54LVTH245A - Transceiver, 8 Bit, 3.3V

PRELIMINARY
54LVTH245A
3.3V ABT Octal Bus Transceiver
with 3-State Output
Memory
Logic Diagram (Positive Logic)
FEATURES:
DESCRIPTION:
• 3.3V ABT octal bus transceiver with 3-state outputs
• RAD-PAK® radiation hardened against natural space radiation
• 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 standard
• Supports live insertion
• Bus-hold data inputs eliminate the need for external pullup
resistors
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 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) 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.
1000597
(858) 503-3300 - Fax: (858) 503-3301 - www.maxwell.com
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 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.
12.19.01 Rev 1
All data sheets are subject to change without notice
1
©2001 Maxwell Technologies
All rights reserved.
PRELIMINARY
54LVTH245A
3.3V ABT Octal Bus Transceiver
with 3-State Output
TABLE 1. PINOUT DESCRIPTION
PIN
SYMBOL
DESCRIPTION
1
DIR
DirectionControl
2-9
A1-A8
Inputs
10
GND
Ground
11-18
B8-B1
Outputs
19
OE
Output Enable
20
VCC
Supply Voltage
TABLE 2. 54LVT245 ABSOLUTE MAXIMUM RATINGS 1
MIN
MAX
UNIT
VCC
-0.5
4.6
V
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 High State 3
IO
--
48
mA
Input Clamp Current (VI < 0)
IIK
--
-50
mA
IOK
--
-50
mA
PD
--
1.6
mW
Operating Temperature
TA
-55
125
°C
Storage Temperature Range
TS
-65
150
°C
Supply Voltage Range
Input Voltage Range
2
Output Clamp Current (VO < 0)
Maximum Power Dissipation at TA =
55°C
Memory
SYMBOL
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 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.
TABLE 3. DELTA LIMITS
1000597
PARAMETER
VARIATION
ICC(OL)
±10% of specified value in Table 5
ICC(OH)
±10% of specified value in Table 5
ICC(OD)
±10% of specified value in Table 5
12.19.01 Rev 1
All data sheets are subject to change without notice
2
©2001 Maxwell Technologies
All rights reserved.
PRELIMINARY
54LVTH245A
3.3V ABT Octal Bus Transceiver
with 3-State Output
TABLE 4. 54LVTH245A RECOMMENDED OPERATING CONDITIONS 1
SYMBOL
MIN
MAX
UNIT
Supply Voltage
VCC
2.7
3.6
V
High-level Input Voltage
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
PARAMETER
Input Transition Rise or Fall Rate
Outputs
enabled
Operating Temperature
1. Unused control inputs must be held high or low to prevent them from floating.
Memory
TABLE 5. 54LVTH245A ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±10%, TA = -55 to +125°C, UNLESS OTHERWISE SPECIFIED)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
MAX
UNIT
II = -18mA
--
-1.2
V
IOH = -100µA
VCC -0.2
--
V
VCC = 2.7V
IOH = -8mA
2.4
--
VCC = 3V,
IOH = -24mA
2.0
--
VCC = 2.7V
IOL = 100µA
--
0.2
IOL = 24mA
--
0.5
IOL = 16mA
--
0.4
IOL = 32mA
--
0.5
IOL = 48mA
--
0.55
--
±1
--
10
--
20
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
Input Current
II
VCC = 3.6V
VI = VCC or GND
VCC = 0 or 3.6V
VI = 5.5V
VCC = 3.6V
VI = 5.5V
Control inputs
A or B Ports
VI = VCC
II(HOLD) VCC = 3V
Power Up Current
Power Down Current
1000597
VI = 0.8V
µA
1
VI = 0
Hold Current
V
A or B Ports
--
-5
75
--
µA
VI = 2V
-75
--
IOZPU
2
VCC = 0 to 1.5V, VO = 0.5V to 3V, OE = don’t care
--
±100
µA
IOZPD
2
VCC = 1.5V to 0, VO = 0.5V to 3V, OE = don’t care
--
±100
µA
12.19.01 Rev 1
All data sheets are subject to change without notice
3
©2001 Maxwell Technologies
All rights reserved.
PRELIMINARY
54LVTH245A
3.3V ABT Octal Bus Transceiver
with 3-State Output
TABLE 5. 54LVTH245A ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±10%, TA = -55 to +125°C, UNLESS OTHERWISE SPECIFIED)
PARAMETER
SYMBOL
Supply Current
ICC
TEST CONDITIONS
MAX
UNIT
mA
VCC = 3.6V
Outputs high
--
0.39
IO = 0
Outputs low
--
14
Outputs disabled
--
0.39
∆ICC 1 VCC = 3V to 3.6V, One input at VCC -0.6V, Other inputs at
--
0.2
mA
VI = VCC or GND
Delta Supply Current
MIN
VCC or GND
Input Capacitance
CI2
VI = 3V or 0
--
8
pF
Input Output Capacitance
CO 2
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.
Memory
TABLE 6. 54LVTH245A AC ELECTRICAL CHARACTERISTICS
(VCC = 3.3V ±10%, TA = -55 RO 125°C, UNLESS OTHERWISE NOTED)
PARAMETER
VCC = 3.3V ± 0.3V
SYMBOL
VCC = 2.7V
UNIT
MIN
MAX
MIN
MAX
Propagation Delay Time
A orB to B or A
tPLH
0.7
3.7
--
4.2
tPHL
0.7
3.7
--
4.2
Output Enable Time
OE to A or B
tPZH
1.2
5.7
--
7.4
tPZL
1.6
5.7
--
6.8
Output Disable Time
OE to A or B
tPHZ
1.8
6.2
--
6.8
tPLZ
1.8
5.3
--
5.5
ns
ns
ns
TABLE 7. FUNCTION TABLE
INPUTS
1000597
OPERATION
OE
DIR
L
L
B data to A bus
l
H
A data to B bus
H
X
Isolation
12.19.01 Rev 1
All data sheets are subject to change without notice
4
©2001 Maxwell Technologies
All rights reserved.
PRELIMINARY
54LVTH245A
3.3V ABT Octal Bus Transceiver
with 3-State Output
FIGURE 1. LOAD CIRCUIT
Figure Note:
1. CL includes probe and jig capacitance.
PARAMETER MEASUREMENT INFORMATION
S1
tPLH/tPHL
Open
tPLZ/tPZL
6V
tPHZ/tPZH
GND
Memory
TEST
FIGURE 2. PULSE DURATION
FIGURE 3. SETUP AND HOLD TIMES
1000597
12.19.01 Rev 1
All data sheets are subject to change without notice
5
©2001 Maxwell Technologies
All rights reserved.
PRELIMINARY
3.3V ABT Octal Bus Transceiver
with 3-State Output
54LVTH245A
FIGURE 4. PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS
FIGURE 5. ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING
Memory
Figure Note:
2. 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.
1000597
12.19.01 Rev 1
All data sheets are subject to change without notice
6
©2001 Maxwell Technologies
All rights reserved.
PRELIMINARY
54LVTH245A
3.3V ABT Octal Bus Transceiver
with 3-State Output
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
F20-01
Note: All dimensions in inches
1000597
12.19.01 Rev 1
All data sheets are subject to change without notice
7
©2001 Maxwell Technologies
All rights reserved.
PRELIMINARY
3.3V ABT Octal Bus Transceiver
with 3-State Output
54LVTH245A
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
1000597
12.19.01 Rev 1
All data sheets are subject to change without notice
8
©2001 Maxwell Technologies
All rights reserved.
PRELIMINARY
54LVTH245A
3.3V ABT Octal Bus Transceiver
with 3-State Output
Product Ordering Options
Model Number
54LVTH245A
F
X
Option Details
Feature
Screening Flow
Monolithic
S = Maxwell Class S
B = Maxwell Class B
E = Engineering (testing @ +25°C)
I = Industrial (testing @ -55°C,
+25°C, +125°C)
Package
F = Flat Pack
Radiation Feature
RP = RAD-PAK® package
Base Product
Nomenclature
Octal Bus Transceiver with 3State Output
12.19.01 Rev 1
All data sheets are subject to change without notice
Memory
1000597
RP
9
©2001 Maxwell Technologies
All rights reserved.
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