MC74AC652, MC74ACT652
Octal Transceiver/Register
with 3−State Outputs
(Non−Inverting)
The MC74AC/ACT652 consists of registered bus transceiver
circuits, with outputs, D−type flip−flops and control circuitry
providing multiplexed transmission of data directly from the input bus
or from the internal storage registers. Data on the A or B bus will be
loaded into the respective registers on the LOW−to−HIGH transition
of the appropriate clock pin (CAB or CBA). The four fundamental
data handling functions available are illustrated in Figures 1 to 4.
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PDIP−24
N SUFFIX
CASE 724
24
1
24
1
SO−24
DW SUFFIX
CASE 751E
•
•
•
•
•
•
•
w
Independent Registers for A and B Buses
Multiplexed Real−Time and Stored Data Transfers
Choice of True and Inverting Data Paths
3−State Outputs
300 mil Slim Dual−in−Line Package
Outputs Source/Sink 24 mA
′ACT652
Has TTL Compatible Inputs
These devices are available in Pb−free package(s). Specifications herein
apply to both standard and Pb−free devices. Please see our website at
www.onsemi.com for specific Pb−free orderable part numbers, or
contact your local ON Semiconductor sales office or representative.
REAL TIME TRANSFER
A-BUS TO B-BUS
A-BUS
REG
B-BUS
REG
REG
B-BUS
REAL TIME TRANSFER
B-BUS TO A-BUS
A-BUS
REG
MARKING DIAGRAMS
PDIP−24
MC74AC652N
AWLYYWW
MC74ACT652N
AWLYYWW
SO−24
AC652
AWLYYWW
Figure 1.
STORAGE
FROM BUS TO REGISTER
A-BUS
REG
B-BUS
REG
REG
Figure 2.
TRANSFER
FROM REGISTER TO BUS
A-BUS
REG
B-BUS
Device
MC74AC652N
MC74ACT652N
MC74AC652DW
MC74AC652DWR
2
MC74ACT652DW
ACT652
AWLYYWW
A
Location
L, WL
Y, YY
W, WW
= Assembly
= Wafer Lot
= Year
= Work Week
ORDERING INFORMATION
Package
PDIP−24
PDIP−24
SOIC−24
Shipping
15 Units/Rail
15 Units/Rail
30 Units/Rail
Figure 3.
Figure 4.
SOIC−24 1000 Tape & Reel
SOIC−24
30 Units/Rail
MC74ACT652DWR2
SOIC−24 1000 Tape & Reel
©
Semiconductor Components Industries, LLC, 2006
March, 2006
−
Rev. 6
1
Publication Order Number:
MC74AC652/D
MC74AC652, MC74ACT652
V
CC
24
CBA
23
SBA
22
GBA
21
B
0
20
B
1
19
B
2
18
B
3
17
B
4
16
B
5
15
B
6
14
B
7
13
PIN ASSIGNMENT
PIN
A
0
−A
7
B
0
−B
7
CAB, CBA
SAB, SBA
GAB, GBA
FUNCTION
Data Register A Inputs
Data Register A Outputs
Data Register B Inputs
Data Register B Outputs
Clock Pulse Inputs
Transmit/Receive Inputs
Output Enable Inputs
1
CAB
2
SAB
3
GAB
4
A
0
5
A
1
6
A
2
7
A
3
8
A
4
9
A
5
10
A
6
11
A
7
12
GND
Figure 5. Pinout: 24−Lead Plastic Package
(Top View)
CAB
SAB
GAB
CBA
SBA
GBA
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
Figure 6. Logic Symbol
GBA
CBA
SBA
CAB
SAB
1 OF 8 CHANNELS
GAB
D
0
C
0
B
0
A
0
D
0
C
0
TO 7 OTHER CHANNELS
NOTE:
This diagram is provided only for the understanding of
logic operations and should not be used to estimate
propagation delays.
Figure 7. Logic Diagram
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2
MC74AC652, MC74ACT652
FUNCTION TABLE
Inputs
GAB
GBA
CAB
CBA
SAB
SBA
Data I/O*
A
0
−
A
7
B
0
−
B
7
Operation or Function
L
L
X
H
L
L
L
L
H
H
H
H
H
H
H
X
L
L
L
H
H
L
H or L
⇑
⇑
⇑
H or L
⇑
X
X
X
H or L
H or L
H or L
⇑
H or L
⇑
⇑
⇑
X
H or L
X
X
H or L
X
X
X
X**
X
X
X
X
L
H
H
X
X
X
X
X
X**
L
H
X
X
H
Input
Input
Input
Unspecified*
Output
Output
Input
Output
Input
Isolation
Store A and B Data
Unspecified* Store A, Hold B
Output
Store A in Both Registers
Input
Input
Input
Output
Output
Hold A, Store B
Store B in Both Registers
Real-Time B Data to A Bus
Stored B Data to A Bus
Real-Time A Data to B Bus
Stored A Data to B Bus
Stored A Data to B Bus and
Stored B Data to A Bus
*The data output functions may be enabled or disabled by various signals at the GBA and GAB inputs. Data input functions are always enabled;
i.e., data at the bus pins will be stored on every LOW-to-HIGH transition of the appropriate clock inputs.
**Select control = L: clocks can occur simultaneously.
H = HIGH Voltage Level; L = LOW Voltage Level; X = Immaterial;
⇑
= LOW-to-HIGH Transition
MAXIMUM RATINGS*
Symbol
V
CC
V
in
V
out
I
in
I
out
I
CC
T
stg
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Sink/Source Current, per Pin
DC V
CC
or GND Current per Output Pin
Storage Temperature
Value
−0.5
to +7.0
−0.5
to V
CC
+ 0.5
−0.5
to V
CC
+ 0.5
±
20
±
50
±
50
−65
to +150
Unit
V
V
V
mA
mA
mA
°C
*Maximum Ratings are those values beyond which damage to the device may occur. Functional operation should be restricted to the Recom-
mended Operating Conditions.
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
in
, V
out
t
r
, t
f
Supply Voltage
DC Input Voltage, Output Voltage (Ref. to GND)
Input Rise and Fall Time (Note 1)
′AC
Devices except Schmitt Inputs
Input Rise and Fall Time (Note 2)
′ACT
Devices except Schmitt Inputs
Junction Temperature (PDIP)
Operating Ambient Temperature Range
Output Current — HIGH
Output Current — LOW
V
CC
@ 3.0 V
V
CC
@ 4.5 V
V
CC
@ 5.5 V
V
CC
@ 4.5 V
V
CC
@ 5.5 V
Parameter
′AC
′ACT
Min
2.0
4.5
0
−
−
−
−
−
−
−40
−
−
Typ
5.0
5.0
−
150
40
25
10
8.0
−
25
−
−
Min
6.0
5.5
V
CC
−
−
−
−
−
140
85
−24
24
ns/V
°C
°C
mA
mA
ns/V
Unit
V
V
t
r
, t
f
T
J
T
A
I
OH
I
OL
1. V
in
from 30% to 70% V
CC
; see individual Data Sheets for devices that differ from the typical input rise and fall times.
2. V
in
from 0.8 V to 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times.
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3
MC74AC652, MC74ACT652
DC CHARACTERISTICS
74AC
Symbol
Parameter
V
CC
(V)
T
A
= +25°C
Typ
V
IH
Minimum High Level
Input Voltage
Maximum Low Level
Input Voltage
Minimum High Level
Output Voltage
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
3.0
4.5
5.5
V
OL
Minimum Low Level
Output Voltage
3.0
4.5
5.5
3.0
4.5
5.5
I
IN
I
OZT
Maximum Input
Leakage Current
Maximum
3-State
Current
†Minimum Dynamic
Output Current
Maximum Quiescent
Supply Current
5.5
1.5
2.25
2.75
1.5
2.25
2.75
2.99
4.49
5.49
−
−
−
0.002
0.001
0.001
−
−
−
−
74AC
T
A
=
−40°C
to
+85°C
Unit
Conditions
Guaranteed Limits
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.56
3.86
4.86
0.1
0.1
0.1
0.36
0.36
0.36
±0.1
2.1
3.15
3.85
0.9
1.35
1.65
2.9
4.4
5.4
2.46
3.76
4.76
0.1
0.1
0.1
0.44
0.44
0.44
±1.0
V
V
OUT
= 0.1 V
or V
CC
−
0.1 V
V
OUT
= 0.1 V
or V
CC
−
0.1 V
I
OUT
=
−
50
μA
V
IL
V
V
OH
V
V
*V
IN
= V
IL
or V
IH
−
12 mA
I
OH
−
24 mA
−
24 mA
I
OUT
= 50
μA
V
V
*V
IN
= V
IL
or V
IH
12 mA
I
OL
24 mA
24 mA
V
I
= V
CC
, GND
V
I
(OE) = V
IL
, V
IH
V
I
= V
CC
, GND
V
O
= V
CC
, GND
V
OLD
= 1.65 V Max
V
OHD
= 3.85 V Min
V
IN
= V
CC
or GND
μA
5.5
5.5
5.5
5.5
−
−
−
−
±0.6
−
−
8.0
±6.0
75
−75
80
μA
mA
mA
μA
I
OLD
I
OHD
I
CC
*All outputs loaded; thresholds on input associated with output under test.
†Maximum test duration 2.0 ms, one input loaded at a time.
NOTE: I
IN
and I
CC
@ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5.5 V.
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4
MC74AC652, MC74ACT652
AC CHARACTERISTICS
74AC
Symbol
Parameter
V
CC
*
(V)
T
A
= +25°C
C
L
= 50 pF
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation Delay
CPBA or CPAB to A
n
or B
n
Propagation Delay
CPBA or CPAB to A
n
or B
n
Propagation Delay
A or B to B
n
or A
n
Propagation Delay
A or B to B
n
or A
n
Propagation Delay
SBA or SAB to A
n
or B
n
Propagation Delay
SBA or SAB to A
n
or B
n
Output Enable Time
OEBA to A
n
Output Enable Time
OEBA to A
n
Output Disable Time
OEBA to A
n
Output Disable Time
OEBA to A
n
3.0
5.0
3.0
5.0
3.0
5.0
3.0
5.0
3.0
5.0
3.0
5.0
3.0
5.0
3.0
5.0
3.0
5.0
3.0
5.0
4.0
2.5
3.0
2.0
3.0
2.0
2.5
1.5
3.0
2.5
2.5
2.0
2.5
1.5
2.5
1.5
3.0
2.0
2.5
2.0
Max
17.0
12.0
14.5
10.5
14.0
9.5
13.0
9.0
14.0
10.0
13.5
10.0
12.0
9.0
12.0
9.0
13.0
11.0
12.5
10.5
74AC
T
A
=
−40°C
to +85°C
C
L
= 50 pF
Min
3.0
2.0
2.5
1.5
2.5
1.5
2.0
1.0
2.5
2.0
2.0
1.5
2.0
1.0
2.0
1.0
2.5
1.5
2.0
1.5
Max
19.0
14.0
16.5
12.0
16.0
11.0
15.0
10.5
16.0
11.5
15.5
11.5
13.5
10.0
14.0
10.5
14.0
12.0
14.0
12.0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
*Voltage Range 3.3 V is 3.3 V
±0.3
V.
Voltage Range 5.0 V is 5.0 V
±0.5
V.
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