Datasheet MAX4111CSA, MAX4221CSA Datasheet (Maxim)

_______________General Description

The MAX4111/MAX4121/MAX4221 wideband video
switches are optimized for high-definition, broadcast­quality, composite (HDTV, NTSC, PAL, SECAM, and
RGB) video switching arrays. Their open-loop buffer
amplifiers offer 0.1dB gain flatness to 150MHz. They
operate from ±5V supplies and feature differential
phase and gain error of only 0.01°/0.01%, respectively.
The ultra-low switching glitch (13mV) is positive to
avoid confusion with any sync pulse.

Ideal as building blocks in large arrays, these devices
feature a constant, high input impedance and a disable
function that puts the outputs into a high-impedance
state and reduces the operating current to only 250µA.
The open-loop architecture allows the outputs to drive
capacitive loads without oscillation. Other key features
include -92dB crosstalk and -78dB isolation (MAX4121).

The MAX4111/MAX4121/MAX4221 are offered in nar­row plastic DIP and SO packages. See the table below
for key features:

________________________Applications

Video-Router and Crosspoint Arrays
Broadcast/HDTV-Quality Color Signal Multiplexing
RF and IF Routing
Graphics Color-Signal Routing
Telecom Routing
Data Acquisition

____________________________Features

♦ -3dB Bandwidth of 330MHz
♦ 0.1dB Gain Flatness of 150MHz
♦ 700V/µs Slew Rate
♦ 0.01°/0.01% Differential Phase/Gain
♦ Low Power: 5.5mA Max
♦ -92dB Crosstalk and -78dB Off Isolation at 30MHz
♦ High-Z Outputs when Disabled
♦ 3pF Input Capacitance
♦ Ultra-Low Switching Glitch
♦ On-Board Control Logic

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/

Crosspoint Building Blocks

________________________________________________________________

Maxim Integrated Products

1

1

2

3

4

8

7

6

5

EN
V

CC

OUT

V

EE

N.C.

GND

IN

GND

MAX4111

TOP VIEW

SO

16
15
14
13
12
11
10

9

1
2
3
4
5
6
7
8

SEL0
SEL1
V

CC

OUT0

GND

IN1

GND

IN0

MAX4221

V

EE

OUT1
SEL2
SEL3

IN3

GND

IN2

GND



Narrow SO

1

2

3

4

8

7

6

5

EN
V

CC

OUT

V

EE

IN1

GND

IN0

A0

MAX4121

SO

___________________________________Pin Configurations/Functional Diagrams

Call toll free 1-800-998-8800 for free samples or literature.

19-0402; Rev 0; 6/95

PART

MAX4111CSA
MAX4121CSA
MAX4221CSE

0°C to +70°C

0°C to +70°C

0°C to +70°C

TEMP. RANGE PIN-PACKAGE

8 SO
8 SO
16 Narrow SO

EVALUATION KIT

AVAILABLE

______________Ordering Information

PART DESCRIPTION PINS

MAX4111 SPST, single-input, single-output switch 8
MAX4121 SPDT, 2-input, single-output switch 8
MAX4221 Dual, SPDT, 2-input, single-output switch 16

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/
Crosspoint Building Blocks

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VS= ±5V, -2.5V ≤ VIN≤ +2.5V, RL= 5kΩ, CL≤ 5pF, TA= 0°C to +70°C, unless otherwise noted. Typical values are at TA= +25°C.)

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 in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Supply Voltages

V

CC

....................................................................................+6V

V

EE

......................................................................................-6V

V

CC-VEE

...........................................................................+12V

Analog Input Voltage .......................(V

EE

- 0.3V) to (VCC+ 0.3V)

Digital Input Voltage...................................-0.3V to (V

CC

+ 0.3V)

Duration of Short Circuit to Ground............................Continuous

Continuous Power Dissipation (T

A

= +70°C)

8-Pin SO (derate 5.88mW/°C above +70°C)................471mW

16-Pin Narrow SO (derate 8.70mW/°C above +70°C) ...696mW

Operating Temperature Range...............................0°C to +70°C

Storage Temperature Range.............................-65°C to +160°C

Junction Temperature......................................................+150°C

Lead Temperature (soldering, 10sec).............................+300°C

VS= ±4.5V to ±5.5V

VS= ±4.5V to ±5.5V

Channel selected

V

OUT

= 0V

f = DC to 50MHz

VIN= ±2.5V

V

VS= ±4.5V to ±5.5V

VS= ±4.5V to ±5.5V

Channel disabled

TA= T

MIN

to T

MAX

Channel selected

VIN= 0V

Per channel

TA= +25°C

VS= ±4.5V to ±5.5V

VIN= 0V, channel enabled or disabled

CONDITIONS

V0.8V

INL

Logic Input Low Voltage

V2.0V

INH

Logic Input High Voltage

pF5C

OUT(OFF)

Disabled Output Capacitance

MΩ30R

OUT(OFF)

Disabled Output Resistance

nA10I

OUT(OFF)

Disabled Output Current

Ω20R

OUT

Output Resistance

V/V

0.97 1.0

A

V

Voltage Gain

0.98 1.0TA= +25°C

dB50PSRRPower-Supply Rejection Ratio

TA= T

MIN

to T

MAX

µA

mV

±15

V

OS

Output Offset Voltage

±5 ±10

10I

INL

pFC

IN

Input Capacitance

4.0 5.5TA= +25°C

TA= T

MIN

to T

MAX

±4.5 ±5.0 ±5.5V

S

3

Operating Supply Voltage

Logic Input Low Current

µA

MΩ

100

R

IN

Input Resistance

0.4

10I

INH

µA

±0.02

I

B

Input Bias Current

6.5

150 200

V±2.5V

IN

Input Voltage Range

±2.5 ±4.0

Channel disabled

Logic Input High Current

UNITSMIN TYP MAXSYMBOLPARAMETER

mAI

CC, IEE

Operating Supply Current

MAX4111/MAX4121

µA

250 350

I

CC, IEE

Disabled Supply Current

DC PARAMETERS

MAX4221

dB

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/

Crosspoint Building Blocks

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS

(VS= ±5V, -2.5V ≤ VIN≤ +2.5V, RL= 5kΩ, CL≤ 5pF, TA= 0°C to +70°C, unless otherwise noted. Typical values are at TA= +25°C.)

Note 1: Full-Power Bandwidth is inferred from Slew Rate (SR) testing by the equation SR = ωEP, where EPis the peak output

voltage and ω =2πf.

Note 2: Differential Gain and Phase are tested using a modulated ramp, 100IRE (0.714V).

VIN= 1.4Vp-p

f = 30MHz, VIN= 1.4Vp-p

f = 30MHz, VIN= 1.4Vp-p

V

OUT

= 5Vp-p

Chip-to-chip, f = 3.58MHz

f = 3.58MHz

VIN= 5Vp-p
VIN= 0.1Vp-p
DC to 30MHz
DC to 150MHz

f = 3.58MHz

CONDITIONS

dBc-70Third Harmonic

dBc-65Second Harmonic

degrees±0.2Input-Output Delay Matching

ps860Group Delay

mVp-p13Switching Transient

ns500t

ON

Channel Switching On Time

µs1.0t

OFF

Channel Switching Off Time

-92

degrees0.01DPDifferential Phase (Note 2)

110

700

%0.01DGDifferential Gain (Note 2)

dB0.08Gain Peaking

MHz

45

FPBW

Full-Power Bandwidth
(Note 1)

MHz330f

3dB

-3dB Bandwidth

0.02
dB

0.1

Gain Flatness

UNITSMIN TYP MAXSYMBOLPARAMETER

VIN= 1Vp-p,
f = 30MHz

dB

-70

All-Hostile Crosstalk

VIN= 1Vp-p,
f = 30MHz, see test
circuit

dB

86

Off Isolation

MAX4121
MAX4221
MAX4111

V

OUT

= 1.4Vp-p

V/µs

500

SRSlew Rate

VIN= 0.1Vp-p ps950tr/t

f

Small-Signal Rise Time

MAX4121

84MAX4221

78

AC PARAMETERS

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/
Crosspoint Building Blocks

4 _______________________________________________________________________________________

__________________________________________Typical Operating Characteristics

(VS= ±5V, RL= 5kΩ, CL≤ 5pF, TA = +25°C, unless otherwise noted.)

-2

1 10 1000



GAIN vs. FREQUENCY

-10

-6

0

2

-8

-4

-12

-16

-18

-14

MAX4111 TOC-01

FREQUENCY (MHz)

GAIN (dB)

100

-0.1

1 10 100



GAIN FLATNESS

-0.3

0

-0.4

-0.2

-0.6

-0.7

-0.5

0.1

0.2

0.3

MAX4111 TOC-02

FREQUENCY (MHz)

GAIN (dB)

1000

0.1 1 100 500



OUTPUT RESISTANCE vs. FREQUENCY

40

10

0

20

30

MAX4111 TOC-03

FREQUENCY (MHz)

OUTPUT RESISTANCE (Ω)

10

0

10k 100k 10M 100M

POWER-SUPPLY REJECTION RATIO

vs. FREQUENCY

40

20

-10

30

10

50
60

70
80
90

MAX4111 TOC-04

FREQUENCY (Hz)

AMPLITUDE (dB)

1M

V

CC

V

EE

-40

1 100 1000

MAX4111

OFF ISOLATION vs. FREQUENCY

40

0

20

-20

60

140
160

100
120

80

MAX4111 TOC-07

FREQUENCY (MHz)

AMPLITUDE (dB)

10

40

1 100 1000

MAX4121 ALL-HOSTILE CROSSTALK

vs. FREQUENCY

-40

0

-20

20

-60

-140

-160

-100

-120

-80

MAX4111 TOC-05

FREQUENCY (MHz)

AMPLITUDE (dB)

10

40

1 10 1000

MAX4221 ALL-HOSTILE CROSSTALK

vs. FREQUENCY

-40

0

60

-20

20

-60

-140

-100

-120

-80

MAX4111 TOC-06

FREQUENCY (MHz)

AMPLITUDE (dB)

100

-40

1 100 1000

MAX4121

OFF ISOLATION vs. FREQUENCY

40

0

20

-20

60

140
160

100
120

80

MAX4111 TOC-08

FREQUENCY (MHz)

AMPLITUDE (dB)

10

-40

1 10 1000

MAX4221

OFF ISOLATION vs. FREQUENCY

40

0

-60

20

-20

60

140

100
120

80

MAX4111 TOC-09

FREQUENCY (MHz)

AMPLITUDE (dB)

100

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/

Crosspoint Building Blocks

_______________________________________________________________________________________

5

MAX14111 TOC-10

TIME (5ns/div)

VOLTS

(100mV/div)

IN

GND

GND

OUT



SMALL-SIGNAL PULSE RESPONSE

(RL = 5kΩ)

MAX14111 TOC-11

TIME (5ns/div)

OUT

(1V/div)

IN

(2.5V/div)

GND

GND



LARGE-SIGNAL PULSE RESPONSE

(RL = 5kΩ)



VOLTS

MAX14111 TOC-12

TIME (5ns/div)

VOLTS

(100mV/div)

IN

GND

GND

OUT



SMALL-SIGNAL PULSE RESPONSE

(CL = 47pF, RL = open)

MAX14111 TOC-14

TIME (1µs/div)

1V/div

2V/div



ENABLE/DISABLE DELAY TIME

(INPUT = 1.1V)



OUTPUT

ENABLE 



OUT

GND



MAX14111 TOC-13

TIME (10ns/div)



OUT

(1V/div)

IN

2.5V/div
GND

GND



LARGE-SIGNAL PULSE RESPONSE

(CL = 47pF, RL = open)



VOLTS



MAX14111 TOC-15

TIME (1µs/div)

10mV/div

2V/div



OUTPUT GLITCH AMPLITUDE



AMPLITUDE

OUTPUT

A0

____________________________Typical Operating Characteristics (continued)

(VS= ±5V, RL= 5kΩ, CL≤ 5pF, TA = +25°C, unless otherwise noted.)

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/
Crosspoint Building Blocks

6 _______________________________________________________________________________________

____________________________Typical Operating Characteristics (continued)

(VS= ±5V, RL= 5kΩ, CL≤ 5pF, TA = +25°C, unless otherwise noted.)

1 100 1M

10G

100M

NOISE VOLTAGE 
vs. FREQUENCY

3

100

30

10

1

MAX4111 TOC-16

FREQUENCY (Hz)

NOISE VOLTAGE (nV √

Hz

)

10k

3.4
070

SUPPLY CURRENT

vs. TEMPERATURE

5.0

MAX4111 TOC-17

TEMPERATURE (°C)

SUPPLY CURRENT (mA)

30

4.2

3.8

10 20 60

4.6

3.6

4.4

4.0

4.8

40

50

I

EE

I

CC

-0.110

-3

GAIN vs. INPUT VOLTAGE

AND TEMPERATURE

MAX4111 TOC-18

INPUT VOLTAGE (V)

GAIN (dB)

-0.105

-0.100

-0.095

-0.090

-0.085

-2 -1 0 1 2 3

TA = +25°C

TA = 0°C

TA = +70°C

0

0

BANDWIDTH vs.

LOAD CAPACITANCE

MAX4111 TOC-19

LOAD CAPACITANCE (pF)

BANDWIDTH (MHz)

50

100

150

200

250

300

350

20 40 60 80 100

RL = OPEN

-3dB BW

-0.1dB BW

-1.6
0

GAIN vs.

LOAD RESISTANCE

MAX4111 TOC-20

RL(kΩ)

GAIN (dB)

-1.4

-1.2

-1.0

-0.8

-0.6

-0.4

-0.2

0

12345

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/

Crosspoint Building Blocks

_______________________________________________________________________________________ 7

_______________Detailed Description

The MAX4111/MAX4121/MAX4221 video switches are
manufactured with Maxim’s proprietary, ultra-high fre­quency, complementary bipolar process that yields
high bandwidth and low capacitance. Make-before­break switching is used to reduce noise and glitches,
even when switching from part to part in large arrays.
The input buffers provide a constant high input imped­ance, and prevent the make-before-break action from
feeding back to the input.

The design of the switching mechanism limits the
inevitable glitch to less than 13mVp-p. In addition, the
glitch pulse is positive to avoid confusion with negative
sync pulses.

Unity-gain buffers isolate other inputs from the switch­ing action of large multiplex arrays. These buffers can
drive 5kΩ resistive loads. In addition, these devices
drive capacitive loads without oscillation. Load capaci­tance is limited only by system bandwidth require­ments.

The MAX4111/MAX4121/MAX4221 do not contain
buffer latches. The digital inputs are transparent.

______________________________________________________________Pin Description

MAX4221

MAX4121

MAX4111

15, 16

11, 13

9, 10

—

14

12
—

6, 8

—

1, 3

—

—

2, 4, 5, 7

PIN

—

—

—

8

7

5
6

—

—

2, 4

—

1

3

Logic Inputs. Channel Selection Bits for OUT0 of the dual 2x1 (MAX4221). See
Table 3.

SEL1,

SEL0

—

Signal Outputs

OUT1,

OUT0

—

Logic Inputs. Channel Selection Bits for OUT1 of the dual 2x1 (MAX4221).
See Table 3.

SEL3,

SEL2

—

Logic Input. Output Enable for the 1x1, 2x1 switches. A logic high on this
pin enables the output. A logic low causes the output to assume a high­impedance state, and reduces supply current.

EN8

Positive Power-Supply Voltage. Connect to +5V. Decouple to power ground.V

CC

7

Negative Power-Supply Voltage. Connect to -5V. Decouple to power ground.V

EE

5

Signal OutputOUT6
Signal Inputs for the dual 2x1 switchIN2, IN3—

Signal InputIN2
Signal InputIN0, IN1—
No Connect—not internally connectedN.C.4

Logic Input. Channel Selection Bit for the 2x1. See Table 2.A0—

Analog (signal) ground. Since inputs are isolated by these grounds, GND
should be as noise-free as possible.

GND1, 3

FUNCTIONNAME

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/
Crosspoint Building Blocks

8 _______________________________________________________________________________________

__________Applications Information

Grounding, Bypassing,

and PC Board Layout

To obtain the full 330MHz bandwidth of these switches,
Microstrip and Stripline techniques are recommended.
To ensure your PC board does not degrade the
switch’s performance, it’s wise to design the board for
a frequency greater than 1GHz. Even with very short
runs, it’s good practice to use this technique at critical
points such as inputs and outputs.

Use the following guidelines when designing the board:

• Do not use wire-wrap boards, because they are too
inductive.

• Do not use IC sockets. They increase parasitic
capacitance and inductance.

• In general, surface-mount components have shorter
leads and lower parasitic reactance, and give better
high-frequency performance than through-hole com­ponents.

• The PC board should have at least two layers, with
one side a signal side and the other a ground plane.

• Keep signal lines as short and straight as possible.
Do not make 90° turns; round all corners.

• The ground plane should be as free from voids as
possible.

Bypass Components—Capacitors

Surface-mount ceramic capacitors are recommended
to achieve good high-frequency bypassing. A 0.1µF
capacitor in parallel with a 1000pF capacitor should be
used for each supply. The capacitors should be locat­ed as close to the ICs supply pins as possible, with the
smaller value capacitor being closer to the IC than the
other.

Creating Larger Arrays

The MAX4111/MAX4121/MAX4221 were designed as
building blocks for larger arrays. The single-pole switch
allows the system designer much greater control over
crosstalk than multiple switches in a single IC. For this
reason, cable drivers have not been included in the
switch design because of the high-power drive
required (see Figure 6).

Even though the stability of these devices is not wors­ened by adding capacitance, you may want to limit the
number of switches connected together. The
MAX4111/MAX4121/MAX4221 have a finite input capa­citance of about 3pF and a dynamic output resistance
of about 20Ω. This causes a pole at a little more than

2.7GHz. However, in a large array with many switch

inputs, the total capacitance is N x 3pF, where “N” is
the number of switches connected in parallel. The pole
will be located at:

C

STRAY

= Stray capacitance at the interconnect

If the maximum number of switches that may be con­nected while still maintaining bandwidth is less than
your system requirements, use a unity-gain buffer
amplifier to isolate the switch from the remainder of the
inputs.

1

23 20π ( ) xNx pF C x

MHz

STRAY

+Ω

Table 1. MAX4111 Truth Table

Table 2. MAX4121 Truth Table

Table 3. MAX4221 Truth Table

EN OUT

0 High-Z
1 IN

A0 EN OUT

X 0 High-Z
0 1 IN0
1 1 IN1

Note: SEL0 = SEL1 = 1 and/or SEL2 = SEL3 = 1 is not
allowed. Enabling these states will not damage the device,
but may cause excessive supply currents and distortion.

NA11

IN310

IN201

High-Z00

OUT1SEL3SEL2

NA11

IN110

IN001

High-Z00

OUT0SEL1SEL0

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/

Crosspoint Building Blocks

_______________________________________________________________________________________ 9

_________________________________________________________________Test Circuits

MAX4111

NETWORK
ANALYZER

* 20Ω RESISTOR USED TO SIMULATE THE OUTPUT OF AN ON SWITCH.
IN THIS WAY, OPERATION IN AN ARRAY IS SIMULATED.



50Ω 20Ω∗

MAX4121

HIGH-IMPEDANCE

PROBE

NETWORK

ANALYZER

MAX4121

HIGH-IMPEDANCE

PROBE

NETWORK

ANALYZER

* 20Ω RESISTOR USED TO SIMULATE THE OUTPUT OF AN ON SWITCH.
IN THIS WAY, OPERATION IN AN ARRAY IS SIMULATED.

20Ω∗

Figure 1. MAX4111 Off Isolation

Figure 2. MAX4121 All-Hostile Crosstalk

Figure 3. MAX4121 Off Isolation

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/
Crosspoint Building Blocks

10 ______________________________________________________________________________________

MAX4221

NETWORK

ANALYZER

HIGH-IMPEDANCE

PROBE

50Ω

50Ω

50Ω

50Ω

MAX4221

NETWORK
ANALYZER

* 20Ω RESISTOR USED TO SIMULATE THE OUTPUT OF AN ON SWITCH.
IN THIS WAY, OPERATION IN AN ARRAY IS SIMULATED.

20Ω∗

50Ω

50Ω

50Ω

50Ω

HIGH-IMPEDANCE

PROBE

Figure 5. MAX4221 Off IsolationFigure 4. MAX4221 All-Hostile Crosstalk

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/

Crosspoint Building Blocks

______________________________________________________________________________________ 11

16
15
14
13
12
11
10

9

1
2
3
4
5
6
7
8

SEL0A
SEL1A

V

CC

OUTA

MAX4221

V

EE

OUTB
SEL0B
SEL1B



IN0A

75Ω

75Ω

75Ω

75Ω

IN1A

IN0B

IN1B

16
15
14
13
12
11
10

9

1
2
3
4
5
6
7
8

SEL2A
SEL3A

V

CC

MAX4221

V

EE

SEL2B
SEL3B



IN2A

75Ω

75Ω

75Ω

75Ω

IN3A

IN2B

IN3B

16
15
14
13
12
11
10

9

1
2
3
4
5
6
7
8

SEL4A
SEL5A

V

CC

MAX4221

V

EE

SEL4B
SEL5B



IN4A

75Ω

75Ω

75Ω

75Ω

IN5A

IN4B

IN5B

16
15
14
13
12
11
10

9

1
2
3
4
5
6
7
8

SEL6A

= SIGNAL GROUND


POWER- SUPPLY BYPASSING NOT SHOWN.

SEL7A

V

CC

MAX4221

V

EE

SEL6B
SEL7B



IN6A

75Ω

75Ω

75Ω

75Ω

IN7A

IN6B

IN7B

Figure 6. 8x2 Multiplexer Using MAX4221

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

12

__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 [phone]

© 1995 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

MAX4111/MAX4121/MAX4221

330MHz Buffered Video Switches/
Crosspoint Building Blocks

________________________________________________________Package Information

DIM



A

A1

B
C
E
e
H
L

MIN

0.053

0.004

0.014

0.007

0.150


0.228

0.016

MAX

0.069

0.010

0.019

0.010

0.157


0.244

0.050

MIN

1.35

0.10

0.35

0.19

3.80


5.80

0.40

MAX

1.75

0.25

0.49

0.25

4.00


6.20

1.27

INCHES MILLIMETERS

21-0041A

Narrow SO

SMALL-OUTLINE

PACKAGE

(0.150 in.)

DIM



D
D
D

MIN

0.189

0.337

0.386

MAX

0.197

0.344

0.394

MIN

4.80

8.55

9.80

MAX

5.00

8.75

10.00

INCHES MILLIMETERS

PINS

8
14
16

1.270.050

L

0°-8°

HE

D

e

A

A1

C

0.101mm

0.004in.

B