CD4557-1-to-64 stage variable length shift register
Series CD4000 (CMOS)
CD4557 overview
CD4557 belongs to 4000 Series CMOS Logic Family of Integrated Circuits (IC's) constructed with N- and P-channel enhancement mode transistors.CD4557 has 1-to-64 stage variable length shift register
CD4557 has a supply voltage range of 5V to 20V, which is much higher than any contemporary logic family. It has buffered output which improves transfer characteristics by providing very high gain. All inputs are protected against static discharge with diodes to VDD and VSS.
Datasheet
hef4557bf.pdf
CD4557 features
- High-Voltage Types (20V Rating)
- Propagation Delay Time = 60ns (Typ.) at CL = 50pF, VDD = 10V
- Buffered Inputs and Outputs
- Standard Symmetrical Output Characteristics
- 100% Tested for Maximum Quiescent Current at 20V
- 5V, 10V, and 15V Parametric Ratings
CD4557 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | L2 | Bit-length control input 2 |
| 2 | L1 | Bit-length control input 1 |
| 3 | MR | Asynchronous Master Reset |
| 4 | CP0 | Clock Input |
| 5 | CP1' | Clock Enable Input |
| 6 | DB | Data Input B |
| 7 | DA | Data Input A |
| 8 | VSS | Supply Voltage |
| 9 | A/B' | Select Data Input |
| 10 | O | Buffered Output |
| 11 | O' | Invert Buffered Output |
| 12 | L32 | Bit-length control input 32 |
| 13 | L16 | Bit-length control input 16 |
| 14 | L8 | Bit-length control input 8 |
| 15 | L4 | Bit-length control input 4 |
| 16 | VDD | Drain Voltage |
Absolute maximum ratings
| Parameter | Value |
|---|---|
| DC Supply Voltage Range, (VDD) | -0.5V to +20V (Voltage Referenced to VSS Terminals) |
| Input Voltage Range, All Inputs | -0.5V to VDD +0.5V |
| DC Input Current, Any One Input | ±10mA |
| Operating Temperature Range | -55oC to +125oC Package Types D, F, K, H |
| Storage Temperature Range (TSTG) | -65oC to +150oC |
| Lead Temperature (During Soldering) | +265oC |
CD4557 applications
- The shift registers are used for temporary data storage.
- The shift registers are also used for data transfer and data manipulation.
CD4557 alternatives and equivalents
- CD4021
- CD4094
- CD4557-1
More about CD4557
Absolute Maximum Ratings
- Lead Temperature (During Soldering): +265oC
- At Distance 1/16 ± 1/32 Inch (1.59mm ± 0.79mm) from case for 10s Maximum
CD4557 Alternative Equivalent
CD4021, CD4094
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