AT42QT2120 Datasheet
Table Of Contents
- Features
- 1. Pinouts and Schematics
- 2. Overview
- 3. Wiring and Parts
- 4. I2C-compatible Communications (Comms Mode Only)
- 5. Setups
- 5.1 Introduction
- 5.2 Address 0: Chip ID
- 5.3 Address 1: Firmware Version
- 5.4 Address 2: Detection Status
- 5.5 Addresses 3 – 4: Key Status
- 5.6 Address 5: Slider Position
- 5.7 Address 6: Calibrate
- 5.8 Address 7: Reset
- 5.9 Address 8: Low Power (LP) Mode
- 5.10 Address 9 – 10: Toward Touch and Away from Touch Drift (TTD, ATD)
- 5.11 Address 11: Detection Integrator (DI)
- 5.12 Address 12: Touch Recal Delay (TRD)
- 5.13 Address 13: Drift Hold Time (DHT)
- 5.14 Address 14: Slider Options
- 5.15 Address 15: Charge Time
- 5.16 Address 16 – 27: Detect Threshold (DTHR)
- 5.17 Addresses 28 – 39: Key Control
- 5.18 Addresses 40 – 51: Pulse/Scale for Keys
- 5.19 Address 52 – 75: Key Signal
- 5.20 Address 76 – 99: Reference Data
- 6. Specifications
- Appendix A. I2C-compatible Operation
- Associated Documents
- Revision History
35
9634E–AT42–06/12
AT42QT2120
6.6.2 AT42QT2120-XU – 20-pin TSSOP
2325 Orchard Parkway
San Jose, CA 95131
TITLE
DRAWING NO.
R
REV.
20X, (Formerly 20T), 20-lead, 4.4 mm Body Width,
Plastic Thin Shrink Small Outline Package (TSSOP)
C
20X
10/23/03
6.60 (.260)
6.40 (.252)
1.20 (0.047) MAX
0.65 (.0256) BSC
0.20 (0.008)
0.09 (0.004)
0.15 (0.006)
0.05 (0.002)
INDEX MARK
6.50 (0.256)
6.25 (0.246)
SEATING
PLANE
4.50 (0.177)
4.30 (0.169)
PIN
1
0.75 (0.030)
0.45 (0.018)
0º ~ 8º
0.30 (0.012)
0.19 (0.007)
Dimensions in Millimeters and (Inches).
Controlling dimension: Millimeters.
JEDEC Standard MO-153 AC