feature

Low power consumption. 105 MW symmetrical slew rate.

1250V/µs 0.1dB gain flatness.

165MHz-3dB bandwidth. 330 MHz off isolation (100MHz).

70dB crosstalk rejection (30MHz). 80dB differential gain and phase.

0.01%/0.01 degree high ESD rating. > 2000 Volt TTL compatible control input Open collector count output Improved replacement of GX4404

application

Professional Video Switching and Routing

HDTV

Computer Graphics

RF Switching and Routing

illustrate

The HA4404B is a very wide bandwidth 4x 1 crosspoint switch ideal for professional video switching, HDTV, com-mobile, high performance applications such as computer monitor cabling. The circuit features low power consumption (105mW enabled, 4mW disabled), excellent differential gain and phase, and high isolation. The output switches to a high impedance state when disabled, making the HA4404B ideal for wiring matrix devices. The HA4404B requires no external current source, fea-fast switching and symmetrical slew rate. Statistics Table - The input is an open collector PNP transistor providing a cross point selection indication via V+. For 4x 1 crosspoint-NOS control signals without count outputs or with synchronizers, please refer to the HA4314B and HA4344B datasheets respectively.

Absolute Maximum Ratings Thermal Information

The voltage between V+ and V-. 12 volts

Input voltage. V power

Digital input current (Note 2). ±25mA

Analog input current (Note 2). mA

Output current. 20 mA

Electrostatic discharge rating

Human body model (per MIL-STD-883 method 3015.7). 2000 volts

operating conditions

temperature range. 0 to 70 degrees Celsius

Thermal Resistance (Typical, Note 1) θJA(o C/W) SOIC Package. 115

Maximum connection temperature (mold). 175 degrees Celsius

Maximum Junction Temperature (Plastic Packaging). 150 degrees Celsius

Maximum storage temperature range. -65 degrees Celsius to 150 degrees Celsius

Maximum lead temperature (10s for soldering). 300 degrees Celsius (SOIC - lead only)

operating conditions

temperature range. 0 to 70 degrees Celsius

CAUTION: Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is only a pressure rating and does not imply that the device operates under the above or any other conditions described in the operating section of this specification.

notes:

5. θJA is measured in free air with components mounted on an evaluation PC board.

6. If the input signal is applied before power is applied, the input current must be limited to these maximum values.

Electrical Specifications V Power = ±5V, RL = 10kΩ, V CS = 0.8V, unless otherwise specified

Electrical Specifications V Power = ±5V, RL = 10kΩ, V CS = 0.8V, unless otherwise specified (continued)

notes:

7. This parameter is not tested. Limits are determined based on laboratory characteristics and reflect batch-to-batch variation.

8. The unit is 100% tested at 25°C; guaranteed, but not tested at 0°C and 70°C.

PC board layout

The frequency response of this circuit depends heavily on the considerations when designing the PC board. Using low inductive components like chip resistors and chip capacitors is highly recommended, while a solid ground is a must! Care should be taken to disconnect the power supply. Large value (10µF) tantalum parallel with small value tantalum (0.1µF) chip capacitors work well in most cases. Keep the input and output traces as short as possible, as trace inductors and capacitors can easily become performance limiting items.

Application Information General

The HA4404B is a 4 x 1 crosspoint switch ideal for the matrix element of high performance switches and routers. This crossover has low input capacitance and high input resistance - when combined with an external 75Ω resistor. However, if several HA4404B inputs are connected together, the use of input buffers should be considered (see Figure 1). This crossover - no feedback or gain setting resistors, so the output is a true high impedance load (CS=1) when the IC is disabled. Ground Connections All ground pins are connected to a common point on the die, so any of them is sufficient as a functional GND con- connection. For best isolation and crosstalk rejection, how - all ground pins must be connected to a ground plane. FREQUENCY RESPONSE Most applications using the HA4404B require - setting the resistor Rs to adjust the response of the specific load Capacitance, C1, Drive. Bandwidth and slew rate decrease as CL increases (as shown in the Electrical Specifications table), so carefully consider component placement - minimize trace length. In large matrix configurations when CL is larger, by cascading two stages of crosspoint-composite outputs in multiple cases (see Figure 2), or by distributing the load between the two drivers, if CL is due to the bus and subsequent stage input capacitance . Control Signal This is a TTL/CMOS compatible active low chip select input. When driven high, CS forces the output to a true high impedance state and fac reduces power consumption - Task Outline 25.

The CS input has no on-chip pull-down resistor, so if the enable function is not used. A0, A1 - These are binary coded, TTL/CMOS compatible address inputs that select which of the four inputs - connect to the crosspoint output. T0-T3- count outputs are open collector PNP transistors connected to V+. When CS=0, the PNP transistor associ- ated is enabled for the selected input and is currently the deliver-responsible. When the cross point is disabled, or the channel is not selected, the count output shows a very high impedance to the external circuit. Several count outputs may be wired or wired together to produce complex control signals - as shown in the application circuit below. The counting load can be terminated at GND or V- as long as the con- continuous output current does not exceed 3mA (6mA duty cycle at 50%, etc.).

Switch/Router Application Figure 1 illustrates one possibility - utilizing the HA4404B's 4 x 4 switch/router's low power band for the switch matrix. A 4 x 4 switch/router allows four outputs driven by any of the four inputs (eg each of the four inputs can be connected to a different output - one input can be connected to multiple outputs). This apple-cation utilizes the HA4600 (output disabled video buffer) for the input buffer, the HA4404B as the switch matrix, and the HFA1112 (programmable gain buffer) as the two output drivers. Figure 2 details the 16 x 1 switcher (essentially 16: using the HA4201 (1 x 1 crosspoint) and the HA4404B in a cascaded stage configuration to minimize capacitive loading on each output node, thereby increasing the system-instantaneous variable electromagnetic bandwidth.

Power-Up Precautions Analog or digital inputs should not use any signal prior to power-up. Latch-up can occur if the input is driven at power up. To prevent latch-up, the input current during power-up must not exceed the values listed in Absolute Maximum Ratings. Intersil's Crosspoint Family Intersil offers a variety of 4x1 and 1x1 crosspoint switches. In addition to the HA4404B, the 4x 1 series also includes the HA4314 and HA4344. The HA4314 is a basic 14-wire device with no count output. The HA4344 is a 16-wire crosspoint with synchronous control lines (A0, A1, CS). With synchroni- the control information of the next channel switch can be loaded into the crosspoint without affecting the cur-rent condition. On subsequent clock edges, the stored control state affects the desired channel switch. The 1x 1 family consists of HA4201 and HA4600. They are basically similar units, but the HA4201 includes a count output. 1 x 1 can be used as a high performance - managed video input buffer, or when high isolation is required.

Typical performance curves unless otherwise specified, V supply = ±5V, TA = 25 oC, RL = 10kΩ

Typical Performance Curves V supply = ±5V, TA = 25 oC, RL = 10kΩ, unless otherwise specified (continued)