54BCT244 - Buffer/Driver, 8 Bit

54BCT244
Octal Buffers/Drivers
Memory
Logic Diagram
FEATURES:
DESCRIPTION:
• 3-state outputs drive bus lines or buffer memory address
registers
• RAD-PAK® radiation-hardened against natural space radiation
• Total dose hardness:
- >100 krad (Si), depending upon space mission
• Package:
- 20-pin RAD-PAK® flat package
• Operating temperature range:
-55 to 125°C
• P-N-P inputs reduce DC loading
• Typical VOLP (output ground bounce)
- < 0.8 V at VCC=3.3 V, TA=25°C
• ESD protection exceeds 2000 V
Maxwell Technologies’ 54BCT244 octal buffers and line drivers features a greater than 100 krad (Si) total dose tolerance;
depending upon space misssion. The 54BCT244 is organized
as two 4-bit drivers with separate output enable (OE) inputs.
When OE is low, the device passes data from the A inputs to
the Y outputs. When OE is high, the outputs are in the high
impedance state.
1000608
(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 a space
mission. In a GEO orbit, RAD-PAK provides true greater than
100 krad (Si) total radiation dose tolerance, dependent upon
space mission. This product is available with packaging and
screening up to Class S.
12.19.01 Rev 5
All data sheets are subject to change without notice
1
©2001 Maxwell Technologies
All rights reserved.
54BCT244
Octal Buffers/Drivers
TABLE 1. PINOUT DESCRIPTION
PIN
SYMBOL
DESCRIPTION
1, 19
1OE-2OE
Output Enables
2, 4, 6, 8
1A1-1A4
Input
3, 5, 7, 9
2Y4-2Y1
Output
10
GND
Ground
11, 13, 15, 17
2A1-2A4
Input
12, 14, 16, 18
1Y4-1Y1
Output
20
VCC
Power Supply
TABLE 2. 54BCT244 ABSOLUTE MAXIMUM RATINGS 1
MIN
MAX
UNIT
Supply Voltage Range
VCC
-0.5
7.0
V
Input Voltage Range2
VI
-0.5
7.0
V
Voltage Range Applied to any Output in the Disable or Power-Off
State2
VO
-0.5
5.5
V
Voltage Range Applied to any Output in High State2
VO
-0.5
VCC
V
Current Into Any Output in the Low State
IO
--
96
mA
Total Power Dissipation @ TA = +55 °C 3
PD
--
651
mW
Operating Temperature Range
TA
-55
125
°C
Storage Temperature Range
TS
-65
150
°C
Memory
SYMBOL
PARAMETER
1. Stresses above the absolute maximum rating may cause permanent damage to the device. Extended operation at the maximum levels may degrade performance and affect reliability.
2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
3. Must be able to withstand the additional PD due to short circuit test, e.g. IDS. The PD number is based upon dc values.
TABLE 3. DELTA LIMITS
1000608
PARAMETER
VARIATION
ICC(OP)
±10% of specified value on Table 5
IOZH
±10% of specified value on Table 5
IOZL
±10% of specified value on Table 5
12.19.01 Rev 5
All data sheets are subject to change without notice
2
©2001 Maxwell Technologies
All rights reserved.
54BCT244
Octal Buffers/Drivers
TABLE 4. 54BCT244 RECOMMENDED OPERATING CONDITIONS1
PARAMETER
SYMBOL
MIN
MAX
UNIT
Supply Voltage
VCC
4.5
5.5
V
High-Level Input Voltage
VIH
2.0
--
V
Low-Level Input Voltage
VIL
--
0.8
V
High-Level Output Current
IOH
--
-12
mA
Low-Level Output Current
IOL
--
48
mA
Input Clamp Current
IIK
--
-18
mA
ΘJC
--
5.56
°C/W
TA
-55
125
°C
Thermal Impedance — Flat Package
Operating Temperature
1. All unused control inputs must be held high or low to ensure proper device operation.
TABLE 5. 54BCT244 DC ELECTRICAL CHARACTERISTICS
PARAMETER
SYMBOL
Input Clamp Voltage
VIK
High-Level Output Voltage
Low-Level Output Voltage
TEST CONDITIONS
VCC = 4.5 V
MIN
MAX
UNIT
--
-1.2
V
IOH = -3 mA
2.4
--
V
IOH = -12 mA
2
--
--
0.55
V
II = -18 mA
VOH
VCC = 4.5 V
VOL
VCC = 4.5 V
IOL = 48 mA
II
VCC = 5.5 V
VI = 7 V
0.1
mA
Off-State Output Current High-Level Voltage Applied
IOZH
VCC = 5.5 V
VI = 2.7 V
--
50
µA
Off-State Output Current Low-Level Voltage Applied
IOZL
VCC = 5.5 V
VO = 0.5 V
--
-50
µA
High Level Input Current
IIH1
VCC = 5.5 V
VI = 7 V
--
0.1
mA
IIH2
VCC = 5.5 V
VI = 2.7 V
--
20
µA
Input Current
IIL
VCC = 5.5 V
VI = 0.5 V
--
-1.0
mA
1
IOS
VCC = 5.5 V
VO = 0.0 V
-100
-225
mA
Supply Current, Outputs High
ICCH
VCC = 5.5 V
Outputs Open
--
40
mA
Supply Current, Outputs Low
ICCL
VCC = 5.5 V
Outputs Open
--
80
mA
Supply Current, Outputs Disabled to High
Impedance State
ICCZ
VCC = 5.5 V
Outputs Open
--
10
mA
Low Level Input Current
Short-circuit Output Current
Memory
(VCC = 5V ±10%, TA = -55 °C TO 125 °C, UNLESS OTHERWISE SPECIFIED)
1. Not more than one output should be shorted at one time and the duration of test shall not exceed one second.
1000608
12.19.01 Rev 5
All data sheets are subject to change without notice
3
©2001 Maxwell Technologies
All rights reserved.
54BCT244
Octal Buffers/Drivers
TABLE 6. 54BCT244 AC ELECTRICAL CHARACTERISTICS
(VCC = 5V ±10%, TA = -55 °C TO 125 °C, UNLESS OTHERWISE SPECIFIED)
PARAMETER
Propagation Delay Time
An to Yn
Output Enable Time
OE to Yn
TEST CONDITIONS
MIN
MAX
UNIT
tPLH
VCC = 4.5 to 5.5 V CL = 50 pF
R1 = 500 Ω R2 = 500 Ω
0.9
5.3
ns
tPHL
TA = -55 to +125 °C
1.4
6
tPLH
VCC = 5.0 V
CL = 50 pF
R1 = 500 Ω R2 = 500 Ω
1.2
4.4
tPHL
TA = +25 °C
1.7
5
tPZH
VCC = 4.5 to 5.5 V CL = 50 pF
R1 = 500 Ω R2 = 500 Ω
2
9
tPZL
TA = -55 to +125 °C
2
9.4
tPZH
VCC = 5.0 V CL = 50 pF
R1 = 500 Ω R2 = 500 Ω
2
7.8
tPZL
TA= +25 °C
2
8.1
tPHZ
VCC = 4.5 to 5.5 V CL = 50 pF
R1 = 500 Ω R2 = 500 Ω
2
8
tPLZ
TA = -55 to +125 °C
2
9.8
tPHZ
VCC = 5.0 V CL = 50 pF
R1 = 500 Ω R2 = 500 Ω
2
6.7
tPLZ
TA= +25 °C
2
7.6
ns
Memory
Output Disable Time
OE to Yn
SYMBOL
ns
TABLE 7. FUNCTION TABLE
(EACH BUFFER)
INPUTS
1000608
OUTPUT
OE
A
Y
l
H
H
L
L
L
H
X
Z
12.19.01 Rev 5
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4
©2001 Maxwell Technologies
All rights reserved.
54BCT244
Octal Buffers/Drivers
FIGURE 1. LOAD CIRCUIT FOR OUTPUTS
FIGURE NOTE:
1. CL INCLUDES PROBE AND JOG CAPACITANCE
PARAMETER MEASUREMENT INFORMATION
S1
TPLH/TPHL
Open
TPLZ/TPZL
6V
TPHZ/TPZH
GND
Memory
TEST
FIGURE 2. VOLTAGE WAVEFORMS PULSE DURATION
FIGURE 3. OUTPUT ENABLE TIMING
1000608
12.19.01 Rev 5
All data sheets are subject to change without notice
5
©2001 Maxwell Technologies
All rights reserved.
54BCT244
Octal Buffers/Drivers
FIGURE 4. VOLTAGE SETUP AND HOLD TIMES
FIGURE 5. PROPAGATION DELAY TIMES INVERTING AND NON-INVERTING OUTPUTS
Memory
Figure Notes:
2. All input pulses are supplied by generators having the following characteristics: PRR < 10 MHz, ZO = 50Ω, tr < 2.5 ns, tf < 2.5
ns.
3. 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.
4.The outputs are measured one at a time with one transition per measurement.
1000608
12.19.01 Rev 5
All data sheets are subject to change without notice
6
©2001 Maxwell Technologies
All rights reserved.
54BCT244
Octal Buffers/Drivers
Memory
20 PIN RAD-PAK® FLAT PACKAGE
DIMENSION
SYMBOL
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
0.050BSC
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
1000608
12.19.01 Rev 5
All data sheets are subject to change without notice
7
©2001 Maxwell Technologies
All rights reserved.
54BCT244
Octal Buffers/Drivers
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
1000608
12.19.01 Rev 5
All data sheets are subject to change without notice
8
©2001 Maxwell Technologies
All rights reserved.
54BCT244
Octal Buffers/Drivers
Product Ordering Options
Model Number
54BCT244
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 Buffers/Drivers
12.19.01 Rev 5
All data sheets are subject to change without notice
Memory
1000608
RP
9
©2001 Maxwell Technologies
All rights reserved.
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