| Parameters | 
                                                                                                            
                                            | Factory Lead Time | 13 Weeks | 
                                                                            
                                            | Mounting Type | Through Hole | 
                                                                            
                                            | Package / Case | 28-CDIP (0.600, 15.24mm) | 
                                                                            
                                            | Supplier Device Package | 28-CerDip | 
                                                                            
                                            | Operating Temperature | -55°C~125°C | 
                                                                            
                                            | Packaging | Tube | 
                                                                            
                                            | Series | 7200 | 
                                                                            
                                            | Part Status | Active | 
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 
                                                                            
                                            | Voltage - Supply | 4.5V~5.5V | 
                                                                            
                                            | Base Part Number | 7203 | 
                                                                            
                                            | Function | Asynchronous | 
                                                                            
                                            | Current - Supply (Max) | 150mA | 
                                                                            
                                            | Memory Size | 18K 2K x 9 | 
                                                                            
                                            | Access Time | 40ns | 
                                                                            
                                            | Data Rate | 20MHz | 
                                                                            
                                            | Bus Directional | Uni-Directional | 
                                                                            
                                            | Retransmit Capability | Yes | 
                                                                            
                                            | FWFT Support | No | 
                                                                            
                                            | Programmable Flags Support | No | 
                                                                            
                                            | Expansion Type | Depth, Width | 
                                                                            
                                            | RoHS Status | Non-RoHS Compliant | 
                                                                                                    
                            
                         
                                                7203L40DB Overview
You can find FIFO memory chip in the 28-CDIP (0.600, 15.24mm) package.In the shape of a Tube , it's packaged.In addition to storing applications and data, the FIFO chips have a memory of 18K 2K x 9 .It is recommended that the temperature of the system be regulated to -55°C~125°C for reliable operation.Through Hole is the mounting type of the FIFO memory.A voltage supply of 4.5V~5.5V is needed to operate it.The 7200 series comprises this memory logic.There is a maximum operating current of 150mA in memory IC's supply.I believe it belongs to the 7203 family of numbers.
7203L40DB Features
18K 2K x 9 memory size
7200 series
Best part number of 7203
7203L40DB Applications
There are a lot of Renesas Electronics America Inc. 7203L40DB  FIFOs Memory applications. 
- Telecommunication
- Test site
- Computers
- Consumer Systems
- Communications
- Application that requires re-writable nonvolatile parameter memory
- Buses 
- Video time base correction
- Temporary storage elements
- SPI Bus Flash Memory Devices