CD40208- 4 x 4-bit synchronous triple-port register
Package DIP Series CD4000 (CMOS)
CD40208 overview
CD40208 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC's) constructed with N- and P-channel enhancement mode transistors. CD40208 has 4 x 4-bit synchronous triple-port register
CD40208 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
108833-ds.pdf
CD40208 features
- High Voltage Types (20V Rating)
- One Input and Two Output Buses
- Unlimited Expansion in Bit and Word Directions
- Data Lines have Latched Inputs
- 3-State Outputs
- Standard Symmetrical Output Characteristics
- 100% Tested for Maximum Quiescent Current at 20V
- 5V, 10V, and 15V Parametric Ratings
- Maximum Input Current of 1μA at 18V Over Full Package Temperature Range; 100nA at 18V and +25oC
- Noise Margin (Over Full Package Temperature Range):1V at VDD = 5V2V at VDD = 10V2.5V at VDD = 15V
- 1V at VDD = 5V
- 2V at VDD = 10V
- 2.5V at VDD = 15V
CD40208 pinout
| Pin | Name | Description |
|---|---|---|
| 1 | Q3B | Word Output Q3B |
| 2 | Q2B | Word Output Q2B |
| 3 | ENABLE A | Enable Pin A |
| 4 | Q0A | Word Output Q0A |
| 5 | Q1A | Word Output Q1A |
| 6 | Q2A | Word Output Q2A |
| 7 | Q3A | Word Output Q3A |
| 8 | WRITE 0 | Write Pin 0 |
| 9 | WRITE 1 | Write Pin 1 |
| 10 | READ 0B | Read Pin 0B |
| 11 | READ 1B | Read Pin 1B |
| 12 | VSS | Supply Voltage |
| 13 | READ 0A | Read Pin 0A |
| 14 | READ 1A | Read Pin 1A |
| 15 | WRITE ENABLE | Write Enable Pin |
| 16 | CLK | Clock Pin |
| 17 | D3 | Data Input 3 |
| 18 | D2 | Data Input 2 |
| 19 | D1 | Data Input 1 |
| 20 | D0 | Data Input 0 |
| 21 | ENABLE B | Enable Pin B |
| 22 | Q0B | Word Output Q0B |
| 23 | Q1B | Word Output Q1B |
| 24 | 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 |
CD40208 applications
- Scratch Pad Memories
- Arithmetic Units
- Data Storage
More about CD40208
Absolute Maximum Ratings
- Lead Temperature (During Soldering): +265oC
- At Distance 1/16 ± 1/32 Inch (1.59mm ± 0.79mm) from case for 10s Maximum
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