74ALVCHR16269AVRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The 74ALVCHR16269AVRE4 is a 12-bit to 24-bit registered bus exchanger from Texas Instruments in the ALVC logic family. It supports bidirectional data exchange with active-low enable control and operates from 1.65 V to 3.3 V supply at 50 pF load. Packaged in a 56-pin SSOP for high-density data bus designs.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 56
- Lifecycle
- OBSOLETE
- Datasheet
- 74ALVCHR16269AVRE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 74ALVCHR16269AVRE4?
- 12-to-24-bit registered bus exchange function enabling data width conversion and bus bridging in a single IC
- ALVC low-voltage CMOS technology operating from 1.65 V to 3.3 V for modern low-power system buses
- Bidirectional data path with active-low enable control supporting flexible bus master arbitration
- Registered output architecture with integrated flip-flops for synchronous data capture at both bus ports
- 56-pin SSOP package (R-PDSO-G56) providing high pin count in a compact SMD footprint for dense PCB layouts
What is 74ALVCHR16269AVRE4 used for?
The 74ALVCHR16269AVRE4 is used in CPU-to-memory bus interfaces, multi-processor backplane interconnects, and FPGA I/O expansion designs that require registered bidirectional data exchange between buses of differing widths. Its 1.65 V to 3.3 V operation makes it compatible with modern DDR3 and LPDDR memory bus voltages, supporting width-conversion between 12-bit and 24-bit data paths in digital signal processor and communications chipset designs. The registered exchanger architecture also supports pipelined bus designs in network switch and storage controller ASICs.
What are the specifications of 74ALVCHR16269AVRE4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | BIDIRECTIONAL |
| Family | ALVC/VCX/A |
| JESD-30 Code | R-PDSO-G56 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS EXCHANGER |
| Number of Bits | 12 |
| Number of Functions | 1 |
| Number of Ports | 3 |
| Output Characteristics | 3-STATE WITH SERIES RESISTOR |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP56,.25,16 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Power Supply Current-Max (ICC) | 0.04mA |
| Prop. Delay@Nom-Sup | 7.7ns |
| Propagation Delay (tpd) | 7.7ns |
| Qualification Status | Not Qualified |
| Screening Level | AEC-Q100; TS 16949 |
| Supply Voltage-Max (Vsup) | 3.6V |
| Supply Voltage-Min (Vsup) | 1.65V |
| Supply Voltage-Nom (Vsup) | 1.8V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.4mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the 74ALVCHR16269AVRE4 datasheet?
74ALVCHR16269AVRE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for 74ALVCHR16269AVRE4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does 74ALVCHR16269AVRE4 handle data width conversion between a 12-bit and 24-bit bus in a processor design?
The device's bus exchanger function allows transparent or registered mapping of 12-bit data on one port to selected bits on the 24-bit port, controlled by configuration pins. In a processor memory controller requiring 24-bit-wide SRAM but outputting 12-bit data words, the 74ALVCHR16269 can be configured to latch and re-drive the expanded bus, eliminating separate latch and buffer ICs and reducing signal propagation delay by approximately 2 ns compared to discrete solutions.
At what supply voltage does 74ALVCHR16269AVRE4 operate and how does it interface with 2.5 V DDR bus signals?
74ALVCHR16269AVRE4 operates from 1.65 V to 3.3 V Vcc. At a 2.5 V supply, its input thresholds (V_IH approximately 1.7 V, V_IL approximately 0.7 V) are compatible with 2.5 V DDR-bus voltage swings. The 50 pF rated load capacitance means outputs maintain valid ALVC switching speeds below 3 ns propagation delay at typical 2.5 V bus trace capacitances found on standard 4-layer PCB routing.
For a 56-pin SSOP PCB layout, how should the enable control pins of 74ALVCHR16269AVRE4 be routed to prevent bus contention?
The active-low output enable pins must be driven by dedicated decoded control signals from the bus master or FPGA GPIO, with pull-up resistors of 10 kOhm to Vcc ensuring disabled state during power-up before firmware initializes the bus controller. Traces from the enable pins to the control source should be kept below 50 mm to minimize propagation skew, and a 100 nF decoupling capacitor placed within 5 mm of the Vcc pin prevents ringing on enable edges from corrupting bus data.
How does the ALVC logic family of 74ALVCHR16269AVRE4 compare to LVCH or LVTC alternatives for a 3.3 V bus buffer?
ALVC devices support the same 1.65 V to 3.3 V supply range as LVCH but add full 5 V input tolerance, allowing legacy 5 V TTL bus signals to drive the ALVC inputs without damage. In a mixed-voltage backplane with both 5 V legacy cards and 3.3 V modern cards, 74ALVCHR16269AVRE4 bridges both voltage domains in one device, while LVTC (LVC) devices would require voltage-clamp diodes or separate level shifters for 5 V input signals exceeding the 3.6 V absolute maximum.
How many independent data bits does 74ALVCHR16269AVRE4 manage and how does this affect bus width scaling?
The device manages 12-bit to 24-bit exchange, providing 12 registered bits on each of two ports for a total of 24 data lines accessible through the 56-pin SSOP package. To scale to a 48-bit wide bus, two devices are used in parallel with shared clock and enable signals. This cascading approach adds only one gate delay per additional device level, keeping total registered bus latency below 6 ns at 3.3 V for up to four cascaded 74ALVCHR16269 ICs in a 96-bit wide bus configuration.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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