19-0402; Rev 0; 6/95
3 3 0 MHz Bu ffe re d Vid e o S w it c h e s /
Cro s s p o in t Bu ild in g Blo c k s
/MAX421
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
♦ -3dB Bandwidth of 330MHz
The MAX4111/MAX4121/MAX4221 wid e b a nd vid e o
switches are optimized for high-definition, broadcast-
quality, composite (HDTV, NTSC, PAL, SECAM, and
RGB) video switching arrays. Their open-loop buffer
amplifiers offer 0.1dB gain flatness to 150MHz. They
op e ra te from ± 5V s up p lie s a nd fe a ture d iffe re ntia l
phase and gain error of only 0.01°/0.01%, respectively.
The ultra -low switc hing glitc h (13mV) is p ositive to
avoid confusion with any sync pulse.
♦ 0.1dB Gain Flatness of 150MHz
♦ 700V/µs Slew Rate
♦ 0.01°/0.01% Differential Phase/Gain
♦ Low Power: 5.5mA Max
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).
♦ -92dB Crosstalk and -78dB Off Isolation at 30MHz
♦ High-Z Outputs when Disabled
♦ 3pF Input Capacitance
♦ Ultra-Low Switching Glitch
The MAX4111/MAX4121/MAX4221 are offered in nar-
row plastic DIP and SO packages. See the table below
for key features:
♦ On-Board Control Logic
PART
DESCRIPTION
PINS
MAX4111 SPST, single-input, single-output switch
MAX4121 SPDT, 2-input, single-output switch
MAX4221 Dual, SPDT, 2-input, single-output switch
8
8
______________Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
8 SO
16
MAX4111CSA
MAX4121CSA
MAX4221CSE
8 SO
________________________Ap p lic a t io n s
Video-Router and Crosspoint Arrays
Broadcast/HDTV-Quality Color Signal Multiplexing
RF and IF Routing
16 Narrow SO
Graphics Color-Signal Routing
Telecom Routing
Data Acquisition
___________________________________P in Co n fig u ra t io n s /Fu n c t io n a l Dia g ra m s
TOP VIEW
IN0
GND
IN1
SEL0
SEL1
V
1
2
3
4
5
6
7
8
16
15
1
2
3
4
8
7
6
5
A0
IN0
EN
1
2
3
4
8
7
6
5
GND
IN
EN
V
14 CC
V
CC
GND
OUT0
13
12
11
10
9
CC
OUT
GND
IN1
GND
IN2
V
EE
OUT
GND
N.C.
V
EE
MAX4111
OUT1
SEL2
SEL3
V
EE
MAX4121
GND
IN3
SO
SO
MAX4221
Narrow SO
________________________________________________________________ Maxim Integrated Products
1
Ca ll t o ll fre e 1 -8 0 0 -9 9 8 -8 8 0 0 fo r fre e s a m p le s o r lit e ra t u re .