INTEGRATED CIRCUITS
74ABT373A
Octal transparent latch (3-State)
Product specification
IC23 Data Handbook
1995 Feb 17
Philips
Semiconductors
Philips Semiconductors
Product specification
Octal transparent latch (3-State)
74ABT373A
FEATURES
•
8-bit transparent latch
•
3-State output buffers
•
Output capability: +64mA/–32mA
•
Latch-up protection exceeds 500mA per JEDEC Std 17
•
ESD protection exceeds 2000 V per MIL STD 883 Method 3015
and 200 V per Machine Model
DESCRIPTION
The 74ABT373A high-performance BiCMOS device combines low
static and dynamic power dissipation with high speed and high
output drive.
The 74ABT373A device is an octal transparent latch coupled to
eight 3-State output buffers. The two sections of the device are
controlled independently by Enable (E) and Output Enable (OE)
control gates.
The data on the D inputs are transferred to the latch outputs when
the Latch Enable (E) input is High. The latch remains transparent to
the data inputs while E is High, and stores the data that is present
one setup time before the High-to-Low enable transition.
The 3-State output buffers are designed to drive heavily loaded
3-State buses, MOS memories, or MOS microprocessors. The
active-Low Output Enable (OE) controls all eight 3-State buffers
independent of the latch operation.
When OE is Low, the latched or transparent data appears at the
outputs. When OE is High, the outputs are in the High-impedance
“OFF” state, which means they will neither drive nor load the bus.
•
Power-up 3-State
•
Power-up reset
•
Live insertion/extraction permitted
QUICK REFERENCE DATA
SYMBOL
t
PLH
t
PHL
C
IN
C
OUT
I
CCZ
PARAMETER
Propagation delay
Dn to Qn
Input capacitance
Output capacitance
Total supply current
CONDITIONS
T
amb
= 25°C; GND = 0V
C
L
= 50pF; V
CC
= 5V
V
I
= 0V or V
CC
Outputs disabled; V
O
= 0V or V
CC
Outputs disabled; V
CC
=5.5V
TYPICAL
3.2
3.6
4
7
100
UNIT
ns
pF
pF
µA
ORDERING INFORMATION
PACKAGES
20-Pin Plastic DIP
20-Pin plastic SO
20-Pin Plastic SSOP Type II
20-Pin Plastic TSSOP Type I
TEMPERATURE RANGE
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
–40°C to +85°C
OUTSIDE NORTH AMERICA
74ABT373A N
74ABT373A D
74ABT373A DB
74ABT373A PW
NORTH AMERICA
74ABT373A N
74ABT373A D
74ABTD373A B
7ABT373APW DH
DWG NUMBER
SOT146-1
SOT163-1
SOT339-1
SOT360-1
PIN CONFIGURATION
PIN DESCRIPTION
PIN NUMBER
1
SYMBOL
OE
D0-D7
Q0-Q7
E
GND
V
CC
FUNCTION
Output enable input (active-Low)
Data inputs
Data outputs
Enable input (active-High)
Ground (0V)
Positive supply voltage
OE
Q0
D0
D1
Q1
Q2
D2
D3
Q3
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
V
CC
Q7
D7
D6
Q6
Q5
D5
D4
Q4
E
3, 4, 7, 8, 13,
14, 17, 18
2, 5, 6, 9, 12,
15, 16, 19
11
10
20
GND 10
SA00059
1995 Feb 17
2
853-1454 14852
Philips Semiconductors
Product specification
Octal transparent latch (3-State)
74ABT373A
LOGIC SYMBOL
3
4
7
8
13 14 17
18
LOGIC SYMBOL (IEEE/IEC)
1
11
EN
C1
D0 D1 D2 D3 D4 D5 D6 D7
11
1
E
OE
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
8
13
2
5
6
9
12 15 16
19
14
17
3
4
7
1D
2
5
6
9
12
15
16
19
SA00060
18
FUNCTION TABLE
INPUTS
OE
L
L
L
L
L
E
H
H
↓
↓
L
Dn
L
H
l
h
X
INTERNAL
REGISTER
L
H
L
H
NC
OUTPUTS
Q0 – Q7
L
H
L
H
NC
OPERATING
MODE
Enable and read
register
Latch and read
register
Hold
SA00061
H
L
X
NC
Z
Disable outputs
H
H
Dn
Dn
Z
H = High voltage level
h = High voltage level one set-up time prior to the High-to-Low E
transition
L = Low voltage level
l = Low voltage level one set-up time prior to the High-to-Low E
transition
NC= No change
X = Don’t care
Z = High impedance “off” state
↓
= High-to-Low E transition
LOGIC DIAGRAM
D0
3
D1
4
D2
7
D3
8
D4
13
D5
14
D6
17
D7
18
D
D
D
D
D
D
D
D
E
Q
E
Q
E
Q
E
Q
E
Q
E
Q
E
Q
E
Q
11
E
1
OE
2
Q0
5
Q1
6
Q2
9
Q3
12
Q4
15
Q5
16
Q6
19
Q7
SA00062
1995 Feb 17
3
Philips Semiconductors
Product specification
Octal transparent latch (3-State)
74ABT373A
ABSOLUTE MAXIMUM RATINGS
1, 2
SYMBOL
V
CC
I
IK
V
I
I
OK
V
OUT
I
OUT
T
stg
PARAMETER
DC supply voltage
DC input diode current
DC input voltage
3
DC output diode current
DC output voltage
3
DC output current
Storage temperature range
V
O
< 0
output in Off or High state
output in Low state
V
I
< 0
CONDITIONS
RATING
–0.5 to +7.0
–18
–1.2 to +7.0
–50
–0.5 to +5.5
128
–65 to 150
UNIT
V
mA
V
mA
V
mA
°C
NOTES:
1. Stresses beyond those listed 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.
2. The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction
temperatures which are detrimental to reliability. The maximum junction temperature of this integrated circuit should not exceed 150°C.
3. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
RECOMMENDED OPERATING CONDITIONS
LIMITS
SYMBOL
V
CC
V
I
V
IH
V
IL
I
OH
I
OL
∆t/∆v
T
amb
DC supply voltage
Input voltage
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Input transition rise or fall rate
Operating free-air temperature range
0
–40
PARAMETER
Min
4.5
0
2.0
0.8
–32
64
5
+85
Max
5.5
V
CC
V
V
V
V
mA
mA
ns/V
°C
UNIT
1995 Feb 17
4
Philips Semiconductors
Product specification
Octal transparent latch (3-State)
74ABT373A
DC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
T
amb
= +25°C
Min
V
IK
Input clamp voltage
V
CC
= 4.5V; I
IK
= –18mA
V
CC
= 4.5V; I
OH
= –3mA; V
I
= V
IL
or V
IH
V
OH
High-level output voltage
V
CC
= 5.0V; I
OH
= –3mA; V
I
= V
IL
or V
IH
V
CC
= 4.5V; I
OH
= –32mA; V
I
= V
IL
or V
IH
V
OL
V
RST
I
I
I
OFF
I
PU
/I
PD
I
OZH
I
OZL
I
CEX
I
O
I
CCH
I
CCL
I
CCZ
∆I
CC
Additional supply current per
input pin
2
Quiescent su ly current
supply
Low-level output voltage
Power-up output low
voltage
3
Input leakage current
Power-off leakage current
Power-up/down 3-State
output current
3-State output High current
3-State output Low current
Output High leakage current
Output current
1
V
CC
= 4.5V; I
OL
= 64mA; V
I
= V
IL
or V
IH
V
CC
= 5.5V; I
O
= 1mA; V
I
= GND or V
CC
V
CC
= 5.5V; V
I
= GND or 5.5V
V
CC
= 0.0V; V
O
or V
I
≤
4.5V
V
CC
= 2.0V; V
O
= 0.5V; V
OE
= Don’t Care V
1
= GND or V
CC
V
CC
= 5.5V; V
O
= 2.7V; V
I
= V
IL
or V
IH
V
CC
= 5.5V; V
O
= 0.5V; V
I
= V
IL
or V
IH
V
CC
= 5.5V; V
O
= 5.5V; V
I
= GND or V
CC
V
CC
= 5.5V; V
O
= 2.5V
V
CC
= 5.5V; Outputs High, V
I
= GND or V
CC
V
CC
= 5.5V; Outputs Low, V
I
= GND or V
CC
V
CC
= 5.5V; Outputs 3-State;
V
I
= GND or V
CC
V
CC
= 5.5V; one input at 3.4V,
other inputs at V
CC
or GND
–50
2.5
3.0
2.0
Typ
–0.9
2.9
3.4
2.4
0.3
0.13
±0.01
±5.0
±5.0
0.1
–0.1
5.0
–100
100
24
100
0.5
0.55
0.55
±1.0
±100
±50
50
–50
50
–180
250
30
250
1.5
–50
Max
–1.2
2.5
3.0
2.0
0.55
0.55
±1.0
±100
±50
50
–50
50
–180
250
30
250
1.5
T
amb
= –40°C
to +85°C
Min
Max
–1.2
V
V
V
V
V
V
µA
µA
µA
µA
µA
µA
mA
µA
mA
µA
mA
UNIT
NOTES:
1. Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
2. This is the increase in supply current for each input at 3.4V.
3. For valid test results, data must not be loaded into the flip-flops (or latches) after applying the power.
AC CHARACTERISTICS
GND = 0V, t
R
= t
F
= 2.5ns, C
L
= 50pF, R
L
= 500Ω
LIMITS
SYMBOL
PARAMETER
WAVEFORM
Min
t
PLH
t
PHL
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Propagation delay
Dn to Qn
Propagation delay
E to Qn
Output enable time
to High and Low level
Output disable time
from High and Low level
2
1
4
5
4
5
1.4
1.4
1.4
1.9
1.2
2.1
1.3
1.2
T
amb
= +25
o
C
V
CC
= +5.0V
Typ
3.2
3.6
3.2
3.7
3.1
4.2
3.4
3.0
Max
4.2
4.7
4.2
4.8
4.2
5.2
4.6
4.1
T
amb
= -40 to
+85
o
C
V
CC
= +5.0V
±0.5V
Min
1.4
1.4
1.4
1.9
1.2
2.1
1.3
1.2
Max
4.7
5.1
4.8
5.1
5.1
5.7
5.1
4.3
ns
ns
ns
ns
UNIT
1995 Feb 17
5
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