74LVT244B; 74LVTH244B
3.3 V octal buffer/line driver; 3-state
Rev. 4 — 14 June 2017
Product data sheet
1
General description
The 74LVT244B; 74LVTH244B is a high-performance BiCMOS product designed for V
CC
operation at 3.3 V.
This device is an octal buffer that is ideal for driving bus lines. The device features two
output enable inputs (1OE and 2OE), each controlling four of the 3-state outputs.
2
Features and benefits
•
•
•
•
•
•
•
•
•
•
•
Octal bus interface
3-state buffers
Speed upgrade of 74LVT244A
Output capability: +64 mA and -32 mA
TTL input and output switching levels
Input and output interface capability to systems at 5 V supply
Bus hold data inputs eliminate need for external pull-up resistors to hold unused inputs
Power-up 3-state
Live insertion and extraction permitted
No bus current loading when output is tied to 5 V bus
Latch-up protection:
–
JESD78: exceeds 500 mA
•
ESD protection:
–
HBM EIA/JESD22-A114-C exceeds 2000 V
–
MM EIA/JESD22-A115-A 200 V
3
Ordering information
Package
Temperature
range
Name
SO20
SSOP20
TSSOP20
Table 1. Ordering information
Type number
Description
plastic small outline package; 20 leads;
body width 7.5 mm
plastic shrink small outline package; 20 leads;
body width 5.3 mm
Version
SOT163-1
SOT339-1
74LVT244BD
74LVTH244BD
74LVT244BDB
74LVTH244BDB
74LVT244BPW
74LVTH244BPW
-40 °C to +85 °C
-40 °C to +85 °C
-40 °C to +85 °C
plastic thin shrink small outline package; 20 leads; SOT360-1
body width 4.4 mm
Nexperia
74LVT244B; 74LVTH244B
3.3 V octal buffer/line driver; 3-state
4
Functional diagram
2
1A0
1Y0
18
4
1A1
1Y1
16
6
1A2
1Y2
14
8
1
1A3
1OE
1Y3
12
1
EN
18
16
14
12
2
2A0
2Y0
4
9
11
6
8
13
2A1
2Y1
7
15
2A2
2Y2
19
5
EN
9
7
5
3
mna826
17
19
2A3
2OE
2Y3
11
3
13
15
17
mna825
Figure 1. Logic symbol
Figure 2. IEC logic symbol
74LVT_LVTH244B
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2017. All rights reserved.
Product data sheet
Rev. 4 — 14 June 2017
2 / 15
Nexperia
74LVT244B; 74LVTH244B
3.3 V octal buffer/line driver; 3-state
5
Pinning information
5.1 Pinning
74LVT244B
74LVTH244B
1OE
1A0
2Y3
1A1
2Y2
1A2
2Y1
1A3
2Y0
1
2
3
4
5
6
7
8
9
20 V
CC
19 2OE
18 1Y0
17 2A3
16 1Y1
15 2A2
14 1Y2
13 2A1
12 1Y3
11 2A0
001aae463
GND 10
Figure 3. Pin configuration SO20, SSOP20 and TSSOP20
5.2 Pin description
Table 2. Pin description
Symbol
1OE, 2OE
1A0, 1A1, 1A2, 1A3
2Y0, 2Y1, 2Y2, 2Y3
GND
2A0, 2A1, 2A2, 2A3
1Y0, 1Y1, 1Y2, 1Y3
V
CC
Pin
1, 19
2, 4, 6, 8
9, 7, 5, 3
10
11, 13, 15, 17
18, 16, 14, 12
20
Description
output enable input (active low)
data input
data output
ground (0 V)
data input
data output
supply voltage
6
Functional description
[1]
Table 3. Function table
Control
nOE
L
L
H
[1]
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care;
Z = high-impedance OFF-state.
Input
nAn
L
H
X
Output
nYn
L
H
Z
74LVT_LVTH244B
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2017. All rights reserved.
Product data sheet
Rev. 4 — 14 June 2017
3 / 15
Nexperia
74LVT244B; 74LVTH244B
3.3 V octal buffer/line driver; 3-state
7
Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
CC
V
I
V
O
I
IK
I
OK
I
O
T
stg
T
j
P
tot
[1]
[2]
[3]
Conditions
[1]
Min
-0.5
-0.5
-0.5
-50
-50
-
-64
-65
[2]
Max Unit
+4.6
+7.0
+7.0
-
-
128
-
150
500
V
V
V
mA
mA
mA
mA
°C
mW
supply voltage
input voltage
output voltage
input clamping current
output clamping current
output current
storage temperature
junction temperature
total power dissipation
T
amb
= -40 to +85 °C
[3]
output in OFF-state or HIGH-state
V
I
< 0 V
V
O
< 0 V
output in LOW-state
output in HIGH-state
[1]
+150 °C
-
-
The input and output negative voltage ratings may be exceeded if the input and output clamp current ratings are observed.
The performance capability of a high-performance integrated circuit in conjunction with its thermal environment can create junction temperatures which
are detrimental to reliability.
For SO20 packages: above 70 °C derate linearly with 8 mW/K.
For SSOP20 and TSSOP20 packages: above 60 °C derate linearly with 5.5 mW/K.
8
Recommended operating conditions
Conditions
Min
2.7
0
-32
none
current duty cycle ≤ 50 %; f
i
≥ 1 kHz
in free-air
outputs enabled
-
-
-40
-
Table 5. Operating conditions
Symbol Parameter
V
CC
V
I
I
OH
I
OL
T
amb
Δt/ΔV
supply voltage
input voltage
HIGH-level output current
LOW-level output current
ambient temperature
input transition rise and fall rate
Typ
-
-
-
-
-
-
-
Max Unit
3.6
5.5
-
32
64
+85
10
V
V
mA
mA
mA
°C
ns/V
74LVT_LVTH244B
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2017. All rights reserved.
Product data sheet
Rev. 4 — 14 June 2017
4 / 15
Nexperia
74LVT244B; 74LVTH244B
3.3 V octal buffer/line driver; 3-state
9
Static characteristics
Table 6. Static characteristics
At recommended operating conditions; Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
T
amb
= -40 °C to +85 °C
V
IK
V
IH
V
IL
V
OH
input clamping voltage
HIGH-level input voltage
LOW-level input voltage
HIGH-level output voltage
Conditions
V
CC
= 2.7 V; I
IK
= -18 mA
Min
-1.2
2.0
-
Typ
[1]
Max Unit
-
-
0.8
-
-
-
0.2
0.5
0.4
0.5
0.55
10
1
1
-
-
-75
-
-500
125
V
V
V
V
V
V
V
V
V
V
V
μA
μA
μA
μA
μA
μA
μA
μA
μA
-0.9
-
-
2.5
2.2
0.1
0.3
0.25
0.3
0.4
0.1
±0.1
0.1
-1
1
130
-140
-
-
60
±1
V
CC
= 2.7 V; I
OH
= -100 μA
V
CC
= 2.7 V; I
OH
= -8 mA
V
CC
= 3.0 V; I
OH
= -32 mA
V
CC
- 2.0 V
CC
- 2.1
2.4
2.0
-
-
-
-
-
-
-1
[2]
V
OL
LOW-level output voltage
V
CC
= 2.7 V; I
OL
= 100 μA
V
CC
= 2.7 V; I
OL
= 24 mA
V
CC
= 3.0 V; I
OL
= 16 mA
V
CC
= 3.0 V; I
OL
= 32 mA
V
CC
= 3.0 V; I
OL
= 64 mA
I
I
input leakage current
all input pins
V
CC
= 0 V or 3.6 V; V
I
= 5.5 V
control pins
V
CC
= 3.6 V; V
I
= V
CC
or GND
data pins
V
CC
= 3.6 V; V
I
= V
CC
V
CC
= 3.6 V; V
I
= 0 V
-
-5
-100
75
-
[3]
I
OFF
I
BHL
I
BHH
I
BHLO
I
BHHO
I
EX
I
O(pu/pd)
I
OZ
power-off leakage current
bus hold LOW current
bus hold HIGH current
bus hold LOW overdrive
current
bus hold HIGH overdrive
current
external current
power-up/power-down
output current
OFF-state output current
V
CC
= 0 V; V
I
or V
O
= 0 V to 4.5 V
V
CC
= 3 V; V
I
= 0.8 V
V
CC
= 3 V; V
I
= 2.0 V
V
CC
= 3.6 V; V
I
= 0 V to 3.6 V
V
CC
= 3.6 V; V
I
= 0 V to 3.6 V
nYn output in HIGH-state when
V
O
> V
CC
; V
O
= 5.5 V;V
CC
= 3.3 V
V
CC
≤ 1.2 V; V
O
= 0.5 V to V
CC
;
V
I
= GND or V
CC
; nOE = don’t care
V
CC
= 3.6 V; V
I
= V
IH
or V
IL
V
O
= 3.0 V
V
O
= 0.5 V
[4]
+100 μA
500
-
-
-100
+100 μA
-
-5
-
1
-1
0.13
5
-
0.19
μA
μA
mA
I
CC
supply current
V
CC
= 3.6 V; V
I
= GND or V
CC
; I
O
= 0 A
output HIGH
74LVT_LVTH244B
All information provided in this document is subject to legal disclaimers.
© Nexperia B.V. 2017. All rights reserved.
Product data sheet
Rev. 4 — 14 June 2017
5 / 15
传感器
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