The HA4314B is a very wide bandwidth 4x 1 crosspoint switcher for high performance applications such as professional video switching, HDTV and, computer surveillance routing. 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 HA4314B ideal for wiring matrix devices. The HA4314B requires no external current source and features fast switching and symmetrical slew rates. For 4x 1 crosspoints (channel indicators) or sync control signals with count outputs, please refer to the HA4404B and HA4344B datasheets. For audio channels requiring larger signal fluctuations, see the CD74HC22106 (8 x 8), CD22M3493 (12 x 8), and CD22M3494 (16 x 8) data sheets.

feature

Low power consumption. 105 MW symmetrical slew rate. 1 400 V/µs 0.1dB gain flatness. 100MHz-3dB bandwidth. 400 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 improves replacement of GX4314 and GX4314L

application

Professional Video Switching and Routing

HDTV

Computer Graphics

RF Switching and Routing

PCM data routing

Absolute Maximum Ratings Thermal Information

The voltage between V+ and V-. 12 volt input voltage. V supplies digital input current (Note 2). ±25mA analog input current (Note 2). mA output current. 20 milliseconds Quiet Electrical Discharge Rating Human Body Model (per MIL-STD-883 Method 3015.7). 2000 volt operating condition temperature range. 0oC to 70oC Thermal Resistance (Typical, Note 1) θJA(oC/W) PDIP Package. 100 SOIC packs. 120 SSOP packages. 140 Maximum connection temperature (mold). 175°C maximum junction temperature (plastic package). 150 degrees Celsius maximum storage temperature range. -65°C to 150°C maximum lead temperature (10s for soldering). 300 degrees Celsius (SOIC and SSOP - lead only)

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

notes:

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

2. 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, VCS = 0.8V, unless otherwise specified

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

notes:

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

4. The unit is 100% tested at 25°C; it is guaranteed not to be 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 HA4314B is a 4 x 1 crosspoint switch ideal for the matrix element of high performance switches and routers. The low input capacitance and high input resistance of this cross point provide excellent video termination when used with an external 75Ω resistor. Nonetheless, if several HA4314B inputs are connected together, a buffer should be considered when using one input (see Figure 1). This crossover contains no feedback or gain setting resistors, so the output is a true high impedance load when the IC is disabled (CS=1). Ground Connections All ground pins are connected to a common point on the die, so any of them is sufficient as a functional GND connection. For best isolation and crosstalk rejection, however, all ground pins must be connected to a ground plane. Frequency Response Most applications using the HA4314B require a series output resistor, RS, to adjust the response capacitance, CL, drive for a specific load. Bandwidth and slew rate decrease with increasing chlorine content (as shown in the Electrical Specifications table), so carefully consider component placement to minimize trace length. In large matrices with large CL configurations, better frequency response is achieved through the multiplexed output case (see Figure 2), or distributed if CL is due to bus and post-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 reduces power dissipation by a factor of 25. The CS input does not have an 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 is connected to the crosspoint output. Switch/Router Application Figure 1 illustrates a broadband, low power, 4 x 4 switch/router, HA4314B utilizing a switch matrix. A 4 x 4 switch/router allows any of the four outputs to be driven by any of the four outputs (for example, each of the four inputs can be connected to a different output, or one input can be connected to multiple output). This application uses HA4600 (video buffer, output disabled) for input buffer, HA4314B as switch matrix and HFA1112 (programmable gain buffer) as gain for both output drivers. Figure 2 details the configuration node for a 16 x 1 switcher (essentially 16:1 mux) using the HA4201 (1 x 1 crosspoint) and a cascaded HA4314B to minimize capacitive loading on each output, thereby increasing system 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 HA4314B, the 4x 1 series also includes the HA4404 and HA4344. The HA4404 is a 16-lead unit that displays the count output for the selected channel. HA4344 is with synchronous control wire (A0, A1, carbon steel). In the case of synchronization the next channel switch can be loaded into the crosspoint without affecting the current state. The control state stored on subsequent clocks affects the desired channel switching. The 1x 1 family consists of HA4201 and HA4600. They are basically similar units, but the HA4201 includes a count output (enable indicator). 1 x 1 is used as a high performance video input buffer or switch where a high degree of isolation is required.

Unless otherwise specified, typical performance curves are VSUPPLY=±5V, TA=25oC, RL=10kΩ

Unless otherwise specified, typical performance curves are VSUPPLY=±5V, TA=25oC, RL=10kΩ (continued)

notes:

1. Control size: inches. In case of conflict between English and metric sizes, inch size controls.

2. Dimensions and tolerances conform to ANSI Y14.5M-1982.

3. Symbols Publication No. 95 is defined in Section 2.2 "List of MO Series Symbols".

4. When measuring dimensions A, A1 and L, the package should be located on the GEDEC seat gauge GS-3.

5. D, D1 and E1 dimensions do not include mold flash or protrusions. Mold flash or protrusions shall not exceed 0.010 in. (0.25 mm).

6. Measure with a wire perpendicular to the reference plane.

7. eB and eC are measured at the tip of the wire with the wire untensioned. eC must be zero or greater.

8.B1 maximum dimension does not include dam bar protrusion. Dambar protrusions shall not exceed 0.010 inches (0.25 mm).

9. N is the maximum number of terminal positions.

10. Corner leads (1, N, N/2 and N/2+1) for E8.3, E16.3, E18.3, E28.3, B1 dimension for E42.6 is 0.030-0.045 inches (0.76- 1.14mm)