SN74LVTH322374 具有三态输出的 3.3V ABT 32 位边沿触发 D 类触发器
The SN74LVTH322374 is a 32-bit edge-triggered D-type flip-flop with 3-state outputs designed for low-voltage (3.3-V) VCC operation, but with the capability to provide a TTL interface to a 5-V system environment. It is particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers.
This device can be used as four 8-bit flip-flops, two 16-bit flip-flops, or one 32-bit flip-flop. On the positive transition of the clock (CLK), the Q outputs of the flip-flop take on the logic levels set up at the D inputs.
A buffered output-enable (OE) input can be used to place the eight outputs in either a normal logic state (high or low logic levels) or the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines significantly. The high-impedance state and the increased drive provide the capability to drive bus lines without need for interface or pullup components.
OE does not affect internal operations of the flip-flop. Old data can be retained or new data can be entered while the outputs are in the high-impedance state.
The outputs, which are designed to source or sink up to 12 mA, include equivalent 22-
series resistors to reduce overshoot and undershoot.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors with the bus-hold circuitry is not recommended.
When VCC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5 V, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.
This device is fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry disables the outputs, preventing damaging current backflow through the device when it is powered down. The power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down, which prevents driver conflict
| SN74LVTH322374 | |
| Voltage Nodes(V) | 3.3, 2.7 |
| Vcc range(V) | 2.7 to 3.6 |
| Input Level | TTL |
| Output Level | TTL |
| Output Drive(mA) | -/+12 |
| No. of Outputs | 32 |
| No. of Bits | 32 |
| Static Current | 10 mA |
| th(ns) | 0.8 |
| tpd max(ns) | 5.3 |
| tsu(ns) | 1.8 |
| Logic | True |
| Technology Family | LVT |
| Rating | Catalog |
SN74LVTH322374 特性
- Member of the Texas InstrumentsWidebus+™ Family
- Output Ports Have Equivalent 22- Series Resistors, So No External Resistors Are Required
- Supports Mixed-Mode Signal Operation
(5-V Input and Output Voltages With 3.3-V VCC) - Supports Unregulated Battery Operation Down to 2.7 V
- Typical VOLP (Output Ground Bounce) <0.8 V at VCC = 3.3 V, TA = 25°C
- Ioff and Power-Up 3-State Support Hot Insertion
- Bus Hold on Data Inputs Eliminates the Need for External Pullup/Pulldown Resistors
- Distributed VCC and GND Pins Minimize High-Speed Switching Noise
- Flow-Through Architecture Optimizes PCB Layout
- Latch-Up Performance Exceeds 500 mA Per JESD 17
- ESD Protection Exceeds JESD 22
- 2000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
SN74LVTH322374 芯片订购指南
| 器件 | 状态 | 温度 | 价格（美元） | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| 74LVTH322374ZKER | ACTIVE | -40 to 85 | 2.75 | 1ku | LFBGA (GKE) | 96 | 1000 | LARGE T&R | |
| SN74LVTH322374KR | NRND | -40 to 85 | 2.75 | 1ku | LFBGA (GKE) | 96 | 1000 | LARGE T&R |
SN74LVTH322374 质量与无铅数据
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 环保信息与无铅 (Pb-free) | DPPM / MTBF / FIT 率 |
| 74LVTH322374ZKER | Green (RoHS & no Sb/Br) | SNAGCU | Level-3-260C-168 HR | 74LVTH322374ZKER | 74LVTH322374ZKER |
| SN74LVTH322374KR | TBD | SNPB | Level-2-235C-1 YEAR | SN74LVTH322374KR | SN74LVTH322374KR |
SN74LVTH322374 应用技术支持与电子电路设计开发资源下载
- SN74LVTH322374 数据资料 dataSheet 下载.PDF
- TI 德州仪器触发器/锁存器/寄存器产品选型与价格 . xls
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Understanding and Interpreting Standard-Logic Data Sheets (PDF 857 KB)
- TI IBIS File Creation, Validation, and Distribution Processes (PDF 380 KB)
- Implications of Slow or Floating CMOS Inputs (PDF 101 KB)
- CMOS Power Consumption and CPD Calculation (PDF 89 KB)
- Designing With Logic (PDF 186 KB)
- Live Insertion (PDF 150 KB)
- Input and Output Characteristics of Digital Integrated Circuits (PDF 1708 KB)
- Using High Speed CMOS and Advanced CMOS in Systems With Multiple Vcc (PDF 43 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- LOGIC Pocket Data Book (PDF 6001 KB)
- HiRel Unitrode Power Management Brochure (PDF 206 KB)
- Logic Cross-Reference (PDF 2938 KB)
