HG9200AM from HGSEMI, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	CE	input	Chip enable, active low. CMOS input with internal pull-high resistor. When CE is pulled low, the oscillator starts and the DTMF signal is transmitted from the DTMF pin.
2	X2	output	Oscillator output. Together with X1 forms the 3.579545 MHz crystal oscillator using an on-chip inverter, bias resistor, and load capacitance.
3	X1	input	Oscillator input. Connect a standard 3.579545 MHz crystal between X1 and X2 to implement the system clock. Internal ~10 MΩ feedback bias resistor and integrated load capacitors (~20 pF / ~10 pF).
4	VSS	power_in	Negative power supply / ground reference. Tie to system ground (0 V).
5	CLK	input	Data synchronous clock input for serial mode. CMOS input with internal pull-high resistor. Serial data on DATA is latched on the falling edge of CLK. Max clock rate 500 kHz (typ 100 kHz).
6	DATA	input	Serial data input. CMOS input with internal pull-high resistor. Each DTMF digit is selected by a 5-bit serial code (D0 = LSB, D4 = MSB) clocked in on CLK falling edges.
7	DTMF	output	DTMF signal output. CMOS analog output; typical AC level 0.15 Vrms into 5 kΩ load. DC level 0.45·VDD to 0.75·VDD. Drives external audio/telephone line interface.
8	VDD	power_in	Positive power supply. Operating range 2.0 V to 5.5 V. Absolute maximum 6 V. Typical operating current 240 µA at 2.5 V, 950 µA at 5.0 V; standby current ≤2 µA.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOP-8
Category	Interface
Pins	8

Ordering variants

Same part, different packaging or reel option.

HG9200AMM/TR
HG9200AMM
HG9200AMN
HG9200AMBM/TR

CAD (KiCad official)

Symbol: HG9200AM
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: HGSEMI datasheet (12 pp, sha256 e155baa26afbb02c, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF