Philips 74ALVC16834A Datasheet
INTEGRATED CIRCUITS
74ALVC16834A
18-bit registered driver with
inverted register enable (3-State)
Product specification
Replaces datasheet 74ALVC16834 of 2000 Jan 04
IC24 Data Handbook
2000 Mar 14
Philips Semiconductors Product specification
CPDPower dissipation capacitance per buffer
V
GND to V
1
pF
18-bit registered driver with inverted register enable
(3-State)
FEA TURES
•Wide supply voltage range of 1.2 V to 3.6 V
•Complies with JEDEC standard no. 8-1A.
•CMOS low power consumption
•Direct interface with TTL levels
•Current drive ± 24 mA at 3.0 V
•MULTIBYTE
•Low inductance multiple V
and ground bounce
TM
flow-through standard pin-out architecture
and GND pins for minimum noise
CC
•Output drive capability 50 Ω transmission lines @ 85°C
•Input diodes to accommodate strong drivers
DESCRIPTION
The 74ALVC16834A is an 18-bit registered driver. Data flow is
controlled by active low output enable (OE
(LE
) and clock inputs (CP).
When LE is LOW, the A to Y data flow is transparent. When LE is
HIGH and CP is held at LOW or HIGH, the data is latched; on the
LOW to HIGH transient of CP the A-data is stored in the
latch/flip-flop.
When OE
is LOW the outputs are active. When OE is HIGH, the
outputs go to the high impedance OFF-state. Operation of the OE
input does not affect the state of the latch/flip-flop.
To ensure the high-impedance state during power up or power
down, OE
should be tied to VCC through a pullup resistor; the
minimum value of the resistor is determined by the current-sinking
capability of the driver.
), active low latch enable
PIN CONFIGURATION
1
2
NC
3
Y
1
4
GND
5
Y
2
6
Y
3
7
V
CC
8
Y
4
9
Y
5
Y
10
6
GND
11
Y
12
7
Y
13
8
14
Y
9
15
Y
10
16
Y
11
17
Y
12
18
GND
19
Y
13
20
Y
14
21
Y
15
22
V
CC
23
Y
16
24
Y
17
25
GND
26
Y
18
27
OE
28 29
LE
74AL VC16834A
56NC
GND
55
NC
54
A
1
53
GND
52
A
2
51
A
3
50
V
CC
49
A
4
48
A
5
A
47
6
GND
46
A
45
7
A
44
8
43
A
9
42
A
10
41
A
11
40
A
12
39
GND
38
A
13
37
A
14
36
A
15
35
V
CC
34
A
16
33
A
17
32
GND
31
A
18
30
CP
GND
QUICK REFERENCE DA TA
GND = 0 V; T
SYMBOL
t
PHL/tPLH
f
max
C
I
C
I/O
NOTES:
is used to determine the dynamic power dissipation (PD in µW):
1. C
PD
= CPD × V
P
D
= output frequency in MHz; VCC = supply voltage in V; S (CL × V
f
o
2000 Mar 14 853–2192 23314
= 25°C; tr = tf ≤ 2.5 ns
amb
Propagation delay
An to Yn;
LE
to Yn;
CP to Yn
Maximum clock frequency VCC = 3.3 V, CL = 50 pF 350 MHz
Input capacitance 4.0 pF
Input/Output capacitance 8.0 pF
2
× fi + S (CL × V
CC
SH00194
PARAMETER CONDITIONS TYPICAL UNIT
VCC = 3.3 V, CL = 50 pF
2.3
2.6
2.5
transparent mode
Output enabled
p
p
p
=
I
CC
Output disabled
Clocked mode
Output enabled
Output disabled
2
× fo) where: fi = input frequency in MHz; CL = output load capacitance in pF;
CC
2
× fo) = sum of outputs.
CC
13
3
22
15
2
ns
p
Philips Semiconductors Product specification
18-bit registered driver with inverted register enable
74ALVC16834A
(3-State)
ORDERING INFORMATION
PACKAGES
TEMPERATURE
RANGE
ORDER CODE
56-Pin Plastic Thin Shrink Small Outline (TSSOP) Type II –40°C to +85°C 74ALVC16834A DGG SOT364-1
PIN DESCRIPTION
LOGIC SYMBOL
PIN NUMBER SYMBOL NAME AND FUNCTION
1, 2, 55 NC No connection
OE
3, 5, 6, 8, 9, 10, 12, 13,
14, 15, 16, 17, 19, 20,
Y1 to Y18Data outputs
21, 23, 24, 26
4, 11, 18, 25, 32, 39, 46,
53, 56
7, 22, 35, 50 V
27 OE
28 LE
GND Ground (0 V)
Positive supply voltage
CC
Output enable input
(active LOW)
Latch enable input
(active LOW)
CP
LE
30 CP Clock input
54, 52, 51, 49, 48, 47,
45, 44, 43, 42, 41, 40,
38, 37, 36, 34, 33, 31
A1 to A18Data inputs
A
1
D
LE
CP
DRAWING
NUMBER
Y
1
TO THE 17 OTHER CHANNELS
TYPICAL INPUT (DATA OR CONTROL)
V
CC
A1
SH00200
SH00202
2000 Mar 14
3
Philips Semiconductors Product specification
OUTPUTS
18-bit registered driver with inverted register enable
(3-State)
LOGIC SYMBOL (IEEE/IEC)
27
OE
30
CP
28
LE
3
Y
1
5
Y
2
6
Y
3
8
Y
4
9
Y
5
10
Y
6
12
Y
7
13
Y
8
14
Y
9
15
Y
10
16
Y
11
17
Y
12
19
Y
13
20
Y
14
21
Y
15
23
Y
16
24
Y
17
26
Y
18
EN1
2C3
C3
G2
1 ∇ 1
54
A
1
52
A
2
51
A
3
3D
49
48
47
45
44
43
42
41
40
38
37
36
34
33
31
SH00196
A
4
A
5
A
6
A
7
A
8
A
9
A
10
A
11
A
12
A
13
A
14
A
15
A
16
A
17
A
18
FUNCTION TABLE
OE LE CP A
H X X X Z
L L X L L
L L X H H
L H ↑ L L
L H ↑ H H
L H H X Y
L H L X Y
H = HIGH voltage level
L = LOW voltage level
X = Don’t care
Z = High impedance “off” state
↑ = LOW-to-HIGH level transition
NOTES:
1. Output level before the indicated steady-state input conditions
were established, provided that CP is high before LE goes low.
2. Output level before the indicated steady-state input conditions
were established.
INPUTS
74ALVC16834A
1
0
2
0
2000 Mar 14
4
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