Bus Transceiver. 54LVTH245A Datasheet


54LVTH245A Transceiver. Datasheet pdf. Equivalent


Part Number

54LVTH245A

Description

3.3V ABT Octal Bus Transceiver

Manufacture

Maxwell Technologies

Total Page 9 Pages
Datasheet
Download 54LVTH245A Datasheet


54LVTH245A
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54LVTH245A
3.3V ABT Octal Bus Transceiver
with 3-State Output
Logic Diagram (Positive Logic)
FEATURES:
• 3.3V ABT octal bus transceiver with 3-state outputs
• RAD-PAK® radiation hardened against natural space radia-
tion
• Total dose hardness:
- >100 krad (Si), depending upon space misssion
• Package:
- 20 pin RAD-PAK® flat package
- 20 pin RAD-PAK® DIP
• Operating temperature range:
-55 to 125°C
• Supports mixed-mode signal operation
- 5V input and output voltages 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
• Latch-up performance exceeds 500mA per JEDEC stan-
dard
• Supports live insertion
• Bus-hold data inputs eliminate the need for external pullup
resistors
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) VCC operation,
but with the capability to provide a TTL interface to a 5V sys-
tem environment. It is designed for asynchronous communica-
tion 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) input can be used to disable the device so
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 RAD-PAK® packaging technol-
ogy incorporates radiation shielding in the microcircuit pack-
age. 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, RAD-PAK provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Class S.
1000597
12.19.01 Rev 1
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
All data sheets are subject to change without notice 1
©2001 Maxwell Technologies
All rights reserved.

54LVTH245A
3.3V ABT Octal Bus Transceiver
with 3-State Output
54LVTH245A
TABLE 1. PINOUT DESCRIPTION
PIN SYMBOL
DESCRIPTION
1
2-9
10
11-18
19
20
DIR
A1-A8
GND
B8-B1
OE
VCC
DirectionControl
Inputs
Ground
Outputs
Output Enable
Supply Voltage
TABLE 2. 54LVT245 ABSOLUTE MAXIMUM RATINGS 1
PARAMETER
SYMBOL
MIN
MAX
UNIT
Supply Voltage Range
VCC -0.5 4.6
Input Voltage Range 2
VI -0.5 7.0
Voltage Range Applied to Any Output in the High State or Power-Off
VO
-0.5
7.0
State
V
V
V
Current Into Any Output in the High State 3
Input Clamp Current (VI < 0)
Output Clamp Current (VO < 0)
Maximum Power Dissipation at TA = 55°C
Operating Temperature
Storage Temperature Range
IO -- 48 mA
IIK -- -50 mA
IOK -- -50 mA
PD -- 1.6 mW
TA -55 125 °C
TS -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 “rec-
ommended 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.
TABLE 3. DELTA LIMITS
PARAMETER
ICC(OL)
ICC(OH)
ICC(OD)
VARIATION
±10% of specified value in Table 5
±10% of specified value in Table 5
±10% of specified value in Table 5
1000597
12.19.01 Rev 1
All data sheets are subject to change without notice 2
©2001 Maxwell Technologies
All rights reserved.


Features www.DataSheet4U.com PRELIMINARY 3.3V A BT Octal Bus Transceiver with 3-State O utput 54LVTH245A Memory Logic Diagra m (Positive Logic) FEATURES: • 3.3V ABT octal bus transceiver with 3-state outputs • RAD-PAK® radiation hardene d against natural space radiation • T otal dose hardness: - >100 krad (Si), d epending upon space misssion • Packag e: - 20 pin RAD-PAK® flat package - 20 pin RAD-PAK® DIP • Operating temper ature range: -55 to 125°C • Supports mixed-mode signal operation - 5V input and output voltages 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 • Latch-up performance exceeds 500mA per JEDEC standard • Supports l ive insertion • Bus-hold data inputs eliminate the need for external pullup resistors DESCRIPTION: Maxwell Technol ogies’ 54LVTH245A 8-bit octal transce iver micro-circuit features a greater t han 100 krad (Si) total dose tolerance, depending upon space mission. The 54LVTH245A is desi.
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