İ 1998 Élantec, Inc.
EL
7457C
General Description
The EL7457C is an ultra-high speed, non-inverting quad CMOS
driver. It is capable of running at clock rates up to 40MHz and features
2A peak drive capability and a nominal on-resistance of just 3
. The
EL7457C is ideal for driving highly capacitive loads, such as storage
and vertical clocks in CCD applications. It is also well suited to ATE
pin driving, level-shifting and clock-driving applications.
The EL7457C is capable of running from single or dual power sup-
plies while using ground referenced inputs. Each output can be
switched to either the high (VH) or low (VL) supply pins, depending
on the related input pin. The inputs are compatible with both 3V and
5V CMOS and TTL logic. The output enable (OE) pin can be used to
put the outputs into a high-impedance state. This is especially useful in
CCD applications, where the driver should be disabled during power
down.
The EL7457C also features very fast rise and fall times which are
matched to within 1ns. The propagation delay is also matched between
rising and falling edges to within 2ns.
The EL7457C is available in both the 16-Pin QSOP and 16-Pin SOIC
packages. It is specified for operation over the -40°C to +85°C temper-
ature range.
Pin Layout Diagram
V
S
+
OUTB
OUTA
NC
OUTC
V
S
-
VH
INA
OE
VL
NC
IND
INC
OUTD
EL7457C
1
2
3
4
16
15
14
13
5
6
7
12
11
10
8
9
GND
INB
Features
· Clocking Speeds Up To 40MHz
· 4 Channels
· 12 ns tr/tf at 1000pF Cload
· 1ns Rise and Fall Time Mismatch
· 1.5ns Prop Delay Mismatch
· Low Quiescent Current, <1mA
· Fast Output Enable Function, 12ns
· Wide Output Voltage Range
· 8V >VL >-5V
· -2V < VH < 15V
· 2A Peak Drive
· 3
On Resistance
· Input Level Shifters
· TTL/CMOS Input Compatible
Applications
· CCD Drivers
· Digital Cameras
· Pin Drivers
· Clock / Line Drivers
· Ultrasound Transducer Drivers
· Ultrasonic and RF Generators
· Level Shifting
Ordering Information
Part No.
Temp. Range
Package
Outline #
EL7457CU
-40°C to +85°C
16-Pin QSOP
MDP0040
EL7457CS
-40°C to +85°C
16-Pin SO
MDP0027
EL7457C
40MHz Non-Inverting Quad CMOS Driver
D
ece
mber 7, 1999
2
EL7457C
40MHz Non-Inverting Quad CMOS Driver
E
L
7457C
Absolute Maximum Ratings
(T
A
= 25°C)
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 GND)
+16.5V
Input Voltage
GND -0.3V, V
S
+ +0.3V
Continuous Output Current
100mA
Storage Temperature Range
-65°C to +150°C
Ambient Operating Temperature
-40°C to +85°C
Operating Junction Temperature
125°C
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
+ = +5V, V
S
- = -5V, VH = +5V, VL = -5V, T
A
= 25°C, unless otherwise specified
Parameter
Description
Condition
Min
Typ
Max
Units
Input
V
IH
Logic "1" Input Voltage
2.0
V
I
IH
Logic "1" Input Current
V
IH
= 5V
0.1
10
µ A
V
IL
Logic "0" Input Voltage
0.8
V
I
IL
Logic "0" Input Current
V
IL
= 0V
0.1
10
µ A
C
in
Input Capacitance
3.5
pF
R
in
Input Resistance
50
M
Output
R
OV1
ON Resistance VH to OUTx
I
OUT
= -100mA
4.5
6
R
OV2
ON Resistance VL to OUTx
I
OUT
= +100mA
4
6
I
Leak
Output Leakage Current
VH = V
S
+, VL = V
S
-
0.1
10
µ A
I
PK
Peak Output Current
Source
2.0
A
Sink
2.0
A
Power Supply
I
S
Power Supply Current
Inputs = V
S
+
0.5
1.5
mA
Switching Characteristics
t
R
Rise Time
C
L
= 1000pF
13.5
ns
t
F
Fall Time
C
L
= 1000pF
13
ns
t
RFdelta
t
R
, t
F
Mismatch
C
L
= 1000pF
0.5
ns
t
D-1
Turn-Off Delay Time
C
L
= 1000pF
12.5
ns
t
D-2
Turn-On Delay Time
C
L
= 1000pF
14.5
ns
t
Ddelta
t
D-1
- T
D-2
Mismatch
C
L
= 1000pF
2
ns
T
enable
Enable Delay Time
12
ns
T
disable
Disable Delay Time
12
ns
3
EL7457C
40MHz Non-Inverting Quad CMOS Driver
EL
7457C
Electrical Characteristics
V
S
+ = +15V, V
S
- = 0V, VH = +15V, VL = 0V, T
A
= 25°C, unless otherwise specified
Parameter
Description
Condition
Min
Typ
Max
Units
Input
V
IH
Logic "1" Input Voltage
2.4
V
I
IH
Logic "1" Input Current
V
IH
= 5V
0.1
10
µ A
V
IL
Logic "0" Input Voltage
0.8
V
I
IL
Logic "0" Input Current
V
IL
= 0V
0.1
10
µ A
C
in
Input Capacitance
3.5
pF
R
in
Input Resistance
50
M
Output
R
OV1
ON Resistance VH to OUT
I
OUT
= -100mA
3.5
5
R
OV2
ON Resistance VL to OUT
I
OUT
= +100mA
3
5
I
leak
Output Leakage Current
VH = V
S
+, VL = V
S
-
0.1
10
µ A
I
PK
Peak Output Current
Source
2.0
A
Sink
2.0
A
Power Supply
I
S
Power Supply Current
Inputs = V
S
+
0.8
2
mA
Switching Characteristics
t
R
Rise Time
C
L
= 1000pF
11
ns
t
F
Fall Time
C
L
= 1000pF
12
ns
t
RFdelta
t
R
, t
F
Mismatch
C
L
= 1000pF
1
ns
t
D-1
Turn-Off Delay Time
C
L
= 1000pF
11.5
ns
t
D-2
Turn-On Delay Time
C
L
= 1000pF
13
ns
t
Ddelta
t
D-1
- t
D-2
Mismatch
C
L
= 1000pF
1.5
ns
T
enable
Enable Delay Time
12
ns
T
disable
Disable Delay Time
12
ns
4
EL7457C
40MHz Non-Inverting Quad CMOS Driver
E
L
7457C
Typical Performance Curves
Max Power
Ma
x
P
o
w
e
r
(
W
)
Temperature (°C)
11
25
100
75
0
50
0.2
0
1.0
0.6
0.4
0.8
ja
=110°C/W, SO-16
ja
=158°C/W, QSOP-16
Switch Threshold vs Supply Voltage
T=25°C
1.2
I
nput
v
o
l
t
age
(V
)
Supply Voltage (V)
10
1.0
1.8
1.6
1.4
7
15
12
5
10
High Limit = 2.4V
Low Limit = 0.8V
Hysteresis
Quiescent Supply Current vs Supply Voltage
T=25°C
8
15
0.6
S
uppl
y
C
u
rr
ent
(
m
A
)
Supply Voltage (V)
9
0
12
2.0
5
1.8
1.6
1.4
1.2
1.0
0.8
0.4
0.2
11
All Inputs = 0
All Inputs = V
S
+
"On" Resistance vs Supply Voltage
I
OUT
=100mA, T=25°C
15
3
"
On
"
Res
i
s
t
anc
e (
)
Supply Voltage (V)
8
2
9
5
8
7
6
5
4
10
t
R
t
F
Rise/Fall Time vs Supply Voltage
C
L
=1000pF, T=25°C
7.5
15
15
R
i
se
/
F
a
l
l
T
i
m
e
(n
s)
Supply Voltage (V)
1
5
12.5
25
5
Rise/Fall Time vs Temperature
C
L
=1000pF, V
S
+=15V
150
10
Ri
se
/F
a
l
l
T
i
m
e
(
n
s)
Temperature (°C)
2
6
100
16
-50
10
20
10
50
12
14
8
t
F
t
R
0
VH to OUT
VL to OUT
5
EL7457C
40MHz Non-Inverting Quad CMOS Driver
EL
7457C
Typical Performance Curves (cont.)
100
1k
10k
0
2
8
10
12
6
4
Propagation Delay vs Supply Voltage
C
L
=1000pF, T=25°C
7.5
15.0
15
De
l
a
y T
i
m
e
(
n
s)
Supply Voltage (V)
3
5
25
5.0
Propagation ,Delay vs Temperature
C
L
=1000pF, V
S
+=15V
12
De
l
a
y T
i
m
e
(
n
s)
Temperature (°C)
4
6
18
Rise/Fall Time vs Load
V
S
+=15V, T=25°C
470
10000
60
R
i
se
/
F
a
l
l
T
i
m
e
(n
s)
Load Capacitance (pF)
5
0
2200
140
100
Supply Current Per Channel vs Capacitive Load
V
S
+=VH=10V, V
S
-=VL=0V, T=25°C, f=100kHz
S
u
ppl
y
Cu
rre
nt
(m
A
)
Load Capacitance (pF)
6
20
10
10.0
12.5
0
125
-50
50
14
16
10
8
1000
4700
120
100
80
40
20
t
D2
t
D1
-25
25
75
100
1M
10M
10k
100k
0.1
1.0
10
100
Supply Current Per Channel vs Frequency
C
L
=1000pF, T=25°C
S
upp
l
y
Cur
r
ent
(m
A
)
Frequency (Hz)
7
V
S
+=15V
V
S
+=10V
V
S
+=5V
t
F
t
R
t
D2
t
D1
6
EL7457C
40MHz Non-Inverting Quad CMOS Driver
E
L
7457C
Nominal Operating Voltage Range
PIN
MIN
MAX
V
S
+ to V
S
-
5V
15V
V
S
- to GND
-5V
0V
VH
V
S
- + 2.5V
V
S
+
VL
V
S
-
V
S
+
VH to VL
0V
15V
VL to V
S
-
0V
8V
90%
t
D1
t
D2
t
F
10%
Output
2.5V
5V
Input
t
R
0
Timing Diagrams
7
EL7457C
40MHz Non-Inverting Quad CMOS Driver
EL
7457C
Standard Test Configuration
4.7µ F
0.1µ F
4.7µ F
0.1µ F
VS+
INA
1000pF
VH
OUTB
10k
INB
NC
INC
IND
0.1µ F
VL
EN
1000pF
1000pF
1000pF
0.1µ F
OUTC
OUTD
OUTA
1
2
3
4
16
15
14
13
5
6
7
12
11
10
8
9
NC
V
S
+
4.7µ F
V
S
-
4.7µ F
8
EL7457C
40MHz Non-Inverting Quad CMOS Driver
E
L
7457C
Pin Description
Pin
Name
Function
Equivalent Circuit
1
INA
Input Channel A
2
OE
Output Enable
(Reference Circuit 1)
3
INB
Input Channel B
(Reference Circuit 1)
4
VL
Low Voltage Input Pin
5
GND
Input Logic Ground
6
NC
No Connection
7
INC
Input Channel C
(Reference Circuit 1)
8
IND
Input Channel D
(Reference Circuit 1)
9
V
S
-
Negative Supply Voltage
10
OUTD
Output Channel D
11
OUTC
Output Channel C
(Reference Circuit 2)
12
VH
High Voltage Input Pin
13
NC
No Connection
14
OUTB
Output Channel B
(Reference Circuit 2)
15
OUTA
Output Channel A
(Reference Circuit 2)
16
V
S
+
Positive Supply Voltage
V
S
+
V
S
-
INPUT
Circuit 1
VH
OUTPUT
VL
Circuit 2
V
S
-
9
EL7457C
40MHz Non-Inverting Quad CMOS Driver
EL
7457C
Block Diagram
V
S
+
INPUT
OE
V
S
-
3-State
Control
VH
OUTPUT
VL
Level
Shifter
GND
10
EL7457C
40MHz Non-Inverting Quad CMOS Driver
E
L
7457C
Application Information:
Product Description
The EL7457C is a high performance 40MHz ultra-high
speed quad driver. Each channel of the EL7457C con-
sists of a single P-channel high side driver and a single
N-channel low side driver. These 3
devices will pull
the output (OUT
X
) to either the high or low voltage, on
VH and VL respectively, depending on the input logic
signal (IN
X
). It should be noted that there is only one set
of high and low voltage pins.
A common output enable (OE) pin is available on the
EL7457C. This pin, when pulled low will put all outputs
in to the high impedance state.
The EL7457C is available in both the 16-pin SOIC and
the space saving 16-pin QSOP packages. The relevant
package should be chosen depending on the calculated
power dissipation.
Supply Voltage Range and Input Compatibility
The EL7457C is designed for operation on supplies from
5V to 15V with 10% tolerance (i.e. 4.5V to 16.5V). The
table on page 6 shows the specifications for the relation-
ship between the V
S
+, V
S
-, VH, VL and GND pins. The
EL7457C does not contain a true analog switch and
therefore VL should always be less than VH.
All input pins are compatible with both 3V and 5V
CMOS signals With a positive supply (V
S
+) of 5V, the
EL7457C is also compatible with TTL inputs.
Power Supply Bypassing
When using the EL7457C, it is very important to use
adequate power supply bypassing. The high switching
currents developed by the EL7457C necessitate the use
of a bypass capacitor on both the positive and negative
supplies. It is recommended that a 4.7µ F tantalum
capacitor be used in parallel with a 0.1µ F low-induc-
tance ceramic MLC capacitor. These should be placed as
close to the supply pins as possible. It is also recom-
mended that the VH and VL pins have some level of
bypassing, especially if the EL7457C is driving highly
capacitive loads.
Power Dissipation Calculation
When switching at high speeds, or driving heavy loads,
the EL7457C 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
(125°C). 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 EL7457C (from
V
S
+ to V
S
-),
· 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 (125°C),
· T
max
is the maximum operating temperature,
· PD is the power dissipation calculated above.
Using the value of
ja,
a suitable package for the applica-
tion may be selected.
In applications with a
ja
greater than 158°C/W, a 16-pin
QSOP may be used. A 16-pin SOIC is suitable for appli-
cations with a
ja
value greater than 110°C/W. However,
PD
V
S
I
S
×
(
)
C
INT
V
S
2
×
f
×
(
)
C
L
V
O UT
2
×
f
×
(
)
+
1
4
+
=
ja
T
jmax
T
max
(
)
PD
----------------------------------------
=
11
EL7457C
40MHz Non-Inverting Quad CMOS Driver
EL
7457C
if the calculated value of
ja
is less than 110°C/W, the
application must be derated to prevent premature failure
of the device, either by reducing the switching fre-
quency, the capacitive load or the maximum operating
temperature.
12
EL7457C
40MHz Non-Inverting Quad CMOS Driver
E
L
7457C
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.
Élantec, Inc.
675 Trade Zone Blvd.
Milpitas, CA 95035
Telephone: (408) 945-1323
(888) ÉLANTEC
Fax:
(408) 945-9305
European Office: +44-118-977-6080
Dec
e
mber
7, 1999
Printed in U.S.A.
PDF 
ZIP