74HC299: 8-bit universal shift register; 3-state
The 74HC299 is an 8-bit universal shift register with 3-state outputs. It
contains eight edge-triggered D-type flip-flops and the
interstage logic necessary to perform synchronous shift-right,
shift-left, parallel load and hold operations. The type of
operation is determined by the mode select inputs S0 and S1.
Pins I/O0 to I/O7 are flip-flop 3-state buffer outputs which
allow them to operate as data inputs in parallel load mode. The
serial outputs Q0 and Q7 are used for expansion in serial
shifting of longer words. A LOW signal on the asynchronous
master reset input MR overrides
the Sn and clock CP inputs and resets the flip-flops. All other
state changes are initiated by the rising edge of the clock
pulse. Inputs can change when the clock is either state,
provided that the recommended set-up and hold times are
observed. A HIGH signal on the 3-state output enable inputs OE1 or OE2 disables the 3-state
buffers and the I/On outputs assume a high-impedance OFF-state.
In this condition, the shift, hold, load and reset operations
can still occur. The 3-state buffers are also disabled by HIGH
signals on both S0 and S1, when in preparation for a parallel
load operation. Inputs include clamp diodes. This enables the
use of current limiting resistors to interface inputs to
voltages in excess of VCC.
74HC299: 产品结构框图
74HC299: 应用结构框图
Outline 3d SOT339-1
数据手册 (1)
应用说明 (2)
用户指南 (1)
| 名称/描述 | Modified Date |
|---|
| HC/T User Guide (REV 1.0) PDF (508.0 kB) HCT_USER_GUIDE [English] | 01 Nov 1997 |
封装信息 (3)
包装 (2)
支持信息 (3)
订购信息
| 型号 | 状态 |
|---|
| 74HC299D | Active |
| 74HC299DB | Active |
| 74HC299PW | Active |
封装环保信息
| 产品编号 | 封装说明 | Outline Version | 回流/波峰焊接 | 包装 | 产品状态 | 部件编号订购码 (12NC) | Marking | 化学成分 | RoHS / 无铅 / RHF | 无铅转换日期 | EFR | IFR(FIT) | MTBF（小时） | MSL | MSL LF |
|---|
| 74HC299D |  | SOT163-1 | Reflow_Soldering_Profile
Wave_Soldering_Profile
Reflow_Soldering_Profile
Wave_Soldering_Profile | Reel 13" Q1/T1 CECC | Active | 74HC299D,653
(9337 135 40653) | 74HC299D | 74HC299D |    | week 4, 2004 | 84.9 | 6.62 | 1.51E8 | 1 | 1 |
| Bulk Pack, CECC | Active | 74HC299D,652
(9337 135 40652) | 74HC299D | 74HC299D | | week 4, 2004 | 84.9 | 6.62 | 1.51E8 | 1 | 1 |
| 74HC299DB | | SOT339-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Active | 74HC299DB,118
(9351 898 90118) | HC299 | 74HC299DB | | week 17, 2005 | 84.9 | 6.62 | 1.51E8 | 1 | 1 |
| Bulk Pack | Active | 74HC299DB,112
(9351 898 90112) | HC299 | 74HC299DB | | week 17, 2005 | 84.9 | 6.62 | 1.51E8 | 1 | 1 |
| 74HC299PW |  | SOT360-1 | SSOP-TSSOP-VSO-WAVE | Reel 13" Q1/T1 | Discontinued | 74HC299PW,118
(9352 869 24118) | HC299 | 74HC299PW |  | Always Pb-free | 84.9 | 6.62 | 1.51E8 | 1 | 1 |
| Bulk Pack | Active | 74HC299PW,112
(9352 869 24112) | HC299 | 74HC299PW | | Always Pb-free | 84.9 | 6.62 | 1.51E8 | 1 | 1 |
