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HD74ALVCH162831 PDF даташит

Спецификация HD74ALVCH162831 изготовлена ​​​​«Hitachi Semiconductor» и имеет функцию, называемую «1-bit 4-bit Address Register / Driver with 3-state Outputs».

Детали детали

Номер произв HD74ALVCH162831
Описание 1-bit 4-bit Address Register / Driver with 3-state Outputs
Производители Hitachi Semiconductor
логотип Hitachi Semiconductor логотип 

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HD74ALVCH162831 Даташит, Описание, Даташиты
HD74ALVCH162831
1-bit 4-bit Address Register / Driver with 3-state Outputs
ADE-205-195 (Z)
Preliminary
1st. Edition
March 1998
Description
This 1-bit to 4-bit address register / driver is designed for 2.3 V to 3.6 V VCC operation. The device is ideal
for use in applications in which a single address bus is driving four separate memory locations. The
HD74ALVCH162831 can be used as a buffer or a register, depending on the logic level of the select (SEL)
input. When SEL is logic high, the device is in the buffer mode. The outputs follow the inputs and are
controlled by the two output enable (OE) controls. Each OE controls two groups of nine outputs. When
SEL is logic low, the device is in the register mode. The register is an edge triggered D-type flip flop. On
the positive transition of the clock (CLK) input, data set up at the A inputs is stored in the internal registers.
OE controls operate the same as in buffer mode. When OE is logic low, the outputs are in a normal logic
state (high or low logic level). When OE is logic high, the outputs are in the high impedance state. To
ensure the high impedance state during power up or power down, OE should be tied to VCC through a
pullup registor; the minimum value of the registor is determined by the current sinking capability of the
driver. SEL and OE do not affect the internal operation of the flip flops. Old data can be retained or new
data can be entered while the outputs are in the high impedance state. 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 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 series resistors, so no external resistors are required.









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HD74ALVCH162831 Даташит, Описание, Даташиты
HD74ALVCH162831
Function Table
Inputs
OE SEL
HX
LH
LH
LL
LL
H : High level
L : Low level
X : Immaterial
Z : High impedance
: Low to high transition
CLK
X
X
X
A
X
L
H
L
H
Output Y
Z
L
H
L
H
2









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HD74ALVCH162831 Даташит, Описание, Даташиты
Pin Arrangement
HD74ALVCH162831
4Y1 1
3Y1 2
GND 3
2Y1 4
1Y1 5
VCC 6
NC 7
A1 8
GND 9
NC 10
A2 11
GND 12
NC 13
A3 14
VCC 15
NC 16
A4 17
GND 18
CLK 19
OE1 20
OE2 21
SEL 22
GND 23
A5 24
A6 25
VCC 26
A7 27
NC 28
GND 29
A8 30
NC 31
GND 32
A9 33
NC 34
VCC 35
4Y9 36
3Y9 37
GND 38
2Y9 39
1Y9 40
(Top view)
80 1Y2
79 2Y2
78 GND
77 3Y2
76 4Y2
75 VCC
74 1Y3
73 2Y3
72 GND
71 3Y3
70 4Y3
69 GND
68 1Y4
67 2Y4
66 VCC
65 3Y4
64 4Y4
63 GND
62 1Y5
61 2Y5
60 3Y5
59 4Y5
58 GND
57 1Y6
56 2Y6
55 VCC
54 3Y6
53 4Y6
52 GND
51 1Y7
50 2Y7
49 GND
48 3Y7
47 4Y7
46 VCC
45 1Y8
44 2Y8
43 GND
42 3Y8
41 4Y8
3










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