SN74LVT244B
3.3-V ABT OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCAS354J − FEBRUARY 1994 − REVISED SEPTEMBER 2003
D Supports Mixed-Mode Signal Operation
D
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
VCC
2OE
1Y1
2A4
1Y2
2A3
1Y3
2A2
1Y4
2A1
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
1
20
19 2OE
18 1Y1
2
3
17 2A4
16 1Y2
4
5
15 2A3
14 1Y3
6
7
13 2A2
12 1Y4
8
9
10
11
2A1
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
RGY PACKAGE
(TOP VIEW)
VCC
DB, DW, NS, OR PW PACKAGE
(TOP VIEW)
1OE
D
D
Insertion
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
ESD Protection Exceeds JESD 22
− 2000-V Human-Body Model (A114-A)
− 200-V Machine Model (A115-A)
− 1000-V Charged-Device Model (C101)
GND
D
D Ioff and Power-Up 3-State Support Hot
(5-V Input and Output Voltages With
3.3-V VCC)
Supports Unregulated Battery Operation
Down to 2.7 V
Typical VOLP (Output Ground Bounce)
VCC.
3. The package thermal impedance is calculated in accordance with JESD 51-7.
4. The package thermal impedance is calculated in accordance with JESD 51-5.
recommended operating conditions (see Note 5)
MIN
MAX
2.7
3.6
UNIT
VCC
Supply voltage
VIH
High-level input voltage
VIL
Low-level input voltage
VI
Input voltage
5.5
V
IOH
High-level output current
−32
mA
IOL
Low-level output current
Δt/Δv
Input transition rise or fall rate
Δt/ΔVCC
Power-up ramp rate
200
TA
Operating free-air temperature
−40
2
V
0.8
Outputs enabled
V
V
64
mA
10
ns/V
μs/V
85
°C
NOTE 5: All unused inputs of the device must 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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
SN74LVT244B
3.3-V ABT OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCAS354J − FEBRUARY 1994 − REVISED SEPTEMBER 2003
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
TEST CONDITIONS
VCC = 2.7 V,
II = −18 mA
VCC = 2.7 V to 3.6 V,
IOH = −100 μA
VCC = 2.7 V,
IOH = −8 mA
VCC = 3 V,
IOH = −32 mA
VCC = 2
2.7
7V
VOL
VCC = 3 V
Control inputs
II
Data inputs
†
‡
MIN
TYP†
MAX
UNIT
−1.2
V
VCC−0.2
2.4
V
2
IOL = 100 μA
0.2
IOL = 24 mA
0.5
IOL = 16 mA
0.4
IOL = 32 mA
0.5
IOL = 64 mA
0.55
VCC = 0 or 3.6 V,
VI = 5.5 V
10
VCC = 3.6 V,
VI = VCC or GND
±1
VI = VCC
VCC = 3
3.6
6V
1
VI = 0
V
μA
A
−5
±100
μA
5
μA
−5
μA
±100
μA
Ioff
VCC = 0,
VI or VO = 0 to 4.5 V
IOZH
VCC = 3.6 V,
VO = 3 V
IOZL
VCC = 3.6 V,
VO = 0.5 V
IOZPU
VCC = 0 to 1.5 V, VO = 0.5 V to 3 V, OE = don’t care
IOZPD
VCC = 1.5 V to 0, VO = 0.5 V to 3 V, OE = don’t care
±100
μA
ICC
VCC = 3.6 V,
IO = 0,
VI = VCC or GND
Outputs high
0.19
Outputs low
5
Outputs disabled
mA
0.19
ΔICC‡
VCC = 3 V to 3.6 V, One input at VCC − 0.6 V,
Other inputs at VCC or GND
Ci
VI = 3 V or 0
4
pF
Co
VO = 3 V or 0
7
pF
0.2
mA
All typical values are at VCC = 3.3 V, TA = 25°C.
This is the increase in supply current for each input that is at the specified TTL voltage level, rather than VCC or GND.
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
†
4
FROM
(INPUT)
TO
(OUTPUT)
A
Y
OE
Y
OE
Y
All typical values are at VCC = 3.3 V, TA = 25°C.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
VCC = 3.3 V
± 0.3 V
VCC = 2.7 V
MIN
TYP†
MAX
1.1
2.3
3.5
3.8
1.3
2.1
3.3
3.6
1.1
2.5
4.5
5.3
1.4
2.7
4.4
4.9
1.9
2.8
4.4
4.5
1.8
2.9
4.4
4.4
MIN
UNIT
MAX
ns
ns
ns
SN74LVT244B
3.3-V ABT OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCAS354J − FEBRUARY 1994 − REVISED SEPTEMBER 2003
PARAMETER MEASUREMENT INFORMATION
500 Ω
From Output
Under Test
6V
Open
S1
GND
CL = 50 pF
(see Note A)
500 Ω
TEST
S1
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
Open
6V
GND
2.7 V
LOAD CIRCUIT
Timing Input
1.5 V
0V
tw
tsu
th
2.7 V
1.5 V
Input
2.7 V
1.5 V
Data Input
1.5 V
1.5 V
0V
0V
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
2.7 V
2.7 V
1.5 V
Input
Output
Control
1.5 V
0V
tPLH
Output
Waveform 1
S1 at 6 V
(see Note B)
VOH
1.5 V
VOL
tPHL
VOH
Output
1.5 V
tPLZ
3V
1.5 V
tPZH
tPLH
1.5 V
VOL
Output
Waveform 2
S1 at GND
(see Note B)
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
1.5 V
0V
tPZL
tPHL
1.5 V
Output
1.5 V
VOL + 0.3 V
VOL
tPHZ
1.5 V
VOH − 0.3 V
VOH
≈0 V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
NOTES: A. CL includes probe and jig 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. All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
D. The outputs are measured one at a time with one transition per measurement.
E. All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuit and Voltage Waveforms
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
PACKAGE OPTION ADDENDUM
www.ti.com
14-Oct-2022
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)
Samples
(4/5)
(6)
SN74LVT244BDBR
ACTIVE
SSOP
DB
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LX244B
Samples
SN74LVT244BDW
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LVT244B
Samples
SN74LVT244BDWG4
ACTIVE
SOIC
DW
20
25
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LVT244B
Samples
SN74LVT244BDWR
ACTIVE
SOIC
DW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LVT244B
Samples
SN74LVT244BDWRE4
ACTIVE
SOIC
DW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LVT244B
Samples
SN74LVT244BNSR
ACTIVE
SO
NS
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LVT244B
Samples
SN74LVT244BPW
ACTIVE
TSSOP
PW
20
70
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LX244B
Samples
SN74LVT244BPWE4
ACTIVE
TSSOP
PW
20
70
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LX244B
Samples
SN74LVT244BPWG4
ACTIVE
TSSOP
PW
20
70
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LX244B
Samples
SN74LVT244BPWR
ACTIVE
TSSOP
PW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LX244B
Samples
SN74LVT244BPWRE4
ACTIVE
TSSOP
PW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LX244B
Samples
SN74LVT244BPWRG4
ACTIVE
TSSOP
PW
20
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
-40 to 85
LX244B
Samples
SN74LVT244BRGYR
ACTIVE
VQFN
RGY
20
3000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 85
LX244B
Samples
(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
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