Datasheet EL7457CU, EL7457CS Datasheet (ELANT)

EL7457C

40MHz Non-Inverting Quad CMOS Driver

EL7457C

Features

• Clocking Speeds Up To 40MHz

• 4 Channels

• 12 ns tr/tf at 1000 pF 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

• 3Ω 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

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 3Ω. 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-s h iftin g and clock-driving ap pl ic ations.

The EL7457C is capable of running from si ngle or dual power su p­plies 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 logi c. The outp ut en ab le (OE) pin can b e u sed 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 pro pagation de lay is also match ed 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 temper­ature rang e.

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

© 1998 Élantec, Inc.

Pin Layout Diagram

INA

1

OE

2

3

INB

VL

4

5

GND

NC

6

INC OUTD

7

IND

8 9

EL7457C

VS+

16

OUTA

15

OUTB

14

NC

13

VH

12

OUTC

11

10

VS-

December 7, 1999

EL7457C

40MHz Non-Inverting Quad CMOS Driver

EL7457C

Absolute Maximum Ratings (T

Absolute maximum ratings are those values b eyond whic h the device
could be permanently damaged. Absolute maximum ratings are stress
ratings only and functional device operation is not implied.

Supply Voltage (V
Input Voltage GND -0.3V, V

+ to GND) +16.5V

S

= 25°C)

A

+ +0.3V

S

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

= TC = TA.

J

Electrical Characteristics

VS+ = +5V, VS- = -5V, VH = +5V, VL = -5V, TA = 25°C, unless otherwise specified

Parameter Description Condition Min Typ Max Units

Input

V

IH

I

IH

V

IL

I

IL

C

in

R

in

Output

R

OV1

R

OV2

I

Leak

I

PK

Power Supply

I

S

Switching Characteristics

t

R

t

F

t

RFdelta

t

D-1

t

D-2

t

Ddelta

T

enable

T

disable

Logic “1” Input Voltage 2.0 V Logic “1” Input Current VIH = 5V 0.1 10 µA Logic “0” Input Voltage 0.8 V Logic “0” Input Current VIL = 0V 0.1 10 µA

Input Capacitance 3.5 pF

Input Resistance 50 MΩ

ON Resistance VH to OUTx I ON Resistance VL to OUTx I

= -100mA 4.5 6 Ω

OUT

= +100mA 4 6 Ω

OUT

Output Leakage Current VH = VS+, VL = VS-0.110µA

Peak Output Current Source 2.0 A

Sink 2.0 A

Power Supply Current Inputs = VS+ 0.5 1.5 mA

Rise Time CL = 1000pF 13.5 ns

Fall Time CL = 1000pF 13 ns

tR, tF Mismatch CL = 1000pF 0.5 ns Turn-Off Delay Time CL = 1000pF 12.5 ns Turn-On Delay Time CL = 1000pF 14.5 ns t

- T

Mismatch CL = 1000pF 2 ns

D-1

D-2

Enable Delay Time 12 ns Disable Delay Time 12 ns

2

EL7457C

40MHz Non-Inverting Quad CMOS Driver

Electrical Characteristics

VS+ = +15V, VS- = 0V, VH = +15V, VL = 0V , TA = 25°C, unless otherwise specified

Parameter Description Condition Min Typ Max Units

Input

V

IH

I

IH

V

IL

I

IL

C

in

R

in

Output

R

OV1

R

OV2

I

leak

I

PK

Power Supply

I

S

Switching Characteristics

t

R

t

F

t

RFdelta

t

D-1

t

D-2

t

Ddelta

T

enable

T

disable

Logic “1” Input Voltage 2.4 V Logic “1” Input Current VIH = 5V 0.1 10 µA Logic “0” Input Voltage 0.8 V Logic “0” Input Current VIL = 0V 0.1 10 µA

Input Capacitance 3.5 pF

Input Resistance 50 MΩ

ON Resistance VH to OUT I ON Resistance VL to OUT I

= -100mA 3.5 5 Ω

OUT

= +100mA 3 5 Ω

OUT

Output Leakage Current VH = VS+, VL = VS-0.110µA

Peak Output Current Source 2.0 A

Sink 2.0 A

Power Supply Current Inputs = VS+0.82mA

Rise Time CL = 1000pF 11 ns

Fall Time CL = 1000pF 12 ns

tR, tF Mismatch CL = 1000pF 1 ns

Turn-Off Delay Time CL = 1000pF 11.5 ns

Turn-On Delay Time CL = 1000pF 13 ns

t

- t

Mismatch CL = 1000pF 1.5 ns

D-1

D-2

Enable Delay Time 12 ns

Disable Delay Time 12 ns

EL7457C

3

EL7457C

40MHz Non-Inverting Quad CMOS Driver

EL7457C

Typical Performance Curves

Max Power

11

1.0

0.8

0.6

0.4

Max Power(W)

0.2

0

Quiescent Supply Current vs Supply Voltage

9

T=25°C

2.0

1.8

1.6

1.4

1.2

1.0

0.8

Supply Current (mA)

0.6

0.4

0.2
0

Rise/Fall Time vs Supply Voltage

1

CL=1000pF, T=25°C

25

θja=158°C/W, QSOP-16

25 10075050

Temperature (°C)

All Inputs = 0

815

5

Supply Voltage (V)

θja=110°C /W , SO - 16

All Inputs = VS+

11

Switch Threshold vs Supply Voltage

10

T=25°C

1.8
High Limit = 2.4V

1.6

VH to OUT

10

Hysteresis

15

1.4

Input voltage (V)

1.2

1.0

“On” Resistance vs Supply Voltage

8

I

=100mA, T=25°C

OUT

9

8

7

6

5

“On” Resistance (Ω)

4

VL to OUT

3

12

2

5

Rise/Fal l Time vs Temperature

2

CL=1000pF, VS+=15V

16

Low Limit = 0.8V

71512510

Supply Voltage (V)

Supply Voltage (V)

20

t

R

15

t

Rise/Fall Time (ns)

10

5

5

F

7.5 15
Supply Voltage (V)

12.5

10

14

12

10

Rise/Fall Time (n s)

8

6

-50

t

F

0

t

R

50

Temperature (°C)

100

150

4

Typical Performance Curves (cont.)

EL7457C

EL7457C

40MHz Non-Inverting Quad CMOS Driver

Propagation Delay vs Supply Voltage

3

CL=1000pF, T=25°C

25

20

15

Delay Time (ns)

10

5

5.0

Rise/Fall Time vs Load

5

VS+=15V, T= 25°C

140

120

100

80

60

Rise/Fall Time (ns)

40

20

0

470 10000

100

t

D2

t

D1

7.5 15.0

10.0 12.5

Supply Voltage (V)

t

F

1000 4700

2200

Load Capacitance (pF)

t

R

Propagation ,Delay vs Temperature

4

CL=1000pF, VS+=15V

18

16

t

14

12

Delay Time (ns)

10

8

6

-25 25 75 100

Supply Current Per Channel vs Capacitive Load

6

VS+=VH=10V, VS-=VL=0V, T=25°C, f=100kHz

12

10

8

6

4

Supply Current (mA)

2

0

100 1k 10k

D2

0125-50 50

Temperature (°C)

Load Capacitance (pF)

t

D1

Supply Current Per Channel vs Frequency

7

CL=1000pF, T=25°C

100

10

1.0

Supply Current (mA)

VS+=5V

0.1

VS+=15V

VS+=10V

1M 10M10k 100k

Frequency (Hz)

5

EL7457C

40MHz Non-Inverting Quad CMOS Driver

EL7457C

Nominal Operating Voltage Range

PIN MIN MAX

+ to VS- 5V 15V

V

S

V

- to GND -5V 0V

S

VH V

VL V
VH to VL 0V 15V
VL to V

-0V 8V

S

Timing Diagrams

- + 2.5V VS+

S

-V

Input

Output

S

2.5V

0

90%

S

5V

+

10%

t

D1

t

R

t

D2

t

F

6

Standard Test Configuration

EL7457C

EL7457C

40MHz Non-Inverting Quad CMOS Driver

10kΩ

INC

IND

VS+

INA

EN

INB

VL

4.7µF

0.1µF

1

2

3

4

5

NC

6

7

8 9

16

15

14

13

NC

12

11

10

1000pF

1000pF

1000pF

1000pF

4.7µF0.1µF

0.1µF

4.7µF

4.7µF0.1µF

VS+

OUTA

OUTB

VH

OUTC

OUTD

VS-

7

EL7457C

40MHz Non-Inverting Quad CMOS Driver

EL7457C

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)
9V
10 OUTD Output Channel D

- Negative Supply Voltage

S

VS+

INPUT

VS-

Circuit 1

VH

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

+ Positive Supply Voltage

S

8

OUTPUT

VS­VL

Circuit 2

Block Diagram

EL7457C

EL7457C

40MHz Non-Inverting Quad CMOS Driver

VS+

INPUT

GND

VS-

Level

Shifter

OE

3-State
Control

VH

OUTPUT

VL

9

EL7457C

40MHz Non-Inverting Quad CMOS Driver

EL7457C

Application Information:

Product Description

The EL7457 C is a high perfo rmance 40MHz ul tra-h igh
speed quad driver. Each channel of the EL7457C con­sists of a single P-channel high side driver and a single
N-channel low side driver. These 3Ω devices will pull
the output (OUT

) to either the high or low voltage, on

X

VH and VL respectively, depending on the i nput logic
signal (INX). 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 pi n, whe n pu lle d low w il l p ut al l ou tp uts
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 releva nt
package should be chosen depending on the calculated
power dissipation.

Supply Voltage Range and Input Compatibility

The EL7457C is desi gned fo r ope ration on su pplies f rom
5V to 15V with 10% tolerance (i.e. 4.5V to 16.5V). The
table on page 6 shows the s pe ci fic ations for the relatio n­ship between the V

+, VS-, VH, VL and GND pins. The

S

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

+) of 5V, the

S

EL7457C is also compatible with TTL inputs.

Power Supply Bypassing

When using the EL7457C, it is very important to use
adequate power supp ly bypa ssing. The high switchi ng
currents developed by the EL7457C necessitate the use
of a bypass capacitor on both the positive and negative
supplies. It is recommended that a 4.7µF tantalum
capacitor be used in parallel with a 0.1µF l ow-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 EL7457C is driving highly
capacitive loads.

Power Dissipation Calculation

When switching at high speeds, or driving heavy loads,
the EL7457C drive cap abili ty is limite d by the ri se in d ie
temperature brought abou t by interna l power dissipatio n.
For reliable operation die temperature must be kept
below T
power dissipation f or a given app lic atio n pr io r to selec t­ing the package type.

Power dissipation ma y be calculated:

where:

• V

S

V

S

• V

out

• C

L

• C

INT

is the quiescent supply current (3mA max.) and

• I

S

• f is frequency
Having obtained the application’s power dissipation, a

maximum package thermal coefficient may be deter­mined, to maintain the internal die temperature below
T

jmax

where:

• T

jmax

• T

max

• PD is the power dissipation calculated above.
Using the value of θ

tion may be selected.
In applications with a θja greater than 158°C/W, a 16-pin

QSOP may be use d. A 1 6- pin SOIC is suitable f o r a p pli ­cations with a θ

(125°C). It is necessary to calculate the

jmax

4

PD VSIS×()C

+=

∑

1

2

× f×()CLV

INTVS

2

× f×()+

OUT

is the total power supply to the EL7457C (from
+ to VS-),

is the swing on th e output (VH - VL),

is the load capacitance,

is the internal load capacitance (50pF max.),

.

T

–()

ja

jmaxTmax

----------------------------------------=

PD

θ

is the maximum junction t emperature (125°C),

is the maximum operating temperature,

a suitable package for the applica-

ja,

value greater than 110°C/W. However,

ja

10

EL7457C

40MHz Non-Inverting Quad CMOS Driver

EL7457C

if the calculated value of θja is less than 110°C/W, the
application must be dera te d to preve nt prematu r e fail u re
of the device, ei ther by reducing the switching fre-

quency, the capacitive load or the maximum operating
temperature.

11

EL7457C

40MHz Non-Inverting Quad CMOS Driver

EL7457C

General Disclaimer

Specifications contained in this data sheet are in effect as of the publicat ion date shown. Elantec, Inc. re serves the r ight to make changes in th e cir­cuitry or specifications cont ained herein at a ny time without notice. Elantec , Inc. assumes no res ponsibili ty for t he us e of an y circuits descr ibed
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 intend ed to sup-

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Milpitas, CA 95035
Telephone: [phone]

(888) ÉLANTEC
Fax: [phone]
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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 con­templating applicatio n of Elantec, Inc. P roducts in Li fe Support
Systems are requested to contact Elantec, Inc. factory headquarters
to establish suitable terms & conditions for these applications. Elan­tec, Inc. ’s warranty is limited to replacement of defective
components and does not cov er injury to persons or prop erty or
other consequential damages.

December 7, 1999

12

Printed in U.S.A.