The CD22354A and CD22357A are monolithic silicongate, double-poly CMOS integrated circuits containing the band-limiting filters and the companding A/D and D/A conversion circuits that conform to the AT&T D3/D4 specifications and CCITT recommendations.
The CD22354A provides the AT&T m-law and the CD22357A provides the CCITT A-law companding characteristic.
The primary applications for the CD22354A and CD22357A are in telephone systems.
These circuits perform the analog and digital conversions between the subscriber loop and the PCM highway in a digital switching system.
The functional block diagram is shown below.
With flexible features, including synchronous and asynchronous operations and variable data rates, the CD22354A and CD22357A are ideally suited for PABX, central office switching system, digital telephones as well as other applications that require accurate A/D and D/A conversions and minimal conversion time.

* Meets or Exceeds All AT&T D3/D4 Specifications and CCITT Recommendations
* Complete CODEC and Filtering Systems: No External Components for Sample-and-Hold and Auto-Zero Functions.
Receive Output Filter with (SIN X)/X Correction and Additional 8kHz Suppression
* Variable Data Clocks - From 64kHz . . . . . . . . . . . . . . . . . . . . . 2.1MHz
* Receiver Includes Power-Up Click Filter
* TTL or CMOS-Compatible Logic
* ESD Protection on All Inputs and Outputs

* Central Office Switching Systems
* Accurate A/D and D/A Conversions
* Digital Telephones
* Cellular Telephone Switching Systems
* Voice Scramblers - Descramblers
* T1 Conference Bridges
* Voice Storage and Retrieval Systems
* Sound Based Security Systems
* Computerized Voice Analysis
* Mobile Radio Telephone Systems
* Microwave Telephone Networks
* Fiber-Optic Telephone Networks



댓글을 달아 주세요 Comment

• 6A, 600V at TC = +25oC
• 600V Switching SOA Capability
• Typical Fall Time - 130ns at TJ = +150oC
• Short Circuit Rating
• Low Conduction Loss
• Hyperfast Anti-Parallel Diode

The HGTP3N60C3D, HGT1S3N60C3D, and HGT1S3N60C3DS are MOS gated high voltage switching devices combining the best features of MOSFETs and bipolar transistors. These devices have the high input impedance of a MOSFET and the low on-state conduction loss of a bipolar transistor. The much lower on-state voltage drop varies only moderately between +25oC and +150oC. The IGBT used is the development type TA49113. The diode used in anti-parallel with the IGBT is the development type TA49055.
The IGBT is ideal for many high voltage switching applications operating at moderate frequencies where low conduction losses are essential.

Operating Frequency Information
Operating frequency information for a typical device (Figure 13) is presented as a guide for estimating device performance for a specific application. Other typical frequency vs collector current (ICE) plots are possible using the information shown for a typical unit in Figures 4, 7, 8, 11 and 12. The operating frequency plot (Figure 13) of a typical device shows fMAX1 or fMAX2 whichever is smaller at each point. The information is based on measurements of a typical device and is bounded by the maximum rated junction temperature.
fMAX1 is defined by fMAX1 = 0.05/(tD(OFF)I + tD(ON)I). Deadtime (the denominator) has been arbitrarily held to 10% of the on- state time for a 50% duty factor. Other definitions are
possible. tD(OFF)I and tD(ON)I are defined in Figure 21.
Device turn-off delay can establish an additional frequency limiting condition for an application other than TJMAX.
tD(OFF)I is important when controlling output ripple under a lightly loaded condition.
fMAX2 is defined by fMAX2 = (PD - PC)/(EOFF + EON). The allowable dissipation (PD) is defined by PD = (TJMAX - TC)/RqJC. The sum of device switching and conduction losses must not exceed PD. A 50% duty factor was used Figure 13) and the conduction losses (PC) are approximated by PC = (VCE x ICE)/2.
EON and EOFF are defined in the switching waveforms shown in Figure 21. EON is the integral of the instantaneous power loss (ICE x VCE) during turn-on and EOFF is the integral of the instantaneous power loss during turn-off. All tail losses are included in the calculation for EOFF; i.e. the collector current equals zero (ICE = 0).


댓글을 달아 주세요 Comment

• 5 Multiplex Video Channels
- 1 Independent Channel
- 4 Channels with Enable
• 4 LED Channel Indicator Outputs
• Wideband Video Amplifier . . . . . . . . 25MHz Unity Gain
• Adjustable Video Amplifier Gain
• High Signal-Drive Capability

• Video Multiplex Switch
• 75W Video Amplifier/Line Driver
• Video Signal-Level Control
• Monitor Switching Control
• TV/CATV Audio/Video Switch
• Video Signal Adder/Fader Control

 The CA3256 BiMOS analog video switch has five channels of CMOS multiplex switching for general-purpose videosignal control. One of four CMOS channels may be selected in parallel with channel 5. The CMOS switches are inputs to the video amplifier but may be used in bilateral switching between channels 1 to 4 and channel 5. The analog switches of channels 1 to 4 are digitally controlled with logic level conversion and binary decoding to select 1 of 4

 The enable function controls channels 1 to 4 but does not affect channel 5. LED output drivers are selected with the channel 1-to-4 switch selection to indicate the ONchannel. Channel 5 may be used as a monitor output for data or signal information on channels 1 to 4. The transmission gate switches shown in the block diagram of the CA3256 are configured in a “T” design to minimize feedthrough. When the switch is off, the shunt or center of the “T” is grounded.

 The amplifier has high input impedance to minimize the RON transmission gate insertion loss. The amplifier output impedance is typically 5W in a complementary symmetry output. The amplifier can directly drive a nominal 75W coaxial cable to provide line-to-line video switching. The gain of the amplifier is programmable by different feedback resistor values between pins 8 and 9. Compensation may also be used between these pins for an optimally flat frequency response.
 An internal regulated 5V bias reference with temperature compensation permits stable direct-coupled output drive and minimizes DC offset during signal switching.


댓글을 달아 주세요 Comment

• Low ON Resistance . . . . . . . . . . . . 75W (Typ) at VDD = 12V
• “Built - In” Latched Inputs
• Large Analog Signal Capability . . . . . . . . . . . . . . . ±VDD/2
• Switch Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . 10MHz
• Matched Switch Characteristics
DRON = 8W (Typ) at VDD = 12V
• High Linearity - 0.25% Distortion (Typ) at f = 1kHz,
VIN = 5VP-P, VDD - VSS = 10V, and RL = 1kW
• Standard CMOS Noise Immunity

• Telephone Systems
• Studio Audio Switching
• Multisystem Bus Interconnect

CD22101 and CD22102 crosspoint switches consist of 4 x 4 x 2 arrays of crosspoints (transmission gates) with a 4-line to 16-line decoder and 16 latch circuits. Any one of the sixteen crosspoint pairs can be selected by applying the appropriate four-line address, corresponding crosspoints in each array are turned on and off simultaneously. Any number of crosspoints can be turned on simultaneously.

 In the CD22101, the selected crosspoint pair can be turned on or off by applying a logic ONE or ZERO, respectively, to the data input, and applying a ONE to the strobe input. When the device is “powered up”, the states of the 16 switches are indeterminate. Therefore, all switches must be turned off by putting the strobe high, data-in low, and then addressing all switches in

 The selected pair of crosspoints in the CD22102 is turned on by applying a logic ONE to the KA (set) input while a logic ZERO is on the KB input, and turned off by applying a logic ONE to the KB (reset) input while a logic ZERO is on the KA input. In this respect, the control latches of the CD22102 are similar to SET/RESET flip-flops. They differ, however, in that the simultaneous application of ONEs to the KA and KB inputs turns off (resets) all crosspoints. All crosspoints in both devices must be turned off as VDD is applied.


댓글을 달아 주세요 Comment

• Low Power Consumption as Low as 100mW Per Amplifier
• Independent Biasing for Each Amplifier
• High Forward Transconductance
• Programmable Range of Input Characteristics
• Low Input Bias and Input Offset Current
• High Input and Output Impedance
• No Effect on Device Under Output Short-Circuit Conditions
• Zener Diode Bias Regulator

• For Low Power Conventional Operational Amplifier Applications
• Active Filters
• Comparators
• Gyrators
• Mixers
• Modulators
• Multiplexers
• Multipliers
• Strobing and Gating Functions
• Sample and Hold Functions

The CA3060 monolithic integrated circuit consists of an array of three independent Operational Transconductance Amplifiers (see Note). This type of amplifier has the generic characteristics
of an operational voltage amplifier with the exception that the forward gain characteristic is best described by transconductance rather than voltage gain (open-loop voltage gain is the product of the transconductance and the load resistance, gMRL). When operated into a suitable load resistor and with provisions for feedback, these amplifiers are well suited for a wide variety of operational-amplifier and related applications. 
 In addition, the extremely high output impedance makes these types particularly well suited for service in active filters. The three amplifiers in the CA3060 are identical push-pull Class A types which can be independently biased to achieve a wide range of characteristics for specific application. The electrical characteristics of each amplifier are a function of the amplifier bias current (IABC). This feature offers the system designer maximum flexibility with regard to output current capability, power consumption, slew rate, input resistance, input bias current, and input offset current.
 The linear variation of the parameters with respect to bias and the ability to maintain a constant DC level between input and output of each amplifier also makes the CA3060 suitable for a variety of nonlinear applications such as mixers, multipliers, and modulators. In addition, the CA3060 incorporates a unique Zener diode regulator system that permits current regulation below supply voltages normally associated with such systems.


댓글을 달아 주세요 Comment