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SN74LV8154 PDF预览

SN74LV8154

更新时间： 2024-11-23 23:03:19
品牌 Logo 应用领域
德州仪器 - TI 计数器输出元件
页数 文件大小 规格书
11页 253K
描述
DUAL 16 BIT BINARY COUNTERS WITH 3 STATE OUTPUT REGISTERS

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SN74LV8154 数据手册

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SCLS589 − AUGUST 2004  
N OR PW PACKAGE  
(TOP VIEW)  
D
Can Be Used as Two 16-Bit Counters or a  
Single 32-Bit Counter  
D
D
D
D
D
D
D
2-V to 5.5-V V  
Operation  
CC  
CLKA  
CLKB  
GAL  
GAU  
GBL  
1
2
3
4
5
6
7
8
9
10  
20  
V
CC  
Max t of 25 ns at 5 V (RCLK to Y)  
19 Y0  
18 Y1  
17 Y2  
pd  
Typical V  
<0.7 V at V  
(Output Ground Bounce)  
OLP  
CC  
= 5 V, T = 25°C  
A
16  
Y3  
Typical V  
>4.4 V at V  
(Output V  
Undershoot)  
OHV  
CC  
OH  
GBU  
RCLK  
RCOA  
CLKBEN  
GND  
15 Y4  
= 5 V, T = 25°C  
A
14  
13  
12  
11  
Y5  
Y6  
Y7  
CCLR  
I
Supports Partial-Power-Down Mode  
off  
Operation  
Latch-Up Performance Exceeds 250 mA Per  
JESD 17  
ESD Protection Exceeds JESD 22  
− 2000-V Human-Body Model (A114-A)  
− 200-V Machine Model (A115-A)  
− 1000-V Charged-Device Model (C101)  
description/ordering information  
The SN74LV8154 is a dual 16-bit binary counter with 3-state output registers, designed for 2-V to 5.5-V V  
operation.  
CC  
This 16-bit counter (A or B) feeds a 16-bit storage register, and each storage register is further divided into an  
upper byte and lower byte. The GAL, GAU, GBL, GBU inputs are used to select the byte that needs to be output  
at Y0−Y7. CLKA is the clock for A counter, and CLKB is the clock for B counter. RCLK is the clock for the A and  
B storage registers. All three clock signals are positive-edge triggered.  
A 32-bit counter can be realized by connecting CLKA and CLKB together and by connecting RCOA to CLKBEN.  
To ensure the high-impedance state during power up or power down, GAL, GAU, GBL, and GBU should be tied  
to V through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability  
CC  
of the driver.  
This device is fully specified for partial-power-down applications using I . The I circuitry disables the outputs,  
off  
off  
preventing damaging current backflow through the device when it is powered down.  
ORDERING INFORMATION  
ORDERABLE  
PART NUMBER  
TOP-SIDE  
MARKING  
†
PACKAGE  
T
A
PDIP − N  
Tube  
SN74LV8154N  
SN74LV8154N  
−40°C to 85°C  
Tube  
SN74LV8154PW  
SN74LV8154PWR  
TSSOP − PW  
LV8154  
Tape and reel  
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design  
guidelines are available at www.ti.com/sc/package.  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
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Copyright 2004, Texas Instruments Incorporated  
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1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...11

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