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3D3522
MONOLITHIC MANCHESTER DECODER (SERIES 3D3522)
FEATURES
• • • • • • • • All-silicon, low-power CMOS technology 3.3V operation CMOS compatible inputs and outputs Vapor phase, IR and wave solderable Auto-insertable (DIP pkg.) Low ground bounce noise Maximum data rate: 50 MBaud Data rate range: ±15%
data 3 delay devices, inc.
PACKAGES
RX N/C N/C 1 2 3 4 5 6 7 14 13 12 11 10 9 8 N/C N/C N/C N/C N/C
VDD
RX CLK N/C GND
1 2 3 4
8 7 6 5
VDD N/C N/C DATB
CLK N/C N/C GND
DATB
3D3522M-xxx DIP (.300) 3D3522H-xxx Gull Wing (.300) 3D3522Z-xxx SOIC (.150)
3D3522-xxx DIP (.300) 3D3522G-xxx Gull Wing (.300) 3D3522D-xxx SOIC (.150)
For mechanical dimensions, click here. For package marking details, click here.
FUNCTIONAL DESCRIPTION
PIN DESCRIPTIONS
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The 3D3522 product family consists of monolithic CMOS Manchester RX Signal Input Decoders. The unit accepts at the RX input a bi-phase-level, CLK Signal Output (Clock) embedded-clock signal. In this encoding mode, a logic one is DATB Signal Output (Data) represented by a high-to-low transition within the bit cell, while a logic VDD +3.3 Volts zero is represented by a low-to-high transition. The recovered clock GND Ground and data signals are presented on CLK and DATB, respectively, with the data signal inverted. The operating baud rate (in MBaud) is specified by the dash number. The input baud rate may vary by as much as ±15% from the nominal device baud rate without compromising the integrity of the information received. Because the 3D3522 is not PLL-based, it does not require a long preamble in order to lock onto the received signal. Rather, the device requires at most one bit cell before the data presented at the output is valid. This is extremely useful in cases where the information arrives in bursts and the input is otherwise turned off. The all-CMOS 3D3522 integrated circuit has been designed as a reliable, economic alternative to hybrid Manchester Decoders. It is CMOS-compatible and is offered in standard 8-pin and 14-pin auto-insertable DIPs and space saving surface mount 8-pin and 14-pin SOICs.
TABLE 1: PART NUMBER SPECIFICATIONS
PART NUMBER
3D3522-0.5 3D3522-1 3D3522-5 3D3522-10 3D3522-20 3D3522-25 3D3522-50
BAUD RATE (MBaud) Nominal Minimum Maximum
0.50 1.00 5.00 10.00 20.00 25.00 50.00 0.43 0.85 4.25 8.50 17.00 21.25 42.50 0.57 1.15 5.75 11.50 23.00 28.75 57.50
NOTES: Any baud rate between 0.5 and 50 MBaud not shown is also available at no extra cost. 2006 Data Delay Devices
Doc #06005
5/8/2006
DATA DELAY DEVICES, INC.
3 Mt. Prospect Ave. Clifton, NJ 07013
1
3D3522
APPLICATION NOTES
The 3D3522 Manchester Decoder samples the input at precise pre-selected intervals to retrieve the data and to recover the clock from the received data stream. Its architecture comprises finely tuned delay elements and proprietary circuitry which, in conjunction with other circuits, implement the data decoding and clock recovery function.
OUTPUT SIGNAL CHARACTERISTICS
The 3D.