component

CMT2157A-ESR

Public Made by Adom

by adom

HopeRF Micro-electronics RF Transceiver ICs, SOIC-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentrf & radiocmt2157a-esrfactory-2.0.0extractor-text

Verified CMT2157A-ESR

by Ray · last 5 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

5 Nov 2026RayPublished by the parts factory: tier lcsc, 14 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: CMT2157A-ESR · SOIC-14 · 14 pins
  • ✓copper: 14 copper pads, none touching another net
  • ✓datasheet: all 14 pin names found in the 31-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOIC-14_3.9x8.7mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-bnt5o8p3/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.27)
  • ✓pads: 14 pins = 14 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 14 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ cmt2157a-esr.kicad_sym✓ cmt2157a-esr.kicad_mod✓ cmt2157a-esr.step
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CMT2157A-ESR

HopeRF Micro-electronics · RF Transceiver ICs · SOIC-14

CMT2157A-ESR from HopeRF Micro-electronics, in a SOIC-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 LED output LED driver output, active low, which lights or flashes to indicate transmission and low battery detection, with drive current limited by the LED driving capability.
2 VDD power_in Power supply input; the recommended operating supply range is 1.8 to 3.6 V.
3 GND power_in Ground reference for the device.
4 RFO output Power amplifier output, with output power specified from -10 to +13 dBm.
5 K7 input Push button 7 input for the encoder; the device supports up to 7 configurable push-button data pins.
6 K6 input Push button 6 input for the encoder; the device supports up to 7 configurable push-button data pins.
7 K5 input Push button 5 input for the encoder; the device supports up to 7 configurable push-button data pins.
8 K4 input Push button 4 input for the encoder; the device supports up to 7 configurable push-button data pins.
9 K3 input Push button 3 input for the encoder; the device supports up to 7 configurable push-button data pins.
10 K2 input Push button 2 input for the encoder; the device supports up to 7 configurable push-button data pins.
11 K1 input Push button 1 input for the encoder; the device supports up to 7 configurable push-button data pins.
12 DATA bidirectional Data pin to access the embedded EEPROM, internally pulled up to VDD.
13 CLK input Clock pin to access the embedded EEPROM, internally pulled up to VDD.
14 XTAL input 26 MHz single-ended crystal oscillator input or external 26 MHz reference clock input, which requires a coupling capacitor and 0.3 to 0.7 Vpp amplitude when driven externally.

Key specifications

Parameter Value
Manufacturer HopeRF Micro-electronics
Package SOIC-14
Category RF & Radio
Pins 14

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Operation Voltage Supply VDD 1.8 3.6 V 5
Operation Temperature TOP -40 85 ℃ 5
Supply Voltage VDD -0.3 3.6 V 5
Interface Voltage VIN -0.3 V 5
Junction Temperature TJ -40 125 ℃ 5
Storage Temperature TSTG -50 150 ℃ 5
ESD Rating Human Body Model (HBM) -2 2 kV 5
Latch-up Current -100 100 mA @ 85 ℃ 5
Frequency Range FRF 240 960 MHz 6
Symbol Rate FSK/GFSK SR 0.5 100 ksps 6
Symbol Rate OOK SR 0.5 40 ksps 6
(G)FSK Modulation Deviation Range FDEV 1 200 kHz 6
Maximum Output Power POUT(Max) 13 dBm 6
Minimum Output Power POUT(Min) -10 dBm 6
PA Ramping Time tRAMP 0 1024 us 6
Sleep Current ISLEEP 20 nA 1
Crystal Frequency FXTAL 26 26 26 MHz 7
Crystal Tolerance -20 20 ppm 7
Load Capacitance CLOAD 12 20 pF 7

CAD (KiCad official)

  • Symbol: CMT2157A-ESR
  • Footprint: Package_SO:SOIC-14_3.9x8.7mm_P1.27mm
  • 3D model: SOIC-14 (KiCad packages3D, STEP)
  • 3D model files: cmt2157a-esr-etched.step / cmt2157a-esr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cmt2157a-esr.step / cmt2157a-esr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: HopeRF Micro-electronics datasheet (31 pp, sha256 687441d9010dcd89, retrieved 2026-11-05, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF