin V
CC
and GND Configurations
Minimize High-Speed Switching Noise
EPICt
(Enhanced-Performance Implanted
CMOS) 1-mm Process
500-mA Typical Latch-Up Immunity
at 125°C
Package Options Include Plastic Small-
Outline Packages and Standard Plastic
300-mil DIPs
DW OR NT PACKAGE
(TOP VIEW)
A1
A2
A3
A4
GND
GND
GND
GND
A5
A6
A7
A8
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
GAB
B1
B2
B3
B4
V
CC
V
CC
B5
B6
B7
B8
GBA
description
The 74ACT11623 is designed for asynchronous two-way communication between data buses. The control
function implementation allows for maximum flexibility in timing.
The 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 enable inputs (GBA and GAB). The enable inputs can be used to disable the device so
that the buses are effectively isolated.
The dual-enable configuration gives these devices the capability to store data by simultaneous enabling of GBA
and GAB. Each output reinforces its input in this transceiver configuration. Thus, when both control inputs 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. The 8-bit codes appearing on the two sets of buses will be identical for the
74ACT11623.
The 74ACT11623 is characterized for operation from − 40°C to 85°C.
FUNCTION TABLE
ENABLE INPUTS
GBA
GAB
L
L
H
H
H
L
L
H
OPERATION
B data to A bus
A data to B bus
Isolation
B data to A bus,
A data to B bus
EPIC is a trademark of 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.
Copyright
1993, Texas Instruments Incorporated
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
2−1
SCAS059A − D2957, JULY 1987 − REVISED APRIL 1993
74ACT11623
OCTAL BUS TRANSCEIVER
WITH 3 STATE OUTPUTS
logic symbol
†
GBA
GAB
A1
13
24
1
EN1
EN2
1
2
23
B1
logic diagram (positive logic)
GBA
GAB
A2
2
22
B2
A1
B1
A3
3
21
B3
A4
4
20
B4
A2
B2
A5
9
17
B5
A6
10
16
B6
To Six Other Transceivers
A7
11
15
B7
A8
12
14
B8
† 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, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to 7 V
Input voltage range, V
I
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V
CC
+ 0.5 V
Output voltage range, V
O
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −0.5 V to V
CC
+ 0.5 V
Input clamp current, I
IK
(V
I
< 0 or V
I
> V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
20 mA
Output clamp current, I
OK
(V
O
< 0 or V
O
> V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
50 mA
Continuous output current, I
O
(V
O
= 0 to V
CC
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
50 mA
Continuous current through V
CC
or GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
200 mA
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.
2−2
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
SCAS059A − D2957, JULY 1987 − REVISED APRIL 1993
74ACT11623
OCTAL BUS TRANSCEIVER
WITH 3 STATE OUTPUTS
recommended operating conditions
MIN
VCC
VIH
VIL
VI
VO
IOH
IOL
Dt
/Dv
TA
Supply voltage
High-level input voltage
Low-level input voltage
Input voltage
Output voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature
0
− 40
0
0
4.5
2
0.8
VCC
VCC
−24
24
10
85
MAX
5.5
UNIT
V
V
V
V
V
mA
mA
ns/ V
°C
electrical characteristics over recommended operating free-air temperature range
PARAMETER
IOH = − 50
mA
A
VOH
IOH = − 24 mA
IOH = − 75 mA†
IOL = 50
mA
A
VOL
IOL = 24 mA
IOL = 75 mA†
VO = VCC or GND
VI = VCC or GND
VI = VCC or GND, IO = 0
One input at 3.4 V, Other inputs at GND or VCC
GBA or GAB
VI = VCC or GND
VO = VCC or GND
TEST CONDITIONS
VCC
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5.5 V
5V
4
±
0.5
±
0.1
4
0.9
0.1
0.1
0.36
0.36
TA = 25°C
MIN
TYP
MAX
4.4
5.4
3.94
4.94
MIN
4.4
5.4
3.8
4.8
3.85
0.1
0.1
0.44
0.44
1.65
±
5
±
1
40
1
mA
mA
µA
mA
pF
pF
V
V
MAX
UNIT
IOZ
II
ICC
DI
CC§
Ci
A or B ports‡
GBA or GAB
Cio
A or B ports
5V
20
† Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
‡ For I/O ports, the parameter IOZ includes the input leakage.
§ This is the increase in supply current for each input that is at one of the specified TTL voltage levels rather than 0 V or VCC.
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
2−3
SCAS059A − D2957, JULY 1987 − REVISED APRIL 1993
74ACT11623
OCTAL BUS TRANSCEIVER
WITH 3 STATE OUTPUTS
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
FROM
(INPUT)
A or B
GBA
GBA
GAB
GAB
TO
(OUTPUT)
B or A
A
A
B
B
TA = 25°C
MIN
TYP
MAX
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
6
5.5
6.9
6.9
8.1
8.5
7.7
7.7
7.1
7.3
7.5
7.2
8.6
9
10
10.5
9.3
9.7
8.8
9.2
MIN
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
1.5
MAX
8.5
7.9
9.7
10
10.9
11.5
10.7
10.9
9.5
10
ns
ns
ns
ns
ns
UNIT
operating characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER
Outputs enabled
Cpd
Power dissipation capacitance per transceiver
Outputs disabled
CL = 50 pF,
f = 1 MHz
TEST CONDITIONS
TYP
41
8
pF
UNIT
2−4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
Microchip MCU
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