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參數(shù)資料
| 型號： | SN74AVC32373GKE |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 1.2-V/3.3-V 32-BIT TRANSPARENT D-TYPE LATCHES WITH 3-STATE OUTPUTS |
| 中文描述： | 1.2-V/3.3-V 32位透明D型鎖存器具有三態(tài)輸出 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 165K |
| 代理商： | SN74AVC32373GKE |
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.
SN74AVC32373
1.2-V/3.3-V 32-BIT TRANSPARENT D-TYPE LATCHES
WITH 3-STATE OUTPUTS
SCES327 – APRIL 2000
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Member of the Texas Instruments
Widebus
Family
EPIC
(Enhanced-Performance Implanted
CMOS) Submicron Process
DOC
(Dynamic Output Control) Circuit
Dynamically Changes Output Impedance,
Resulting in Noise Reduction Without
Speed Degradation
Dynamic Drive Capability Is Equivalent to
Standard Outputs With I
OH
and I
OL
of
±
24 mA at 2.5-V V
CC
Overvoltage-Tolerant Inputs/Outputs Allow
Mixed-Voltage-Mode Data Communications
I
off
Supports Partial-Power-Down Mode
Operation
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
Packaged in Plastic Fine-Pitch Ball Grid
Array Package
description
A Dynamic Output Control (DOC) circuit is implemented, which, during the transition, initially lowers the output
impedance to effectively drive the load and, subsequently, raises the impedance to reduce noise. Figure 1
shows typical V
OL
vs I
OL
and V
OH
vs I
OH
curves to illustrate the output impedance and drive capability of the
circuit. At the beginning of the signal transition, the DOC circuit provides a maximum dynamic drive that is
equivalent to a high-drive standard-output device. For more information, refer to the TI application reports, AVC
Logic Family Technology and Applications literature number SCEA006, and Dynamic Output Control (DOC
)
Circuitry Technology and Applications literature number SCEA009.
136
–128
–144
–160
0.4
0.8
1.2
1.6
2.0
2.4
2.8
170
153
119
102
85
68
51
34
17
0
0.4
0.8
1.2
1.6
2.0
2.4
2.8
3.2
TA = 25
°
C
Process = Nominal
IOL – Output Current – mA
VCC = 3.3 V
VCC = 2.5 V
VCC = 1.8 V
–
O
V
TA = 25
°
C
Process = Nominal
IOH – Output Current – mA
VCC = 3.3 V
VCC = 2.5 V
VCC = 1.8 V
–
O
V
–80
–96
–112
–32
–48
–64
0
–16
Figure 1. Output Voltage vs Output Current
This 32-bit transparent D-type latch with is operational from 1.2-V or 3.6-V V
CC
, but is designed specifically for
1.65-V to 3.6-V V
CC
operation.
The SN74AVC32373 can be used as four 8-bit latches, two 16-bit latches, or one 32-bit latch. When the
latch-enable (LE) input is high, the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs
are latched at the 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 increased drive provide the capability to drive bus lines
without interface or pullup components.
Copyright
2000, Texas Instruments Incorporated
DOC, EPIC, and Widebus are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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