FE2.1 Datasheet Review
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FE2.1 QFP48 Datasheet Review
Date: 2026-07-14 Reviewed the published part project FE2.1_QFP against available FE2.1 QFP48 information. The requested direct schematic cha...
Completed: I added the official Terminus Product Brief URL, applied pin orientation/section/terminal order to all 48 terminals without changing pin numbers or remapping pins, and created the full review in FE2.1 QFP48 Datasheet Review.
Open items:
- MPN is still
FE2.1_QFP; datasheet order codes areFE2.1-CQFP48A/AT/ATR. - Package is still generic
QFP; datasheet package is 48-pin LQFP 7×7 mm. - Pin Type and Pin Description remain unmodified per your instruction.
Suggested next steps:
- Update MPN/package metadata to the exact orderable variant.
- Add datasheet-backed Pin Type and Pin Description properties.
- Replace the Product Brief URL if you have an official full Terminus datasheet PDF.
Fix metadata and pins
Update exact variant
Add pin properties
Run component review
Check footprint details
Refine this doc
Ask about this doc
FE2.1 QFP48 Datasheet Review
Date: 2026-07-14
Scope
Reviewed the published part project
FE2.1_QFP against available FE2.1 QFP48 information. The requested direct schematic changes were limited to assigning Pin Orientation, Section, and Terminal Order; pin numbers and pin names/designators were not replaced or remapped.Sources Used
- Official Terminus public document added to the part:
https://www.terminus-tech.com/static/doc/FE2.1%20Product%20Brief%20%28Rev.%202.0%29.pdf - Full QFP48 pin/package evidence from distributor/mirror datasheet data for Terminus Tech
FE2.1-CQFP48A / FE2.1-CQFP48AT / FE2.1-CQFP48ATR. - Project inspection: schematic terminals, project properties, and default footprint data.
Important note: the official Terminus-hosted public URL found during web search is a Product Brief, not the full datasheet. Full pin table/package details were available from LCSC/datasheet mirror copies and were used only for cross-checking.
Existing Part Metadata
Table
| Field | Project value | Datasheet / source value | Result |
|---|---|---|---|
| Manufacturer Part Number | FE2.1_QFP | Order codes include FE2.1-CQFP48A, FE2.1-CQFP48AT, FE2.1-CQFP48ATR | Mismatch / incomplete MPN. Project name is a generic variant label rather than a manufacturer order code. |
| Manufacturer | Terminus Technology | Terminus Tech / Terminus Technology | Match |
| Description | USB 2.0 HIGH SPEED 7-PORT HUB CONTROLLER | USB 2.0 7-Port MTT Hub Controller | Match |
| Package or Case Code | QFP | 48-pin LQFP, 7 mm x 7 mm body | Mismatch / too generic. Prefer 48-LQFP or LQFP-48_7x7mm. |
| Pin count | 48 pads / 48 terminals | 48-pin LQFP | Match |
| Datasheet URL | Added official Product Brief URL | Official public Terminus Product Brief Rev. 2.0 | Updated |
Key Datasheet Specs
- Function: USB 2.0 High-Speed 7-port hub controller with MTT architecture.
- USB: Upstream supports High-Speed 480 Mb/s and Full-Speed 12 Mb/s; downstream ports support High-Speed, Full-Speed, and Low-Speed 1.5 Mb/s.
- Supplies: VDD5 4.5-5.5 V, VD33 3.0-3.6 V, VD18/VD_PLL 1.62-1.98 V.
- Typical current: 155 mA with seven downstream ports active in High-Speed mode; 600 uA suspend current.
- Clock: 12 MHz crystal oscillator input/output, internal oscillator feedback/load support per datasheet.
- Required externals noted in pin table: 10 uF on VD33_O, 10 uF on VD18_O, 2.7 kOhm ±1% from REXT to VSS.
- Package: 48-pin LQFP, 7 x 7 mm body, 0.50 mm pitch, nominal 9 x 9 mm lead span, max height about 1.7 mm.
Pin Cross-Check and Applied Assignments
All 48 pin numbers match the FE2.1 48-pin LQFP datasheet pin assignment. Duplicate supply/ground pins use unique project terminal names with suffixes, which is acceptable for Flux uniqueness but differs from the repeated datasheet net names.
Table
| Pin No. | Project terminal | Datasheet signal | Datasheet function summary | Applied section | Orientation | Terminal order | Notes |
|---|---|---|---|---|---|---|---|
| 1 | DRV | DRV | LED drive control output | Output | right | 21 | Match |
| 2 | TESTJ | TESTJ | Test mode active-low during reset; EEPROM SDA alternate | Control | left | 16 | Match |
| 3 | LED[1] | LED[1] | Port 1 LED / EEPROM SCL alternate | Digital | right | 23 | Match |
| 4 | LED[2] | LED[2] | Port 2 LED / non-removable config bit 0 | Digital | right | 24 | Match |
| 5 | LED[3] | LED[3] | Port 3 LED / non-removable config bit 1 | Digital | right | 25 | Match |
| 6 | VD18_1 | VD18 | 1.8 V power input | Power | top | 10 | Name suffix differs only for uniqueness |
| 7 | LED[4] | LED[4] | Port 4 LED / non-removable config bit 2 | Digital | right | 26 | Match |
| 8 | VDD5 | VDD5 | 5 V input for integrated regulator | Power | top | 1 | Match |
| 9 | VD33_O | VD33_O | 3.3 V regulator output, requires 10 uF | Power | top | 2 | Match |
| 10 | VSS_1 | VSS | Ground | Ground | bottom | 46 | Name suffix differs only for uniqueness |
| 11 | DM4 | DM4 | Downstream port 4 D- | Interface | left | 38 | Match |
| 12 | DP4 | DP4 | Downstream port 4 D+ | Interface | left | 39 | Match |
| 13 | DM3 | DM3 | Downstream port 3 D- | Interface | left | 36 | Match |
| 14 | DP3 | DP3 | Downstream port 3 D+ | Interface | left | 37 | Match |
| 15 | VD33_1 | VD33 | 3.3 V power input | Power | top | 3 | Name suffix differs only for uniqueness |
| 16 | DM2 | DM2 | Downstream port 2 D- | Interface | left | 34 | Match |
| 17 | DP2 | DP2 | Downstream port 2 D+ | Interface | left | 35 | Match |
| 18 | DM1 | DM1 | Downstream port 1 D- | Interface | left | 32 | Match |
| 19 | DP1 | DP1 | Downstream port 1 D+ | Interface | left | 33 | Match |
| 20 | VD33_2 | VD33 | 3.3 V power input | Power | top | 4 | Name suffix differs only for uniqueness |
| 21 | VD_PLL | VD_PLL | 1.8 V PLL power | Power | top | 9 | Match |
| 22 | XIN | XIN | 12 MHz crystal oscillator input | Analog | left | 14 | Match |
| 23 | XOUT | XOUT | 12 MHz crystal oscillator output | Analog | left | 15 | Match |
| 24 | VS_PLL | VS_PLL | PLL ground | Ground | bottom | 48 | Match |
| 25 | VD18_O | VD18_O | 1.8 V regulator output, requires 10 uF | Power | top | 12 | Match |
| 26 | VD33_3 | VD33 | 3.3 V power input | Power | top | 5 | Name suffix differs only for uniqueness |
| 27 | REXT | REXT | 2.7 kOhm ±1% to VSS for bias reference | Analog | left | 13 | Match |
| 28 | VD18_2 | VD18 | 1.8 V power input | Power | top | 11 | Name suffix differs only for uniqueness |
| 29 | DMU | DMU | Upstream port D- | Interface | left | 30 | Match |
| 30 | DPU | DPU | Upstream port D+ | Interface | left | 31 | Match |
| 31 | VD33_4 | VD33 | 3.3 V power input | Power | top | 6 | Name suffix differs only for uniqueness |
| 32 | DM5 | DM5 | Downstream port 5 D- | Interface | right | 40 | Match |
| 33 | DP5 | DP5 | Downstream port 5 D+ | Interface | right | 41 | Match |
| 34 | DM6 | DM6 | Downstream port 6 D- | Interface | right | 42 | Match |
| 35 | DP6 | DP6 | Downstream port 6 D+ | Interface | right | 43 | Match |
| 36 | VD33_5 | VD33 | 3.3 V power input | Power | top | 7 | Name suffix differs only for uniqueness |
| 37 | DM7 | DM7 | Downstream port 7 D- | Interface | right | 44 | Match |
| 38 | DP7 | DP7 | Downstream port 7 D+ | Interface | right | 45 | Match |
| 39 | VSS_2 | VSS | Ground | Ground | bottom | 47 | Name suffix differs only for uniqueness |
| 40 | XRSTJ | XRSTJ | External reset, active low | Control | left | 17 | Match |
| 41 | VBUSM | VBUSM | Upstream VBUS monitor input | Input | left | 18 | Match |
| 42 | VD33_6 | VD33 | 3.3 V power input | Power | top | 8 | Name suffix differs only for uniqueness |
| 43 | OVCJ5 | OVCJ[5] | Port 5 over-current detect, active low | Input | left | 20 | Bracket notation differs only |
| 44 | PWRJ | PWRJ[1] | Port 1 power enable, active low, open drain | Output | right | 22 | Project omits [1] suffix |
| 45 | OVCJ1 | OVCJ[1] | Port 1 over-current detect, active low | Input | left | 19 | Bracket notation differs only |
| 46 | LED[7] | LED[7] | Port 7 LED / number-of-ports config bit 0 | Digital | right | 29 | Match |
| 47 | LED[6] | LED[6] | Port 6 LED / number-of-ports config bit 1 | Digital | right | 28 | Match |
| 48 | LED[5] | LED[5] | Port 5 LED | Digital | right | 27 | Match |
Footprint Cross-Check
- Footprint asset name:
QFP50P900X900X160-48N.kicad_mod. - Footprint description:
48-PIN LQFP. - Pads: 48 SMD rectangular pads.
- Pad pitch: 0.50 mm, derived from pad center spacing.
- Body/fab outline: 7.0 mm x 7.0 mm.
- Lead span: approximately 9.0 mm nominal from pad row geometry / footprint naming.
- Pad size: 0.30 mm x 1.475 mm.
- Pin-1 marker is present near the pin-1 corner.
Result: The footprint is broadly consistent with the datasheet's 48-pin LQFP, 7 x 7 mm, 0.50 mm pitch package. The exact Terminus recommended land pattern was not found in the official Product Brief, so pad length/land-pattern details should be treated as a standard LQFP48 land pattern rather than an official Terminus-confirmed footprint.
Mismatches / Issues Flagged
Manufacturer Part Numberis set toFE2.1_QFP, while datasheet order codes for the 48-pin package areFE2.1-CQFP48A,FE2.1-CQFP48AT, andFE2.1-CQFP48ATR.Package or Case Codeis set to genericQFP; datasheet package is specifically 48-pin LQFP, 7 x 7 mm body.- All terminal
Pin Typeproperties remainUnspecified; the datasheet provides electrical types such as P, O, I, I-PU, IO-PU, OD, A, OSC, UTU, and UTD. These were not changed because the latest instruction limited edits to orientation, section, and terminal order. - Pin descriptions are not populated as project
Pin Descriptionproperties. The datasheet descriptions are summarized in this report, but not applied because the latest instruction limited edits to orientation, section, and terminal order. - Duplicate supply/ground pins use suffixes such as
_1,_2, etc. This preserves unique terminal designators but differs from the repeated datasheet signal names. - The official URL available publicly from Terminus is a Product Brief; full pin/package data came from distributor/mirror datasheet sources.
Changes Applied
- Added project
Datasheet URLwith the official Terminus FE2.1 Product Brief URL. - Added/updated
Pin Orientation,Section, andTerminal Orderon all 48 schematic terminals. - Did not replace terminals, change pin numbers, or remap pins.
Suggested Follow-Up
- If exact sourcing matters, update the project MPN to the specific order code being used, for example
FE2.1-CQFP48A. - Update
Package or Case Codeto a more specific value such as48-LQFPorLQFP-48_7x7mm. - If desired, perform a second controlled edit pass to add
Pin DescriptionandPin Typeproperties from the datasheet. - If the manufacturer provides an official full datasheet PDF, replace or supplement the current Product Brief URL with that official full datasheet URL.
Scope
Sources Used
Existing Part Metadata
Key Datasheet Specs
Pin Cross-Check and Applied Assignments
Footprint Cross-Check
Mismatches / Issues Flagged
Changes Applied
Suggested Follow-Up
