MAXWELL 54LVTH245ARPFS, 54LVTH245ARPFI, 54LVTH245ARPFE, 54LVTH245ARPFB Datasheet
PRELIMINARY
54LVTH245A
3.3V ABT Octal Bus Transceiver
with 3-State Output
Memory
Logic Diagram (Positive Logic)
FEATURES:
• 3.3V ABT octal bus transceiver with 3-state outputs
•R
AD-PAK® radiation hardened against natural space radia-
tion
• Total dose hardness:
- >100 krad (Si), depending upon space misssion
• Package:
- 20 pin R
- 20 pin R
• Operating temperature range:
-55 to 125
• Supports mixed-mode signal operation
- 5V input and output voltages with 3.3V V
• Supports unregulated battery operation down to 2.7V.
• Typical VOLP (output ground bounce) < 0.8V at V
T
A
• Latch-up performance exceeds 500mA per JEDEC standard
• Supports live insertion
• Bus-hold data inputs eliminate the need for external pullup
resistors
AD-PAK® flat package
AD-PAK® DIP
°
C
= 25°C
CC
=3.3V,
CC
DESCRIPTION:
Maxwell Technologies’ 54LVTH245A 8-bit octal transceiver
micro-circuit features a greater than 100 krad (Si) total dose
tolerance, depending upon space mission. The 54LVTH245A
is designed specifically for low voltage (3.3V) V
but with the capability to provide a TTL interface to a 5V system environment. It is designed for asynchronous communication between data buses. The device transmits data from the
A bus to the B bus or from the B bus to the A bus depending
upon the logic level at the direction control (DIR) input. The
output enable (OE
the buses are effectively isolated. The 54LVTH245A active
bus-hold circuitry is provided to prevent floating data inputs at
a valid logic level and to eliminate the need for external pullup
resistors.
Maxwell Technologies' patented R
ogy 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 space
mission. In a GEO orbit, R
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.
) input can be used to disable the device so
AD-PAK® packaging technol-
AD-PAK provides greater than 100
operation,
CC
1000597
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
12.19.01 Rev 1
All data sheets are subject to change without notice
©2001 Maxwell Technologies
All rights reserved.
1
3.3V ABT Octal Bus Transceiver
with 3-State Output
TABLE 1. PINOUT DESCRIPTION
PRELIMINARY
PIN SYMBOL DESCRIPTION
1 DIR DirectionControl
2-9 A1-A8 Inputs
10 GND Ground
11-18 B8-B1 Outputs
19 OE
20 V
CC
54LVTH245A
Output Enable
Supply Voltage
TABLE 2. 54LVT245 ABSOLUTE MAXIMUM RATINGS
ARAMETER SYMBOL MIN MAX UNIT
P
Supply Voltage Range V
Input Voltage Range
2
Voltage Range Applied to Any Output in the High State or Power-Off
CC
V
I
V
O
1
-0.5 4.6 V
-0.5 7.0 V
-0.5 7.0 V
State
Current Into Any Output in the High State
Input Clamp Current (V
Output Clamp Current (V
Maximum Power Dissipation at T
< 0) I
I
< 0) I
O
A
3
= 55°CP
Operating Temperature T
Storage Temperature Range T
I
OK
O
IK
D
A
S
-- 48 mA
-- -50 mA
-- -50 mA
-- 1.6 mW
-55 125 °C
-65 150
°
C
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 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 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.
Memory
1000597
TABLE 3. DELTA LIMITS
PARAMETER VARIATION
I
CC(OL)
I
CC(OH)
I
CC(OD)
±10% of specified value in Table 5
±10% of specified value in Table 5
±10% of specified value in Table 5
12.19.01 Rev 1
All data sheets are subject to change without notice
©2001 Maxwell Technologies
All rights reserved.
2
3.3V ABT Octal Bus Transceiver
with 3-State Output
54LVTH245A
TABLE 4. 54LVTH245A RECOMMENDED OPERATING CONDITIONS
PRELIMINARY
ARAMETER SYMBOL MIN MAX UNIT
P
Supply Voltage V
High-level Input Voltage V
Low-level Input Voltage V
Input Voltage V
High-level Output Current I
Low-level Output Current I
Input Transition Rise or Fall Rate Outputs
∆t/∆v-- 10 ns/V
CC
IH
IL
I
OH
OL
2.7 3.6 V
2.0 -- V
-- 0.8 V
-- 5.5 V
-- -24 mA
-- 48 mA
1
enabled
Operating Temperature T
A
-55 125
1. Unused control inputs must be held high or low to prevent them from floating.
TABLE 5. 54LVTH245A ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±10%, TA = -55 to +125°C, UNLESS OTHERWISE SPECIFIED)
P
ARAMETER SYMBOL TEST CONDITIONS MIN MAX UNIT
°
C
Memory
Input Clamp Voltage V
High-Level Output Voltage V
Low-Level Output Voltage V
Input Current I
Hold Current I
Power Up Current I
Power Down Current I
I(HOLD)VCC
OZPU
OZPD
VCC = 2.7 II = -18mA -- -1.2 V
IK
OHVCC
OL
I
= 2.7V to 3.6V IOH = -100µA VCC -0.2 -- V
V
= 2.7V IOH = -8mA 2.4 --
CC
V
= 3V, IOH = -24mA 2.0 --
CC
VCC = 2.7V IOL = 100µA -- 0.2 V
I
= 24mA -- 0.5
OL
V
= 3V IOL = 16mA -- 0.4
CC
I
= 32mA -- 0.5
OL
I
= 48mA -- 0.55
OL
VCC = 3.6V VI = VCC or GND Control inputs -- ±1 µA
V
= 0 or 3.6V VI = 5.5V -- 10
CC
V
= 3.6V VI = 5.5V A or B Ports -- 20
CC
V
= V
I
CC
V
= 0 -- -5
I
= 3V VI = 0.8V A or B Ports 75 -- µA
V
= 2V -75 --
I
2
VCC = 0 to 1.5V, VO = 0.5V to 3V, OE = don’t care -- ±100 µA
2
V
= 1.5V to 0, VO = 0.5V to 3V, OE = don’t care -- ±100 µA
CC
1
1000597
12.19.01 Rev 1
All data sheets are subject to change without notice
©2001 Maxwell Technologies
All rights reserved.
3
Loading...