The TC9402EJD from Microchip Technology is a voltage-to-frequency and frequency-to-voltage converter Integrated Circuit rated at 100 kHz with ±0.25% accuracy, in a 14-CERDIP package.
The TC9402CPD from Microchip Technology is a voltage-to-frequency and frequency-to-voltage converter Integrated Circuit rated at 100 kHz with ±0.25%, in a 14-PDIP package.