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Texas Instruments SN74AVCA406DGG
- Part No.:
- SN74AVCA406DGG
- Manufacturer:
- Texas Instruments
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
SN74AVCA406DGG.pdf
- Description:
- IC VOLT TRANSL SD MMC 48TSSOP
- Quantity:
- Payment:
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Product details
Overview
SN74AVCA406 from Texas Instruments is a voltage-translation transceiver for memory card interfaces, supporting MMC, SD, Memory Stick, SmartMedia, and xD-Picture Card standards. It features dual-supply operation (1.4 V to 3.6 V on VCCA, VCCB0, and VCCB1), ±15-kV IEC 61000-4-2 air-gap ESD protection on B-port pins, and configurable mode selection via MODE0/MODE1 for 1-/4-/8-bit card protocols. It enables low-voltage microprocessors to interface with higher-voltage memory cards in portable electronics.
For engineers reviewing the SN74AVCA406 datasheet, SN74AVCA406 pinout, SN74AVCA406 application, or SN74AVCA406 equivalent, key selection considerations include its triple-supply voltage translation capability, memory-card-specific mode configuration logic, high-impedance A-port behavior when B-side supplies are off, and ball-grid array package layout constraints for multi-slot card support.
Technical Context
The SN74AVCA406 implements bidirectional level-shifting between A-port (microprocessor side) and B-port (memory card side) using independent supply rails: VCCA powers all A-port I/Os and controls, while VCCB0 and VCCB1 power separate subsets of B-port signals. Its MODE0/MODE1 pins configure interface behavior per Table 1 - e.g., MODE0=0/MODE1=X selects SD/SDIO/MMC/Memory Stick, while MODE0=1/MODE1=1 enables SmartMedia/xD-Picture Card mode.
ESD protection is asymmetric: ±15-kV air-gap and ±8-kV contact discharge per IEC 61000-4-2 apply only to B-port pins (card-facing), while A-port pins meet JESD22-A114-B (2000-V HBM) and JESD22-C101 (1000-V CDM). When VCCB0 and VCCB1 are both at GND (no card inserted), A-port outputs enter high-impedance state to minimize system leakage current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Function | Voltage-translation transceiver for memory card host interfaces - not a general-purpose level shifter. |
| Supply Range | VCCA, VCCB0, VCCB1 each support 1.4 V to 3.6 V; VCCB0/VCCB1 must be ≥ VCCA during operation. |
| ESD Protection | ±15 kV IEC 61000-4-2 air-gap on B-port pins (e.g., 1B–4B, 9B1, 10B1, 5B–8B, 9B2, 10B2, 11B, 12B, 14B). |
| Interface Modes | Configurable via MODE0/MODE1: SD/SDIO/MMC/Memory Stick (0,X), 8-bit MMC/4-bit+GPIO (1,0), SmartMedia/xD (1,1). |
| Output Types | 12A is push-pull; 14B is open-drain - except in NAND flash (xD) mode, where roles reverse (12A OD, 14B PP). |
| Package | 48-ball MicroStar Jr.™ VFBGA (DGG), 4 mm × 4 mm, 0.5-mm ball pitch, RoHS-compliant. |
Pinout & Package
SN74AVCA406 is housed in a 48-ball Very Thin Fine-Pitch Ball Grid Array (VFBGA) package designated DGG. The package measures 4 mm × 4 mm with 0.5-mm ball pitch and is optimized for space-constrained portable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCCA | A-port supply | Powers all A-port I/Os (1A–13A), control inputs (1DIR–4DIR, 56DIR, 78DIR, MODE0/MODE1, CS0/CS1), and internal logic. |
| VCCB0 | B-port supply subset 1 | Powers B-port pins 1B, 2B, 3B, 4B, 9B1, 10B1 - used for SD/SDIO/MMC/MS primary interface. |
| VCCB1 | B-port supply subset 2 | Powers B-port pins 5B, 6B, 7B, 8B, 9B2, 10B2, 11B, 12B, 14B - enables dual-slot or xD-Picture Card support. |
| 1A–13A | A-port bidirectional data/control | Host-side signals (e.g., DAT0.h, CMD.h, CLK.h); direction controlled by DIR pins referenced to VCCA. |
| 1B–14B | B-port bidirectional data/control | Card-side signals (e.g., DAT0, CMD, CLK, IRQ.h); ESD-hardened; voltage referenced to VCCB0 or VCCB1. |
| MODE0/MODE1 | Interface mode select | Digital inputs that configure protocol mapping per Table 1 - determines pin function assignment across memory standards. |
| CS0/CS1 | Card select control | Active-low enables Hi-Z state on associated A/B-port groups - supports dual-card slot arbitration. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent supply rails | Enables simultaneous interfacing of a 1.8-V host processor (VCCA) with 2.9-V SD card (VCCB0) and 3.3-V xD card (VCCB1) without external regulators. |
| Mode-configurable pin mapping | Single hardware design supports five memory standards via MODE0/MODE1 - eliminates need for multiple transceivers or FPGA glue logic. |
| Asymmetric ESD hardening | ±15-kV IEC 61000-4-2 protection only on B-port pins reduces die area/cost vs. full-device hardening, matching real-world card-insertion stress points. |
| Auto Hi-Z A-port shutdown | When VCCB0 = VCCB1 = GND (no card), A-port drivers disable automatically - prevents back-driving host I/Os and saves standby power. |
| Dual-slot interrupt support | 14B functions as open-drain IRQ.h output in dual-SDIO mode (Table 5), enabling shared interrupt line handling without external OR-gating. |
Applications
| SD/SDIO Card Interface | MMC & Memory Stick Support |
|---|---|
|
Use Scenario: Host processor (e.g., OMAP) connects to SD/SDIO card in 4-bit mode for high-speed data logging in digital cameras. IC Role / Device Role / Timing Role: Voltage-translating transceiver managing bidirectional DAT0–DAT3, CMD, CLK, and direction control signals between 1.8-V host and 2.9-V card. Use Value: Eliminates discrete ESD diodes and level-shifters; MODE0/MODE1 set to '0/X' configures correct pin mapping and timing alignment per SD Physical Layer spec. |
Use Scenario: PDA platform supports interchangeable MMC and Memory Stick cards via shared socket and controller firmware. IC Role / Device Role / Timing Role: Protocol-agnostic signal translator adapting host bus timing and voltage levels to either card's electrical interface requirements. Use Value: Reduces BOM count by consolidating two separate card-interface ICs into one; VCCB0/VCCB1 separation allows independent power sequencing per card type. |
| SmartMedia/xD-Picture Card | Dual-Slot SDIO + SD Card |
|
Use Scenario: Legacy industrial scanner uses SmartMedia for firmware updates and xD-Picture Card for image capture - both sharing same host controller. IC Role / Device Role / Timing Role: Mode-selectable transceiver configured via MODE0=1/MODE1=1 to route host signals to appropriate card pins with correct drive strength and slew rate. Use Value: Enables backward compatibility without redesigning PCB layout; 14B operates as push-pull output in xD mode for NAND command strobing. |
Use Scenario: Set-top box provides simultaneous SDIO Wi-Fi module (Slot 0) and SD memory card (Slot 1) via single host controller. IC Role / Device Role / Timing Role: Dual-supply transceiver arbitrating between two independent B-port domains using CS0/CS1 to isolate signal paths. Use Value: CS0/CS1 enable hardware-based slot selection - avoids software-controlled GPIO toggling delays and ensures clean signal isolation during hot-swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-translation transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74AVC4T245 | Quad-channel, dual-supply (1.2 V–3.6 V), no integrated ESD protection beyond JESD22, no MODE/CS logic. | Requires external ESD diodes and discrete mode control logic for multi-card support. | Choose when cost-sensitive designs use only one memory standard and can add discrete protection. |
| MAX3380E | SD/SDIO-specific transceiver with integrated ESD (±15 kV), but fixed 1.8-V/3.3-V supply pairing and no VCCB1 rail. | Lacks support for dual-slot or xD-Picture Card modes; limited to SD/SDIO/MMC only. | Prefer for SD-only systems needing guaranteed timing compliance and smaller footprint than SN74AVCA406. |
Compared with SN74AVCA406, SN74AVC4T245 offers lower channel count and no memory-card-specific logic, while MAX3380E provides tighter SD timing but sacrifices multimode flexibility and triple-supply scalability - making SN74AVCA406 optimal for multi-standard, multi-slot portable platforms.
Availability
SN74AVCA406 is available at Aetrix Electronics and suitable for digital cameras, PDAs, set-top boxes, and portable media players requiring stable component supply for memory card interface subsystems with long lifecycle support.
Supply support for SN74AVCA406 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and connectivity technologies, with leadership in interface and power management ICs for portable and industrial applications.
The SN74AVCA406 belongs to TI's AVCA logic family, designed specifically for high-reliability, multi-standard memory card interfacing in battery-powered devices where ESD robustness, supply flexibility, and board-space efficiency are critical.
FAQ
What memory card standards does the SN74AVCA406 support?
The SN74AVCA406 supports MultiMediaCard (MMC), Secure Digital (SD) and SDIO, Memory Stick™, SmartMedia, and xD-Picture Card™ standards. Configuration is achieved via MODE0 and MODE1 pins, which select the appropriate pin mapping and signal routing per Table 1 in the datasheet. The SN74AVCA406 does not support CompactFlash or USB-based memory cards.
How does the SN74AVCA406 handle power sequencing when no memory card is inserted?
When VCCB0 and VCCB1 are both at GND (indicating no card insertion), the SN74AVCA406 automatically places all A-port outputs in high-impedance state. This prevents back-driving the host processor's I/O lines and reduces static power consumption. The A-port remains fully functional once VCCB0 or VCCB1 is restored, with no reset or initialization sequence required for the SN74AVCA406.
Can the SN74AVCA406 interface with both 1.8-V and 3.3-V memory cards simultaneously?
Yes - the SN74AVCA406 supports simultaneous dual-voltage operation: VCCA can be set to 1.8 V (host side), VCCB0 to 2.9 V (e.g., SD card), and VCCB1 to 3.3 V (e.g., xD-Picture Card). This enables true concurrent support for mixed-voltage memory cards in dual-slot configurations, provided MODE0/MODE1 and CS0/CS1 are correctly asserted per Table 5.
What is the purpose of the 14B pin on the SN74AVCA406?
Pin 14B serves as an open-drain output in most modes (e.g., SD, MMC), but becomes a push-pull output in xD-Picture Card mode. In dual-SDIO configurations (Table 5), it functions as IRQ.h - an active-low interrupt output from Slot 1, allowing the host to detect card events without polling. Its drive strength and voltage reference follow VCCB1.
Is the SN74AVCA406 pin-compatible with other TI AVCA-series transceivers?
No - the SN74AVCA406 uses a unique 48-ball VFBGA (DGG) package with memory-card-specific pin assignments (e.g., dedicated MODE, CS, and dual VCCB rails). It is not pin-compatible with SN74AVC4T245 (16-pin TSSOP) or SN74AVC8T245 (24-pin TSSOP). Layout reuse requires full package and signal mapping validation for the SN74AVCA406.
SN74AVCA406DGG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- Packaging:
- Bulk
- Product Status:
- Active
- Translator Type:
- -
- Channel Type:
- -
- Number of Circuits:
- -
- Channels per Circuit:
- -
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- -
- Data Rate:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74AVCA406DGG FAQ
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7.What is the process for return or replacement of SN74AVCA406DGG?
All SN74AVCA406DGG units undergo pre-shipment inspection (PSI). If there is an issue with SN74AVCA406DGG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74AVCA406DGG part is unused and in its original packaging.
Return procedure for SN74AVCA406DGG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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