User guide

Getting Started with CapSense Document No. 001-64846 Rev. *A 61

6.4 Pin-to-Pin Compatibility

When migrating from one device to another, no PCB change is required if you assign the same pin functionality to the

new device. If this is the case, then the two devices are pin-to-pin compatible. Table 6-1 gives information about

available device packages and pin-to-pin compatibility between the same packages of CY8C20x34, CY8C21x34/B,

CY8C20xx6A and CY8C24x94 devices.

Table 6-1. Pin-to-Pin Compatibility

Package

Device

CY8C20x34 CY8C21x34/B CY8C20xx6A/H CY8C24x94

16 QFN

N -

16 SOIC

N N - -

24 QFN without USB

Y - Y -

28 SSOP

Y Y - -

30 WLCSP

N - N -

32 QFN without SMP

Y Y Y -

a. Pin 2 is different; CY8C20x34  P2[1], CY8C21x34/B  P2[3]. If Pin 2 is used, firmware has to be modified for migration.

b. Without USB

Symbols:

Y pin-to-pin compatible (same package dimensions)

N packages not pin-to-pin compatible

- package not available

For more details, see the "Pin Information” section of the respective datasheets.