|
|
PDF HD74ALVCH162270 Data sheet ( Hoja de datos )
| Número de pieza | HD74ALVCH162270 | |
| Descripción | 12-bit to 24-bit Registered Bus Exchanger with 3-state Outputs | |
| Fabricantes | Hitachi Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de HD74ALVCH162270 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
|
No Preview Available !
HD74ALVCH162270
12-bit to 24-bit Registered Bus Exchanger with 3-state Outputs
ADE-205-178A (Z)
2nd. Edition
March 1998
Description
The HD74ALVCH162270 is used in applications where data must be transferred from a narrow high speed
bus to a wide lower frequency bus. The device provides synchronous data exchange between the two ports.
Data is stored in the internal registers on the low to high transition of the clock (CLK) input when the
appropriate CLKEN inputs are low. The select (SEL) line selects 1B or 2B data for the A outputs. For data
transfer in the A to B direction, a two stage pipeline is provided in the A to 1B path, with a single storage
register in the A to 2B path. Proper control of the CLKENA inputs allows two sequential 12-bit words to
be presented synchronously as a 24-bit word on the B port. Data flow is controlled by the active low output
enables (OEA, OEB). The control terminals are registered to synchronize the bus direction changes with
CLK. Active bus hold circuitry is provided to hold unused or floating data inputs at a valid logic level. All
outputs, which are designed to sink up to 12 mA, include 26 Ω resistors to reduce overshoot and
undershoot.
Features
• VCC = 2.3 V to 3.6 V
• Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C)
• Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C)
• High output current ±12 mA (@VCC = 3.0 V)
• Bus hold on data inputs eliminates the need for external pullup / pulldown resistors
• All outputs have equivalent 26 Ω series resistors, so no external resistors are required.
1 page  
HD74ALVCH162270
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit Conditions
Supply voltage
Input voltage *1, 2
Output voltage *1, 2
Input clamp current
Output clamp current
Continuous output current
VCC, GND current / pin
Maximum power dissipation
at Ta = 55°C (in still air) *3
VCC
VI
VO
I IK
I OK
IO
ICC or IGND
PT
–0.5 to 4.6
–0.5 to 4.6
–0.5 to VCC +0.5
–0.5 to VCC +0.5
–50
±50
±50
±100
1
V
V Except I/O ports
I/O ports
V
mA VI < 0
mA VO < 0 or VO > VCC
mA VO = 0 to VCC
mA
W TSSOP
Storage temperature
Tstg –65 to 150
°C
Notes:
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage
to the device. These are stress ratings only, and functional operation of the device at these or
any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute maximum rated conditions for extended periods may affect device
reliability.
1. The input and output negative voltage ratings may be exceeded if the input and output clamp
current ratings are observed.
2. This value is limited to 4.6 V maximum.
3. The maximum package power dissipation is calculated using a junction temperature of 150°C
and a board trace length of 750 mils.
Recommended Operating Conditions
Item
Symbol
Min
Max Unit Conditions
Supply voltage
Input voltage
Output voltage
High level output current
VCC
VI
VO
I OH
Low level output current
I OL
Input transition rise or fall rate
∆t / ∆v
2.3
0
0
—
—
—
—
—
—
0
3.6 V
VCC V
VCC V
–6 mA VCC = 2.3 V
–8 VCC = 2.7 V
–12 VCC = 3.0 V
6 mA VCC = 2.3 V
8 VCC = 2.7 V
12 VCC = 3.0 V
10 ns / V
Operating temperature
Ta –40 85 °C
Note: Unused control inputs must be held high or low to prevent them from floating.
5
5 Page 
HD74ALVCH162270
• Waveforms – 1
tr
Input
10 %
90 %
Vref
tPLH
tf
90 %
Vref
10 %
tPHL
Output
Vref Vref
VIH
GND
VOH
VOL
• Waveforms – 2
Timing Input
Data Input
Input
tr
10 %
tsu
90 %
Vref
th
Vref
tw
Vref
Vref
Vref
VIH
GND
VIH
GND
VIH
GND
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet HD74ALVCH162270.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| HD74ALVCH162270 | 12-bit to 24-bit Registered Bus Exchanger with 3-state Outputs | Hitachi Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |