HT7038 from HiTrend Tech Shanghai, in a LQFP-32(7x7). 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	V1P	input	Channel 1 (current channel) positive analog input. Fully differential, normal max signal ±0.7Vp. Channel 1 has an internal PGA; ESD protection integrated.
2	V1N	input	Channel 1 (current channel) negative analog input. Fully differential with V1P, ±0.7Vp full-scale, internal PGA and ESD protection.
3	REFCAP	output	Internal 1.2V voltage reference output; may be driven by an external reference. Decouple with 10µF in parallel with 0.1µF ceramic to AGND.
4	V3P	input	Channel 3 (current channel) positive analog input. Fully differential, ±0.7Vp full-scale, integrated PGA and ESD protection.
5	V3N	input	Channel 3 (current channel) negative analog input; pairs with V3P as differential input.
6	AGND	power_in	Analog ground reference for the ADC and voltage reference. Tie to the analog ground plane on the PCB.
7	V5P	input	Channel 5 (current channel) positive analog input. Fully differential, ±0.7Vp full-scale, PGA and ESD protection.
8	V5N	input	Channel 5 (current channel) negative analog input; pairs with V5P differentially.
9	AGND	power_in	Analog ground reference (shared with pins 6/13).
10	AVCC	power_in	Analog 3.3V ±10% supply. Decouple with 10µF in parallel with 0.1µF ceramic close to the pin.
11	V2P	input	Channel 2 (voltage channel) positive analog input. Max input ~0.7Vp differential; ESD protection on both pins.
12	V2N	input	Channel 2 (voltage channel) negative analog input.
13	AGND	power_in	Analog ground reference (shared with pins 6/9).
14	V4P	input	Channel 4 (voltage channel) positive analog input. Differential ±0.7Vp, ESD protected.
15	V4N	input	Channel 4 (voltage channel) negative analog input.
16	AVCC	power_in	Analog 3.3V ±10% supply (shared with pin 10). Decouple with 10µF
17	V6P	input	Channel 6 (voltage channel) positive analog input. Differential ±0.7Vp, ESD protected.
18	V6N	input	Channel 6 (voltage channel) negative analog input.
19	GND	power_in	Digital ground reference. Tie to the digital ground plane.
20	CF1	output	Frequency calibration output (high-level pulse) used for active-power calibration; can also drive an active-energy pulse counter.
21	CF2	output	Frequency calibration output (high-level pulse) used for reactive-power calibration; can also drive a reactive-energy pulse counter.
22	SLEEP	input	Sleep-mode control pin, active high. Drive high to enter sleep (≈1µA). Drive low to resume normal operation.
23	GND	power_in	Digital ground reference (shared with pin 19).
24	VCC	power_in	Digital supply, 3.3V ±5%. Decouple with 10µF in parallel with 100nF ceramic close to the pin.
25	CS	input	SPI chip select from host MCU, active low. When CS is high, DOUT is high-impedance. Schmitt-trigger input with internally programmable 300kΩ pull-up (or floating).
26	SCLK	input	SPI serial clock from the host MCU. Schmitt-trigger input for opto-isolator compatibility; internally programmable 300kΩ pull-up or floating.
27	DIN	input	SPI serial data input (MOSI) from host MCU. Data is latched on the SCLK falling edge. Schmitt-trigger input with programmable 300kΩ pull-up or floating.
28	DOUT	tri_state	SPI serial data output (MISO). Data changes on SCLK rising edge, valid on falling edge. High-Z when CS is high.
29	VDD	power_out	Internal 1.8V digital core LDO output. Decouple externally with 10µF in parallel with 100nF ceramic; do not use as an external supply rail.
30	OSCI	input	Crystal oscillator input or external clock input (recommended 5.5296 MHz). Internal 10MΩ feedback resistor for crystal biasing.
31	OSCO	output	Crystal oscillator output. Connects to the second terminal of the 5.5296 MHz crystal.
32	RESET	input	External reset input, active low. Schmitt-trigger with internal 47kΩ pull-up. A low pulse >20µs triggers a hardware reset.

Key specifications

Parameter	Value
Manufacturer	HiTrend Tech Shanghai
Package	LQFP-32(7x7)
Category	Data Acquisition
Pins	32

CAD (KiCad official)

Symbol: HT7038
Footprint: Package_QFP:LQFP-32_7x7mm_P0.8mm
3D model: LQFP-32(7x7) (KiCad packages3D, STEP)

Provenance

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

Datasheet: HiTrend Tech Shanghai datasheet (53 pp, sha256 514b488db76cb685, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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