TMS3121

The TMS3121 is a quad 80-bit and 64-bit shift register with independent inputs, outputs, and recirculate control for each register. The feature of TMS3121 are as follows: (1)DC to 2.5-MHz operation; (2)static configuration; (3)single TTL-compatible clock; (4)inputs and outputs fully TTL-compatible; (5)push-pull output buffers; (6)on-chip recirculate logic; (7)power supplies: 5V, -12V; (8)low-threshold MOS techology.

The absolute maximum ratings of the TMS3121 are: (1)supply voltage, VGG: -20V to 0.3V; (2)clock input voltage: -20V to 0.3V; (3)data input voltage: -20V to 0.3V; (4)operating free-air temperature range: -25 to 85; (5)storage temperature range: -55 to 150.

The following is about the electrical characteristics of TMS3121: (1)high-level output voltage: VSS-1V min and VSS-0.5 at IOH = 100A; (2)low-level output voltage: 0.2V typical and 0.4V max at RL = IOL = 1.6mA; (3)input current: -0.1A at VI = 0; (4)supply current from VGG: -10mA typical and -15mA max at Load = 1 TTL gate, f = 1MHz, TA = 25; (5)supply current from VSS: 30mA typical and 35mA max at Load = 1 TTL gate, f = 1MHz, TA = 25; (6)power dissipation: 355mW max at Load = 1 TTL gate, f = 1MHz, TA = 25; (7)input capacitance, all inputs except clock: 3.5pF typical and 5pF max at VI = VSS, f= =1MHz; (8)clock input capacitance: 3.5pF typical and 5pF max at VI = VSS, f= =1MHz.