54LVTH244A - Buffer,/Driver, 8 Bit, 3.3V

54LVTH244A
3.3V ABT 8-Bit Octal
Buffers/Drivers
Memory
Logic Diagram
FEATURES:
DESCRIPTION:
• 3.3V ABT octal buffers/drivers with 3-state outputs
• RAD-PAK® radiation-hardened against natural space radiation
• Package:
- 20 Pin RAD-PAK® flat package
• Operating temperature range:
-55 to 125° C
• Supports mixed-mode signal operation
- 5V input with 3.3V VCC
• Supports unregulated battery operation down to 2.7V
• Typical VOLP (output ground bounce) < 0.8V at VCC=3.3V,
TA=25° C
• Supports live insertion
• Bus-hold data inputs eliminate the need for external pullup
resistors
Maxwell Technologies’ 54LVTH244A octal buffers/drivers
micro-circuit is housed in a Rad-Pak® package. The
54LVTH244A is designed specifically for low voltage (3.3V)
VCC operation, but with the capability to provide a TTL interface to a 5V system environment. The 54LVTH244A is organized as two 4-bit drivers with separate output enable (OE)
inputs. When OE is low, the device passes data from the A
inputs to the Y outputs. When OE is high, the outputs are in
the high impedance state. The 54LVTH244A active bus hold
circuitry is provided to prevent floating data inputs at a valid
logic level and to eliminate the need for pullup resistors.
Maxwell Technologies' patented RAD-PAK® packaging technology incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or a space
mission. This product is available with packaging and screening up to Class S.
01.19.07 Rev 1
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
All data sheets are subject to change without notice
1
©2007 Maxwell Technologies
All rights reserved.
54LVTH244A
3.3V ABT 8-Bit Octal Buffers/Drivers
TABLE 1. PINOUT DESCRIPTION
PIN
SYMBOL
DESCRIPTION
1, 19
1OE-2OE
2, 4, 6, 8
IA1-IA4
Input
3, 5, 7, 9
2Y4-2Y1
Output
10
GND
Ground
11, 13, 15, 17
2A1-2A4
Input
12, 14, 16, 18
1Y4-1Y1
Output
20
VCC
Output Enable
Supply Voltage
TABLE 2. 54LVTH244A ABSOLUTE MAXIMUM RATINGS1
SYMBOL
MIN
NOM
MAX
UNIT
Supply Voltage Range
VCC
-0.5
--
4.6
V
Input Voltage Range 2
VI
-0.5
--
7.0
V
Voltage Range Applied to Any Output in the High State or Power-Off
State
VO
-0.5
--
7.0
V
Current into Any Output in the Low State
IO
--
--
96
mA
Current Into Any Output in the High State 3
IO
--
--
48
mA
Input Clamp Current (VI < 0)
IIK
--
--
-50
mA
Output Clamp Current (VO < 0)
IOK
--
--
-50
mA
Total Power Dissipation at TA = 55 ° C
PD
--
--
650
mW
Thermal Resistance
Tjc
--
11.46
--
--
Weight
--
--
5
--
--
Operating Temperature
TA
-55
--
125
°C
Storage Temperature Range
TS
-65
--
150
°C
Memory
PARAMETER
1. 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 betond those indicated under “Recommended Operating Conditions” is not imp[lied. Exposure to absolute-maximum-rated conditions for extended periods may
affect device reliability.
2. The input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
3. This current flows only when the output is in the high state and VO > VCC.
01.19.07 Rev 1
All data sheets are subject to change without notice
2
©2007 Maxwell Technologies
All rights reserved.
54LVTH244A
3.3V ABT 8-Bit Octal Buffers/Drivers
TABLE 3. DELTA LIMITS
PARAMETER
VARIATION
ICC(OL)
±10% of specified value on Table 5
IOZH
±10% of specified value on Table 5
IOZL
±10% of specified value on Table 5
TABLE 4. 54LVTH244A RECOMMENDED OPERATING CONDITIONS 1
PARAMETER
SYMBOL
MIN
Supply Voltage
VCC
High-level Input Voltage
UNIT
2.7
3.6
V
VIH
2.0
--
V
Low-level Input Voltage
VIL
--
0.8
V
Input Voltage
VI
--
5.5
V
High-level Output Current
IOH
--
-24
mA
Low-level Output Current
IOL
--
48
mA
∆t/∆v
--
10
ns/V
TA
-55
125
°C
Operating Temperature
Memory
MAX
Input Transition Rise or Fall Rate
NOM
1. All unused control inputs must be held high or low to ensure proper device operation.
TABLE 5. 54LVTH244A DC ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±10%, TA = -55 ° C TO 125 ° C, UNLESS OTHERWISE SPECIFIED)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
UNIT
II = -18mA
--
-1.2
V
IOH = -100µ A
VCC -0.2
--
V
VCC = 2.7V
IOH = -8mA
2.4
--
VCC = 3V
IOH = 24mA
2.0
--
VCC = 2.7V
IOL = 100µ A
--
0.2
IOL = 24mA
--
0.5
IOL = 16mA
--
0.4
IOL = 32mA
--
0.5
IOL = 32mA
--
0.55
Input Clamp Voltage
VIK
VCC = 2.7
High-Level Output Voltage
VOH
VCC = 2.7V to 3.6V
Low-Level Output Voltage
VOL
VCC = 3V
01.19.07 Rev 1
V
All data sheets are subject to change without notice
3
©2007 Maxwell Technologies
All rights reserved.
54LVTH244A
3.3V ABT 8-Bit Octal Buffers/Drivers
TABLE 5. 54LVTH244A DC ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±10%, TA = -55 ° C TO 125 ° C, UNLESS OTHERWISE SPECIFIED)
PARAMETER
Input Current
SYMBOL
II
TEST CONDITIONS
VCC = 0 or 3.6V
MIN
VI = VCC
UNIT
10
µA
VCC = 3.6V
VI = VCC or
GND
Control
Inputs
--
±1
VCC = 3.6V
VI = VCC
Data Inputs
--
1
--
-5
75
--
-75
--
VI = 0
Hold Current
MAX
II(HOLD) VCC = 3V
VI = 0.8V
Data Inputs
VI = 2V
µA
Output Disabled Leakage
Current - High
IOZH
VCC = 3.6V, VO = 3V
--
5
µA
Output Disabled Leakage
Current - Low
IOZL
VCC = 3.6V, VO = 0.5V
--
-5
µA
IOZPU2
VCC = 0 to 1.5V, VO = 0.5V to 3V, OE = don’t care
--
±100
µA
Power Down Current
IOZPD2
VCC = 1.5V to 0, VO = 0.5V to 3V, OE = don’t care
--
±100
µA
mA
Supply Current
ICC
VCC = 3.6V
Outputs high
--
0.19
IO = 0
Outputs low
--
5
Outputs
disabled
--
0.19
--
0.2
mA
VI = VCC or GND
Delta Supply Current
∆ICC 1 VCC = 3V to 3.6V, One input at VCC -0.6V, Other inputs
Memory
Power Up Current
at VCC or GND
Input Capacitance
CI2
VI = 3V or 0
--
8
pF
Input Output Capacitance
CO2
VO = 3V or 0
--
15
pF
1. This is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
2. Guaranteed by design.
TABLE 6. 54LVTH244A AC ELECTRICAL CHARACTERISTICS
(TA = -55 ° C TO 125 ° C, CL = 50 PF, UNLESS OTHERWISE SPECIFIED)
PARAMETER
SYMBOL
VCC = 3.3V ± 0.3V
VCC = 2.7V
UNIT
MIN
MAX
MIN
MAX
Propogation Delay Time
A to Y
tPLH
--
4.7
--
4.1
tPHL
--
4.4
--
3.9
Output Enable Time
OE to Y
tPZH
--
6.9
--
6.0
tPZL
--
5.4
--
5.4
Output Disable
OE to Y
tPHZ
--
6.2
--
5.8
tPLZ
--
5.5
--
4.8
01.19.07 Rev 1
ns
ns
ns
All data sheets are subject to change without notice
4
©2007 Maxwell Technologies
All rights reserved.
54LVTH244A
3.3V ABT 8-Bit Octal Buffers/Drivers
TABLE 7. FUNCTION TABLE
(EACH BUFFER)
INPUTS
OUTPUT
OE
A
Y
L
H
H
L
L
L
H
X
Z
FIGURE 1. LOAD CIRCUIT FOR OUTPUTS
Memory
Figure 1 Note:
1. CL includes probe and jog capacitance
PARAMETER MEASUREMENT INFORMATION
TEST
S1
TPLH/TPHL
Open
TPLZ/TPZL
6V
TPHZ/TPZH
GND
FIGURE 2. PULSE DURATION
01.19.07 Rev 1
All data sheets are subject to change without notice
5
©2007 Maxwell Technologies
All rights reserved.
54LVTH244A
3.3V ABT 8-Bit Octal Buffers/Drivers
FIGURE 3. SETUP AND HOLD TIMES
FIGURE 4.PROPAGATION DELAY TIMES INVERTING AND NON-INVERTING OUTPUTS
Memory
FIGURE 5. OUTPUT ENABLE TIMING
Figure Notes:
2. All input pulses are supplied by generators having the following characteristics: PRR < 10 MHz, ZO = 50Ω, tr < 2.5 ns, tf < 2.5
ns.
3. 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.
4. The outputs are measured one at a time with one transition per measurement.
01.19.07 Rev 1
All data sheets are subject to change without notice
6
©2007 Maxwell Technologies
All rights reserved.
54LVTH244A
3.3V ABT 8-Bit Octal Buffers/Drivers
Memory
20 PIN RAD-PAK® FLAT PACKAGE
SYMBOL
DIMENSION
MIN
NOM
MAX
A
0.128
0.141
0.154
b
0.015
0.017
0.022
c
0.003
0.005
0.009
D
0.470
0.480
0.490
E
0.287
0.295
0.303
E1
--
--
0.333
E2
0.155
0.160
--
E3
0.030
0.068
--
e
0.050 BSC
L
0.370
0.380
0.390
Q
0.035
0.039
0.042
S1
0.005
0.007
--
N
20
Note: All dimensions in inches
01.19.07 Rev 1
All data sheets are subject to change without notice
7
©2007 Maxwell Technologies
All rights reserved.
3.3V ABT 8-Bit Octal Buffers/Drivers
54LVTH244A
Important Notice:
These data sheets are created using the chip manufacturer’s published specifications. Maxwell Technologies verifies
functionality by testing key parameters either by 100% testing, sample testing or characterization.
The specifications presented within these data sheets represent the latest and most accurate information available to
date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no
responsibility for the use of this information.
Maxwell Technologies’ products are not authorized for use as critical components in life support devices or systems
without express written approval from Maxwell Technologies.
Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Technologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts.
Memory
01.19.07 Rev 1
All data sheets are subject to change without notice
8
©2007 Maxwell Technologies
All rights reserved.
54LVTH244A
3.3V ABT 8-Bit Octal Buffers/Drivers
Product Ordering Options
Model Number
54LVTH244A
RP
F
X
Option Details
Feature
Monolithic
S = Maxwell Class S
B = Maxwell Class B
I = Industrial (testing @ -55°C,
+25°C, +125°C)
E = Engineering (testing @ +25°C)
Package
F = Flat Pack
Radiation Feature
RP = RAD-PAK® package
Base Product
Nomenclature
3.3V ABT 8-Bit Octal Buffers/Drivers
01.19.07 Rev 1
All data sheets are subject to change without notice
Memory
Screening Flow
9
©2007 Maxwell Technologies
All rights reserved.
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