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| Part Number | LM4549BVH/NOPB | LM4549BVHX/NOPB | LM4546BVH/NOPB | 
|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | National Semiconductor | 
| Product Status | Active | Active | Active | 
| Type | Audio, AC '97 | Audio, AC '97 | Audio, AC '97 | 
| Data Interface | Serial | Serial | Serial | 
| Resolution (Bits) | 18 b | 18 b | 18 b | 
| Number of ADCs / DACs | 2 / 2 | 2 / 2 | 2 / 2 | 
| Sigma Delta | Yes | Yes | Yes | 
| S/N Ratio, ADCs / DACs (db) Typ | - | - | - | 
| Dynamic Range, ADCs / DACs (db) Typ | 90 / 89 | 90 / 89 | 90 / 89 | 
| Voltage - Supply, Analog | 4.2V ~ 5.5V | 4.2V ~ 5.5V | 4.2V ~ 5.5V | 
| Voltage - Supply, Digital | 3.3V ~ 5.5V | 3.3V ~ 5.5V | 3V ~ 5.5V | 
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | 
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | 
| Package / Case | 48-LQFP | 48-LQFP | 48-LQFP | 
| Supplier Device Package | 48-LQFP (7x7) | 48-LQFP (7x7) | 48-LQFP (7x7) |