SOCS024B - FEBRUARY 1991
The SN28846 serial driver is a monolithic CMOS integrated circuit designed to drive the serial register gate (SRGn) and transfer gate (TRG) inputs of the Texas Instruments virtual-phase CCD image sensors. The SN28846 interfaces a user-defined timing generator to the CCD image sensor; it receives TTL signals from the timing generator and outputs level-shifted signals to the image sensor. The SN28846 contains three noninverting serial-gate drivers and one noninverting transfer-gate driver.
The voltage levels on outputs SRG1OUT, SRG2OUT, SRG3OUT, and TRGOUT are controlled by the levels on the two dc supply inputs VSS and VCC. The propagation delays for these outputs are controlled by the SEL0 and SEL1 inputs. The inputs PD\, SRG1IN, SRG2IN, SRG3IN, and TRGIN are TTL compatible.
A high level on the PD\ input allows the SN28846 to operate normally with the level-shifted outputs following the inputs. When PD\ is low, the device is in a low-power-consumption mode and all outputs are at VCC.
The SN28846 is available in the DW surface-mount package and is characterized for operation from -20°C to 45°C.
This device contains circuits to protect its inputs and outputs against damage due to high static voltages or electrostatic fields. These circuits have been qualified to protect this device against electrostatic discharges (ESD) of up to 2 kV according to MIL-STD-883C, Method 3015; however, precautions should be taken to avoid application of any voltage higher than maximum-rated voltages to these high-impedance circuits. During storage or handling, the device leads should be shorted together or the device should be placed in conductive foam. In a circuit, unused inputs should always be connected to an appropriated logic voltage level, preferably either VCC or ground. Specific guidelines for handling devices of this type are contained in the publication Guidelines for Handling Electrostatic-Discharge-Sensitive (ESDS) Devices and Assemblies available from Texas Instruments.
View more information about generic part numbers:SN28846
Go to the Engineering Design Center to locate information on other TI Semiconductor devices.