The SN65ELT21DGK is a differential PECL-to-TTL translator. It operates on +5-V supply and ground only. The device includes circuitry to maintain Q to a low logic level when inputs are in an open condition or < 1.3 V.
The VBB pin is a reference voltage output for the device. When the device is used in single-ended mode, the unused input should be tied to VBB. This reference voltage can also be used to bias the input when it is ac coupled.When it is used, place a 0.01μF decoupling capacitor between VCC and VBB. Also limit the sink/source current to < 0.5 mA to VBB. Leave VBB open when it is not used.
The SN65ELT21DGK is housed in an industry standard SOIC-8 package and is also available in an optional TSSOP-8 package.
Feature
- 3ns (TYP)Propagation Delay
- Operating Range: VCC = 4.2 V to 5.7 Vwith GND = 0 V
- 24-mA TTL Output
- Deterministic Output Value for Open Input Conditions or When Inputs < 1.3 V
- Built-In Temperature Compensation
- Drop-In Compatible to the MC10ELT21, MC100ELT21
- APPLICATIONS
- Data and Clock Transmission Over Backplane
- Signaling Level Conversion for Clock or Data
