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54LVTH245A 데이터시트 PDF




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부품번호 54LVTH245A 기능
기능 3.3V ABT Octal Bus Transceiver
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54LVTH245A 데이터시트, 핀배열, 회로
www.DataSheet4U.com
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 pdf, 반도체, 판매, 대치품
3.3V ABT Octal Bus Transceiver
with 3-State Output
54LVTH245A
TABLE 5. 54LVTH245A ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±10%, TA = -55 to +125°C, UNLESS OTHERWISE SPECIFIED)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN MAX UNIT
Supply Current
Delta Supply Current
Input Capacitance
Input Output Capacitance
ICC
ICC 1
CI2
CO2
VCC = 3.6V
Outputs high
IO = 0
Outputs low
VI = VCC or GND
Outputs disabled
VCC = 3V to 3.6V, One input at VCC -0.6V, Other inputs at
VCC or GND
VI = 3V or 0
VO = 3V or 0
--
--
--
--
--
--
0.39 mA
14
0.39
0.2 mA
8 pF
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.
PARAMETER
TABLE 6. 54LVTH245A AC ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±10%, TA = -55 RO 125°C, UNLESS OTHERWISE NOTED)
SYMBOL
VCC = 3.3V ± 0.3V
VCC = 2.7V
MIN MAX MIN MAX
Propagation Delay Time
tPLH
0.7
3.7
--
4.2
A orB to B or A tPHL 0.7 3.7 -- 4.2
Output Enable Time
tPZH
1.2
5.7
--
7.4
OE to A or B tPZL 1.6 5.7 -- 6.8
Output Disable Time
tPHZ
1.8
6.2
--
6.8
OE to A or B tPLZ 1.8 5.3 -- 5.5
TABLE 7. FUNCTION TABLE
INPUTS
OPERATION
OE DIR
L L B data to A bus
l H A data to B bus
H X Isolation
UNIT
ns
ns
ns
1000597
12.19.01 Rev 1
All data sheets are subject to change without notice 4
©2001 Maxwell Technologies
All rights reserved.

4페이지










54LVTH245A 전자부품, 판매, 대치품
3.3V ABT Octal Bus Transceiver
with 3-State Output
54LVTH245A
SYMBOL
A
b
c
D
E
E1
E2
E3
e
L
Q
S1
N
1000597
20 PIN RAD-PAK® FLAT PACKAGE
DIMENSION
MIN
0.128
0.015
0.003
0.470
0.287
--
0.155
0.030
0.370
0.035
0.005
NOM
0.141
0.017
0.005
0.480
0.295
--
0.160
0.068
0.050 BSC
0.380
0.039
0.007
20
F20-01
Note: All dimensions in inches
MAX
0.154
0.022
0.009
0.490
0.303
0.333
--
--
0.390
0.042
--
12.19.01 Rev 1
All data sheets are subject to change without notice 7
©2001 Maxwell Technologies
All rights reserved.

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54LVTH245A

3.3V ABT Octal Bus Transceiver

Maxwell Technologies
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