This paper describes the design and observed performance of a 2‐modulus prescaler MSI developed for a pulse‐swallowing variable frequency divider at 1 GHz. The output of the final stage is fed directly back to the first stage to achieve high‐speed operation. The operating speed is 1 GHz for a source voltage of 5 ± 0.5 V and ambient temperature from −40 to +85 C; the maximum speed is 1.3 GHz. The power consumption is 400 ‐ 450 mW. The frequency division ratio is 1/64 and 1/65. Series gate ECLs are used for the basic circuit and the logic amplitude is 0.5 V. The chip size is 1.78 × 2.08 mm2 and includes 285 transistors and 170 resistors. Transistors with emitter size of 3 × 5 μm2 and quality n‐type resistors are used in the high‐speed circuit.