參數(shù)資料
型號(hào): 74ALVCH16600
廠商: NXP Semiconductors N.V.
英文描述: 18-bit universal bus transceiver 3-State
中文描述: 18位通用總線收發(fā)器,三態(tài)
文件頁數(shù): 2/14頁
文件大?。?/td> 88K
代理商: 74ALVCH16600
Philips Semiconductors
Product specification
74ALVCH16600
18-bit universal bus transceiver (3-State)
2
1998 Sep 24
853-2123 20077
FEATURES
Complies with JEDEC standard no. 8-1A.
CMOS low power consumption
Direct interface with TTL levels
Current drive
±
24 mA at 3.0 V
All inputs have bus hold circuitry
Output drive capability 50
transmission lines @ 85
°
C
MULTIBYTE
TM
flow-through standard pin-out architecture
Low inductance multiple V
CC
and ground pins for minimum noise
and ground bounce
DESCRIPTION
The 74ALVCH16600 is an 18-bit universal transceiver featuring
non-inverting 3-State bus compatible outputs in both send and
receive directions. Data flow in each direction is controlled by output
enable (OE
AB
and OE
BA
), latch enable (LE
AB
and LE
BA
), and clock
(CP
AB
and CP
BA
) inputs. For A-to-B data flow, the device operates
in the transparent mode when LE
AB
is High. When LE
AB
is Low, the
A data is latched if CP
AB
is held at a High or Low logic level. If LE
AB
is Low, the A-bus data is stored in the latch/flip-flop on the
High-to-Low transition of CP
AB
. When OE
AB
is Low, the outputs are
active. When OE
AB
is High, the outputs are in the high-impedance
state. The High clock can be controlled with the clock-enable inputs
(CE
BA
/CE
AB
).
Data flow for B-to-A is similar to that of A-to-B but uses OE
BA
, LE
BA
and CP
BA
.
To ensure the high impedance state during power up or power
down, OE
BA
and OE
AB
should be tied to V
CC
through a pullup
resistor; the minimum value of the resistor is determined by the
current-sinking/current-sourcing capability of the driver.
Active bus hold circuitry is provided to hold unused or floating data
inputs at a valid logic level.
QUICK REFERENCE DATA
GND = 0V; T
amb
= 25
°
C; t
r
= t
f
= 2.5ns
SYMBOL
PARAMETER
CONDITIONS
TYPICAL
UNIT
t
PHL
/t
PLH
Propagation delay
An, Bn to Bn, An
V
CC
= 2.5V, C
L
= 30pF
V
CC
= 3.3V, C
L
= 50pF
3.1
2.8
ns
C
I/O
C
I
Input/Output capacitance
8.0
pF
Input capacitance
4.0
pF
C
PD
Power dissipation capacitance per latch
V = GND to V
CC1
Outputs enabled
21
pF
Outputs disabled
3
NOTES:
1.
C
PD
is used to determine the dynamic power dissipation (P
D
in W):
P
= C
×
V
CC2
×
f
+ (C
L
×
V
CC2
×
f
) where:
f
i
= input frequency in MHz; C
L
= output load capacitance in pF;
f
o
= output frequency in MHz; V
= supply voltage in V;
(C
L
×
V
CC2
×
f
o
) = sum of outputs.
ORDERING INFORMATION
PACKAGES
56-Pin Plastic TSSOP Type II
TEMPERATURE RANGE
–40
°
C to +85
°
C
OUTSIDE NORTH AMERICA
74ALVCH16600 DGG
DWG NUMBER
SOT364-1
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