Datasheet 54LVTH245ARPFS, 54LVTH245ARPFI, 54LVTH245ARPFE, 54LVTH245ARPFB Datasheet (MAXWELL)

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

[phone] - Fax: [phone] - 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

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)

P

PRELIMINARY

Supply Current I

Delta Supply Current

Input Capacitance C

Input Output Capacitance C

ARAMETER SYMBOL TEST CONDITIONS MIN MAX UNIT

VCC = 3.6V Outputs high -- 0.39 mA

CC

I

= 0 Outputs low -- 14

O

V

= VCC or GND Outputs disabled -- 0.39

I

1

∆I

V

CC

I

O

2

2

= 3V to 3.6V, One input at VCC -0.6V, Other inputs at

CC

V

or GND

CC

VI = 3V or 0 -- 8 pF

VO = 3V or 0 -- 15 pF

54LVTH245A

-- 0.2 mA

1. This is the increase in supply current for each input that is at the specified TTL voltage level rather than V

2. Guaranteed by design.

TABLE 6. 54LVTH245A AC ELECTRICAL CHARACTERISTICS

(VCC = 3.3V ±10%, TA = -55 RO 125°C, UNLESS OTHERWISE NOTED)

VCC = 3.3V ± 0.3V VCC = 2.7V

P

ARAMETER

SYMBOL

MIN MAX MIN MAX

Propagation Delay Time

A orB to B or A

Output Enable Time

OE

to A or B

Output Disable Time

OE

to A or B

t

t

t

t

t

t

PLH

PHL

PZH

PZL

PHZ

PLZ

0.7 3.7 -- 4.2 ns

0.7 3.7 -- 4.2

1.2 5.7 -- 7.4 ns

1.6 5.7 -- 6.8

1.8 6.2 -- 6.8 ns

1.8 5.3 -- 5.5

TABLE 7. FUNCTION TABLE

INPUTS OPERATION

or GND.

CC

Memory

U

NIT

1000597

OE

DIR

L L B data to A bus

l H A data to B bus

HXIsolation

12.19.01 Rev 1

All data sheets are subject to change without notice

4

©2001 Maxwell Technologies

All rights reserved.

3.3V ABT Octal Bus Transceiver

with 3-State Output

PRELIMINARY

Figure Note:

1. C

includes probe and jig capacitance.

L

PARAMETER MEASUREMENT INFORMATION

54LVTH245A

FIGURE 1. LOAD CIRCUIT

TEST S1

t

PLH/tPHL

t

PLZ/tPZL

t

PHZ/tPZH

Open

6V

GND

FIGURE 2. PULSE DURATION

FIGURE 3. SETUP AND HOLD TIMES

Memory

1000597

12.19.01 Rev 1

All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

5

3.3V ABT Octal Bus Transceiver

with 3-State Output

FIGURE 4. PROPAGATION DELAY TIMES INVERTING AND NONINVERTING OUTPUTS

PRELIMINARY

FIGURE 5. ENABLE AND DISABLE TIMES LOW- AND HIGH-LEVEL ENABLING

54LVTH245A

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.

3.3V ABT Octal Bus Transceiver

with 3-State Output

PRELIMINARY

54LVTH245A

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 --

N20

F20-01

Note: All dimensions in inches

1000597

12.19.01 Rev 1

All data sheets are subject to change without notice

©2001 Maxwell Technologies

All rights reserved.

7

3.3V ABT Octal Bus Transceiver

54LVTH245A

with 3-State Output

Important Notice:

These data sheets are created using the chip manufacturer’s published specifications. Maxwell Technologies verifies

PRELIMINARY

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

©2001 Maxwell Technologies

All rights reserved.

8

3.3V ABT Octal Bus Transceiver

)

with 3-State Output

Product Ordering Options

54LVTH245A

PRELIMINARY

54LVTH245A

Model Number

RP

F X

Feature

Screening Flow

Package

Option Details

Monolithic
S = Maxwell Class S
B = Maxwell Class B
E = Engineering (testing @ +25°C
I = Industrial (testing @ -55°C,
+25°C, +125°C)

Memory

F = Flat Pack

1000597

Radiation Feature

Base Product
Nomenclature

12.19.01 Rev 1

RP = R

AD-PAK® package

Octal Bus Transceiver with 3­State Output

All data sheets are subject to change without notice

9

©2001 Maxwell Technologies

All rights reserved.