2000 Elantec Semiconductor, Inc.
EL
7155C
General Description
The EL7155C high-performance pin driver with tri-state is suited to
many ATE and level-shifting applications. The 3.5A peak drive capa-
bility makes this part an excellent choice when driving high
capacitance loads.
Output pins OUTH and OUTL are connected to input pins VH and VL
respectively, depending on the status of the IN pin. One of the output
pins is always in tri-state, except when the OE pin is active low, in
which case both outputs are in tri-state mode. The isolation of the out-
put FETs from the power supplies enables VH and VL to be set
independently, enabling level-shifting to be implemented.
This pin driver has improved performance over existing pin drivers. It
is specifically designed to operate at voltages down to 0V across the
switch elements while maintaining good speed and on-resistance
characteristics.
Available in the 8-Pin SOIC and 8-Pin PDIP packages, the EL7155C
is specified for operation over the -40C to +85C temperature range.
Pin Layout Diagram
1
2
3
4
8
7
6
5
8-Pin PDIP/SOIC
VH
L
o
g
i
c
OUTH
OUTL
VL
V
S
+
OE
IN
GND
Features
Clocking Speeds up to 40MHz
15ns tr/tf at 2000pF C
LOAD
0.5ns Rise and Fall Times
Mismatch
0.5ns T
ON
-T
OFF
Prop Delay
Mismatch
3.5pF Typical Input Capacitance
3.5A Peak Drive
Low on Resistance of 3.5
High Capacitive Drive Capability
Operates from 4.5V up to 18V
Applications
ATE/Burn-in Testers
Level Shifting
IGBT Drivers
CCD Drivers
Ordering Information
Part No.
Package
Tape & Reel
Outline #
EL7155CN
8-Pin DIP
-
MDP0031
EL7155CS
8-Pin SOIC
-
MDP0027
EL7155CS-T7
8-Pin SOIC
7"
MDP0027
EL7155CS-T13
8-Pin SOIC
13"
MDP0027
EL7155C
High-Performance Pin Driver
Septe
m
ber 5, 2000
2
EL7155C
High-Performance Pin Driver
E
L
7155C
Absolute Maximum Ratings
(T
A
= 25C)
Absolute maximum ratings are those values beyond which the device
could be permanently damaged. Absolute maximum ratings are stress
ratings only and functional device operation is not implied.
Supply Voltage (V
S
+ to VL)
+18V
Input Voltage
VL -0.3V, VL+ +0.3V
Continuous Output Current
200mA
Storage Temperature Range
-65C to +150C
Ambient operating Temperature
-40C to +85C
Operating Junction Temperature
125C
Power Dissipation
see curves
Maximum ESD
2kV
Important Note:
All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are at the
specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
.
Electrical Characteristics
V
S
+ = +15V, VH = +15V, VL = 0V, T
A
= 25C, unless otherwise specified.
Parameter
Description
Condition
Min
Typ
Max
Unit
Input
V
IH
Logic `1' Input Voltage
2.4
V
I
IH
Logic `1' Input Current
V
IH
= V
S
+
0.1
10
A
V
IL
Logic `0' Input Voltage
0.8
V
I
IL
Logic `0' Input Current
V
IL
= 0V
0.1
10
A
C
IN
Input Capacitance
3.5
pF
R
IN
Input Resistance
50
M
Output
R
OVH
ON Resistance VH to OUTH
I
OUT
= -200 mA
2.7
4.5
R
OVL
ON Resistance VL to OUTL
I
OUT
= +200 mA
3.5
5.5
I
OUT
Output Leakage Current
OE = 0V, OUTH = VL, OUTL = V
S
+
0.1
10
A
I
PK
Peak Output Current
(linear resistive operation)
Source
3.5
A
Sink
3.5
A
I
DC
Continuous Output Current
Source/Sink
200
mA
Power Supply
I
S
Power Supply Current
Inputs = V
S
+
1.3
3
mA
I
VH
Off Leakage at VH
VH = 0V
4
10
A
Switching Characteristics
t
R
Rise Time
C
L
=2000 pF
14.5
ns
t
F
Fall Time
C
L
= 2000 pF
15
ns
t
RFdelta
t
R
, t
F
Mismatch
C
L
= 2000 pF
0.5
ns
t
D-1
Turn-Off Delay Time
C
L
= 2000 pF
9.5
ns
t
D-2
Turn-On Delay Time
C
L
= 2000 pF
10
ns
t
Ddelta
t
D-1
-t
D-2
Mismatch
C
L
= 2000 pF
0.5
ns
t
D-3
Tri-State Delay Enable
10
ns
t
D-4
Tri-State Delay Disable
10
ns
3
EL7155C
High-Performance Pin Driver
EL
7155C
Electrical Characteristics
V
S
+ = +5V, VH = +5V, VL = -5V, T
A
= 25C, unless otherwise specified.
Parameter
Description
Condition
Min
Typ
Max
Unit
Input
V
IH
Logic `1' Input Voltage
2.0
V
I
IH
Logic `1' Input Current
V
IH
= V
S
+
0.1
10
A
V
IL
Logic `0' Input Voltage
0.8
V
I
IL
Logic `0' Input Current
V
IL
= 0V
0.1
10
A
C
IN
Input Capacitance
3.5
pF
R
IN
Input Resistance
50
M
Output
R
OVH
ON Resistance VH to OUTH
I
OUT
= -200 mA
3.4
5
R
OVL
ON Resistance VL to OUTL
I
OUT
= +200 mA
4
6
I
OUT
Output Leakage Current
OE = 0V, OUTH = VL, OUTL = V
S
+
0.1
10
A
I
PK
Peak Output Current
(linear resistive operation)
Source
3.5
A
Sink
3.5
A
I
DC
Continuous Output Current
Source/Sink
200
mA
Power Supply
I
S
Power Supply Current
Inputs = V
S
+
1
2.5
mA
I
VH
Off Leakage at VH
VH = 0V
4
10
A
Switching Characteristics
t
R
Rise Time
C
L
=2000 pF
17
ns
t
F
Fall Time
C
L
= 2000 pF
17
ns
t
RFdelta
t
R
, t
F
Mismatch
C
L
= 2000 pF
0
ns
t
D-1
Turn-Off Delay Time
C
L
= 2000 pF
11.5
ns
t
D-2
Turn-On Delay Time
C
L
= 2000 pF
12
ns
t
Ddelta
t
D-1
-t
D-2
Mismatch
C
L
= 2000 pF
0.5
ns
t
D-3
Tri-State Delay Enable
11
ns
t
D-4
Tri-State Delay Disable
11
ns
4
EL7155C
High-Performance Pin Driver
E
L
7155C
Typical Performance Curves
Input Threshold vs Supply Voltage
T=25C
1.2
I
nput
v
o
l
t
age
(V
)
Supply Voltage (V)
1.0
1.8
1.6
1.4
15
5
10
High Threshold
Hysteresis
Quiescent Supply Current vs Supply Voltage
T=25C
15
Su
p
p
ly
C
u
r
r
e
n
t
(
m
A)
Supply Voltage (V)
0
2.0
5
1.6
1.2
0.8
0.4
10
All Inputs = GND
All Inputs = V
S
+
"On" Resistance vs Supply Voltage
I
OUT
=200mA, T=25C, V
S
+=VH, VL=0V
Rise/Fall Time vs Supply Voltage
C
L
=2000pF, T=25C
15
20
R
i
se
/
F
a
l
l
T
i
m
e
(n
s)
Supply Voltage (V)
10
30
5
Rise/Fall Time vs Temperature
C
L
=2000pF, V
S
+=15V
150
14
R
i
se
/F
a
l
l
T
i
m
e
(
n
s)
Temperature (C)
10
100
20
-50
10
25
15
50
16
18
12
0
Low Threshold
t
F
t
R
t
R
t
I
t
R
t
F
"
On
"
Re
si
s
t
a
n
ce
(
)
Supply Voltage (V)
7.5
15
12.5
5
10
1
0
6
5
2
4
3
V
OUT
-VL
V
OUT
-VH
Max Power/Derating Curves
M
a
x
P
o
w
e
r
(W
)
Temperature (C)
25
100
75
0
50
200mW
1W
600mW
400mW
800mW
125
150
0
Max T
J
=125C
JA
=160C/W
8-Lead SO
8-Lead PDIP
JA
=100C/W
5
EL7155C
High-Performance Pin Driver
EL
7155C
Typical Performance Curves (cont.)
Propagation Delay vs Supply Voltage
C
L
=2000pF, T=25C
15
13
De
l
a
y T
i
m
e
(
n
s
)
Supply Voltage (V)
9
17
5
Propagation Delay vs Temperature
C
L
=2000pF, V
S
+=15V
De
l
a
y T
i
m
e
(
n
s
)
Temperature (C)
6
14
15
11
10
0
125
-50
50
12
8
-25
25
75
100
1M
10M
10k
100k
0.1
1.0
10
100
Supply Current vs Frequency
C
L
=1000pF, T=25C
Su
p
p
ly
C
u
r
r
e
n
t
(
m
A)
Frequency (Hz)
10
100
1000
10000
0
1
4
5
3
2
Rise/Fall Time vs Load Capacitance
V
S
+=+15V, T=25C
10000
30
R
i
s
e
/
F
a
ll Time
(
n
s
)
Load Capacitance (pF)
0
70
100
Supply Current vs Load Capacitance
V
S
+=VH=15V, VL=0V, T=25C, f=20kHz
Su
p
p
ly
C
u
r
r
e
n
t
(
m
A)
Load Capacitance (pF)
1000
60
50
40
20
10
t
D-2
t
D-1
t
D-2
t
D-1
t
F
t
R
V
S
+=15V
V
S
+=10V
V
S
+=5V
6
EL7155C
High-Performance Pin Driver
E
L
7155C
Truth Table
OE
IN
VH to OUTH
OUTL to VS-
0
0
Open
Open
0
1
Open
Open
1
0
Closed
Open
1
1
Open
Closed
Operating Voltage Range
PIN
MIN
MAX
GND - VL
-5
0
V
S
+ - VL
5
18
VH
- VL
0
18
V
S
+
- VH
0
18
V
S
+ - GND
5
18
Timing Diagrams
90%
t
D1
t
D2
t
F
10%
Inverted
Output
2.5V
5V
Input
0
t
R
Standard Test Configuration
1
2
3
4
8
7
6
5
EL7155C
VH
L
o
g
i
c
OUT
VL
V
S
+
OE
IN
GND
V
S
+
4.7
0.1
10k
-
0.1
4.7
0.1
4.7
2000p
7
EL7155C
High-Performance Pin Driver
EL
7155C
Pin Descriptions
Pin
Name
Function
Equivalent Circuit
1
V
S
+
Positive Supply Voltage
2
OE
Output Enable
3
IN
Input
Same as Circuit 1
4
GND
Ground
5
VL
Negative Supply Voltage
6
OUTL
Lower Switch Output
7
OUTH
Upper Switch Output
8
VH
Upper Output Voltage
Circuit 1
V
S
+
INPUT
VL
Circuit 2
OUTL
VL
V
S
+
Circuit 3
VH
OUTH
VL
V
S
+
VL
8
EL7155C
High-Performance Pin Driver
E
L
7155C
Block Diagram
Application Information
Product Description
The EL7155C is a high performance 40MHz pin driver.
It contains two analog switches connecting VH to
OUTH and VL to OUTL. Depending on the value of the
IN pin, one of the two switches will be closed and the
other switch open. An output enable (OE) is also sup-
plied which opens both switches simultaneously.
Due to the topology of the EL7155C, VL should always
be connected to a voltage equal to, or lower than GND.
VH can be connected to any voltage between VL and the
positive supply, V
S
+.
The EL7155C is available in both the 8-pin SOIC and
the 8-pin PDIP packages. The relevant package should
b e c h o se n de p en d i n g o n t h e c al cu l a t e d p ow er
dissipation.
Supply Voltage Range and Input Compatibility
The EL7155C is designed for operation on supplies from
5V to 15V (4.5V to 18V maximum). The table on page 6
shows the specifications for the relationship between the
V
S
+, VH, VL, and GND pins.
All input pins are compatible with both 3V and 5V
CMOS signals. With a positive supply (V
S
+) of 5V, the
EL7155C is also compatible with TTL inputs.
V
S
+
IN
OE
VL
3-State
Control
Level
Shifter
GND
VH
OUTH
OUTL
9
EL7155C
High-Performance Pin Driver
EL
7155C
Power Supply Bypassing
When using the EL7155C, it is very important to use
adequate power supply bypassing. The high switching
currents developed by the EL7155C necessitate the use
of a bypass capacitor between the V
S
+ and GND pins. It
is recommended that a 2.2F tantalum capacitor be used
in parallel with a 0.1 F low-inductance ceramic MLC
capacitor. These should be placed as close to the supply
pins as possible. It is also recommended that the VH and
VL pins have some level of bypassing, especially if the
EL7155C is driving highly capacitive loads.
Power Dissipation Calculation
When switching at high speeds, or driving heavy loads,
the EL7155C drive capability is limited by the rise in die
temperature brought about by internal power dissipation.
For reliable operation die temperature must be kept
below T
jmax
(125C). It is necessary to calculate the
power dissipation for a given application prior to select-
ing the package type.
Power dissipation may be calculated:
where:
V
S
is the total power supply to the EL7155C (from
V
S
+ to GND),
V
out
is the swing on the output (VH - VL),
C
L
is the load capacitance,
C
INT
is the internal load capacitance (50pF max.),
I
S
is the quiescent supply current (3mA max.) and
f is frequency
Having obtained the application's power dissipation, a
maximum package thermal coefficient may be deter-
mined, to maintain the internal die temperature below
T
jmax
:
where:
T
jmax
is the maximum junction temperature (125C),
T
max
is the maximum operating temperature,
PD is the power dissipation calculated above,
ja
thermal resistance on junction to ambient.
ja
is 160C/W for the SO8 package and 100C/W for
the PDIP8 package when using a standard JEDEC
JESD51-3 single-layer test board. If T
jmax
is greater than
125C when calculated using the equation above, then
one of the following actions must be taken:
Reduce
ja
the system by designing more heat-sinking
into the PCB (as compared to the standard JEDEC
JESD51-3)
Use the PDIP8 instead of the SO8 package
De-rate the application either by reducing the switch-
ing frequency, the capacitive load, or the maximum
operating (ambient) temperature (T
max
)
PD
V
S
(
I
S
)
C
INT
(
V
S
2
f
)
C
L
(
V
OU T
2
f
)
+
+
=
ja
T
jmax
(
T
ma x
)
PD
--------------------------------------
=
10
EL7155C
High-Performance Pin Driver
E
L
7155C
General Disclaimer
Specifications contained in this data sheet are in effect as of the publication date shown. Elantec, Inc. reserves the right to make changes in the cir-
cuitry or specifications contained herein at any time without notice. Elantec, Inc. assumes no responsibility for the use of any circuits described
herein and makes no representations that they are free from patent infringement.
WARNING - Life Support Policy
Elantec, Inc. products are not authorized for and should not be used
within Life Support Systems without the specific written consent of
Elantec, Inc. Life Support systems are equipment intended to sup-
port or sustain life and whose failure to perform when properly used
in accordance with instructions provided can be reasonably
expected to result in significant personal injury or death. Users con-
templating application of Elantec, Inc. Products in Life Support
Systems are requested to contact Elantec, Inc. factory headquarters
to establish suitable terms & conditions for these applications. Elan-
tec, Inc.'s warranty is limited to replacement of defective
components and does not cover injury to persons or property or
other consequential damages.
Elantec Semiconductor, Inc.
675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: (408) 945-1323
(888) ELANTEC
Fax:
(408) 945-9305
European Office: +44-118-977-6080
S
e
p
t
ember
5, 2000
Printed in U.S.A.
Japan Technical Center: +81-45-682-5820
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