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PDF 54LVTH162245 Data sheet ( Hoja de datos )
| Número de pieza | 54LVTH162245 | |
| Descripción | 16-Bit Bus Transceivers | |
| Fabricantes | Maxwell Technologies | |
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54LVTH162245
16-Bit Bus Transceivers with
3-State Outputs
/
/
/
/
Logic Diagram
FEATURES:
• A-Port outputs have equivalent 22-Ω series resistors, so
no external resistors are required
• Support mixed-mode signal operation (5V input and output
voltages with 3.3V VCC)
• Support unregulated battery operation down to 2.7V
• Typical VOLP (output ground bounce) < 0.8V at VCC = 3.3V,
TA = 25°C
• IOFF and power-up 3-state support hot insertion
• Bus hold on data inputs eliminates the need for external
pullup/pulldown resistors
• Distributed VCC and GND pin configuration minimizes high-
speed switching noise
• Flow-through architecture optimizes PCB layout
• Total dose hardness:
- > 100 krad (Si), depending upon space mission
• Package: 48 pin RAD-PAK® flat pack
DESCRIPTION:
Maxwell Technologies’ 54LVTH162245 devices are 16-bit
(dual-octal) non-inverting 3-state transceivers designed for
low-voltage (3.3V) VCC operation, but with the capability to
provide a TTL interface to a 5V system environment. These
devices can be used as two 8-bit transceivers or one 16-bit
transceiver. The devices allow data transmission from the A
bus to the B bus or form the B bus to the A bus, depending on
the logic level at the direction-control (DIR) input. The output
enable (OE) input can be used to disable the device so that
the buses are effectively isolated. The A-port outputs, which
are designed to source or sink up to 12 mA, include equivalent
22-Ω series resistors to reduce overshoot and undershoot.
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.
11.15.02 Rev 2
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
All data sheets are subject to change without notice 1
©2002 Maxwell Technologies
All rights reserved.
1 page  
16-Bit Bus Transceivers with 3-State Outputs
54LVTH162245
PARAMETER
TABLE 6. 54LVTH162245 AC ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±10%, TA = -55 TO +125 °C, UNLESS OTHERWISE SPECIFIED)
SYMBOL
SUBGROUPS
VCC = 3.3V ± 0.3
MIN MAX
VCC = 2.7V
MIN MAX
Propagation Delay Time
tPLH
9, 10, 11
1
3.5
--
4
A to B
tPHL 9, 10, 11
1
3.5
--
3.9
Propagation Delay Time
tPLH
9, 10, 11
1
4.3
--
5.3
B to A
tPHL 9, 10, 11
1
4.2
--
4.5
Output Enable Time
tPZH 9, 10, 11
1
4.8
--
5.9
OE to B
tPZL 9, 10, 11
1
4.8
--
5.5
Output Enable Time
tPZH 9, 10, 11
1
5.5
--
7.2
OE to A
tPZL 9, 10, 11
1
5.4
--
6.4
Output Disable Time
tPHZ 9, 10, 11
1
5.5
--
5.8
OE to B
tPLZ 9, 10, 11
1
5.5
--
5.8
Output Disable Time
tPHZ 9, 10, 11
1
5.8
--
6.5
OE to A
tPLZ 9, 10, 11
1
6.3
--
6.3
Output Skew
tsk(o) 9, 10, 11
--
--
--
--
TABLE 7. FUNTION TABLE
(EACH 8-BIT SECTION)
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
ns
ns
ns
ns
11.15.02 Rev 2
All data sheets are subject to change without notice 5
©2002 Maxwell Technologies
All rights reserved.
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet 54LVTH162245.PDF ] | |
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