Philips 74alvch16646 DATASHEETS
INTEGRATED CIRCUITS
74ALVCH16646
16-bit bus transceiver/register (3-State)
Product specification 1998 Sep 03
IC24 Data Handbook
Philips Semiconductors Product specification
CPDPower dissipation capacitance per channel
V
GND to V
1
pF
74AL VCH1664616-bit bus transceiver/register (3-State)
FEA TURES
•Complies with JEDEC standard no. 8-1A
•CMOS low power consumption
•MULTIBYTE
•Low inductance, multiple V
and ground bounce
TM
flow-through pin-out architecture
and ground pins for minimum noise
CC
•Direct interface with TTL levels
•Current drive ± 24 mA at 3.0 V
•Output drive capability 50Ω transmission lines @ 85°C
•All inputs have bushold circuitry
DESCRIPTION
The 74ALVCH16646 consists of 16 non-inverting bus transceiver
circuits with 3-State outputs, D-type flip-flops and control circuitry
arranged for multiplexed transmission of data directly from the
internal registers. Data on the ‘A’ or ‘B’ bus will be clocked in the
internal registers, as the appropriate clock (CP
HIGH logic level. Output enable (OE
) and direction (DIR) inputs are
provided to control the transceiver function. In the transceiver mode,
data present at the high-impedance port may be stored in either the
‘A’ or ‘B’ register, or in both. The select source inputs (S
can multiplex stored and real-time (transparent mode) data. The
direction (DIR) input determines which bus will receive data when
OE
is active (LOW). In the isolation mode (OE = HIGH), ‘A’ data
may be stored in the ‘B’ register and/or ‘B’ data may be stored in the
‘A’ register.
When an output function is disabled, the input function is still
enabled and may be used to store and transmit data. Only one of
the two buses, ‘A’ or ‘B’ may be driven at a time.
To ensure the high impedance state during power up or power
down, OE should be tied to VCC through a pullup resistor; the
or CPBA) goes to a
AB
and SBA)
AB
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.
PIN CONFIGURATION
1OE
1
1DIR
2
1CP
AB
3
1S
AB
4
GND
5
1A0
6
1A1
7
V
CC
8
1A2
9
1A3
10
1A4
11
GND
12
1A5
13
1A6
14
1A7
15
2A0
16
2A1
17
2A2
18
GND
19
2A3
20
2A4
21
2A5
22
V
CC
23
2A6
24
2A7 2B7
25
GND
26
2S
AB
27
2CP
AB
28
2DIR
56
55
1CP
54
1S
53
GND
52
1B0
51
1B1
50
V
49
1B2
48
1B3
47
1B4
46
GND
45
1B5
44
1B6
43
1B7
42
2B0
41
2B1
40
2B2
39
GND
38
2B3
37
2B4
36
2B5
35
V
34
2B6
33
32
GND
31
2S
30
2CP
29
2OE
SY00011
BA
BA
CC
CC
BA
BA
QUICK REFERENCE DA TA
GND = 0V; T
SYMBOL
t
PHL/tPLH
C
I
F
max
NOTES:
is used to determine the dynamic power dissipation (PD in µW):
1. C
PD
= CPD × V
P
D
f
= input frequency in MHz; CL = output load capacity in pF;
i
= output frequency in MHz; VCC = supply voltage in V;
f
o
(C
= 25°C; tr = tf ≤ 2.5ns
amb
Propagation delay
nAx to nBx
Input capacitance 3.0 pF
Maximum clock frequency
CC
2
× V
L
× fo) = sum of outputs.
CC
2
× fi + (CL × V
ORDERING INFORMATION
PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA DWG NUMBER
56-Pin Plastic TSSOP Type II –40°C to +85°C 74ALVCH16646 DGG ACH16646 DGG SOT364-1
1998 Sep 03 853-21 16 19959
PARAMETER CONDITIONS TYPICAL UNIT
VCC = 2.5V, CL = 30pF
VCC = 3.3V, CL = 50pF
p
p
p
=
I
CC
Outputs enabled 36
Outputs disabled 4
VCC = 2.5V, CL = 30pF
VCC = 3.3V, CL = 50pF
2
× fo) where:
CC
2.6
2.7
300
320
2
ns
p
MHz
Philips Semiconductors Product specification
74ALVCH1664616-bit bus transceiver/register (3-State)
PIN DESCRIPTION
PIN NUMBER SYMBOL NAME AND FUNCTION
1, 28 nDIR Direction control input
2, 27 nCP
3, 26 nS
5, 6, 8, 9, 10,
12, 13, 14
1A0 to 1A7 Data inputs/outputs
4, 11, 18, 25,
32, 39, 46, 53
7, 22, 35, 50 V
15, 16, 17, 19,
20, 21, 23, 24
2A0 to 2A7 Data inputs/outputs
AB
GND Ground (0V)
CC
Clock input A-to-B
AB
Select input A-to-B
Positive supply voltage
29, 56 nOE Output enable
30, 55 nCP
31, 54 nS
42, 41, 40, 38,
37, 36, 34, 33
52, 51, 49, 48,
47, 45, 44, 43
BA
2B0 to 2B7 Data inputs/outputs
1B0 to 1B7 Data inputs/outputs
BA
Clock input B-to-A
Select input B-to-A
LOGIC SYMBOL
1A0
5
1A1
6
1A2
8
1A3
9
1A4
10
1A5
12
1A6
13
1A7
14
1OE
56
1
1DIR
2
1S
AB
54
1S
BA
2
1CP
AB
55
1CP
BA
1B0
1B1
1B2
1B3
1B4
1B5
1B6
1B7
15
52
51
49
48
47
45
44
43
2A0
16
2A1
17
2A2
19
2A3
20
2A4
21
2A5
2A6
23
2A7
24
2OE
29
2DIR
28
2S
26
AB
2S
31
BA
2CP
27
AB
2CP
30
BA
2B0
2B1
2B2
2B3
2B4
2B5
2B6
2B7
42
41
40
38
37
36
34
33
SY00013
BUSHOLD CIRCUIT
V
CC
Data Input
LOGIC SYMBOL (IEEE/IEC)
56
1OE
1
1DIR
55
1CP
BA
54
1S
BA
2
1CP
AB
3
1S
AB
29
2OE
28
2DIR
30
2CP
BA
31
2S
BA
27
2CP
AB
26
2S
AB
5
1A0
6
1A1 1B1
8
1A2
9
1A3
10
1A4
12
1A5
13
1A6
14
1A7
15
2A0
16
2A1
17
2A2
19
2A3
20
2A4
21
2A5
23
2A6
24
2A7
G3
3EN1[BA]
3EN2[AB]
C4
G5
C6
G7
G10
10EN8[BA]
10EN9[AB]
C11
G12
C13
G14
3
1
1
6D 7
17
1
8
13D 14
114
54D
1
5
3
1
2
12 11D
12
1
1
9
To internal circuit
SW00050
52
1B0
51
49
1B2
48
1B3
47
1B4
45
1B5
44
1B6
43
1B7
42
2B0
41
2B1
40
2B2
38
2B3
37
2B4
36
2B5
34
2B6
33
2B7
1998 Sep 03
SY00014
3
Philips Semiconductors Product specification
FUNCTION
74ALVCH1664616-bit bus transceiver/register (3-State)
LOGIC DIAGRAM (one section)
OE
DIR
S
BA
CP
BA
S
AB
CP
AB
V
CC
S
YD
1
An
MUX
D
QD
2
FF
n
CP
V
CC
S
YD
1
8 IDENTICAL CHANNELS
CP
MUX
D
QD
FF
n
2
Bn
SY00012
FUNCTION TABLE
INPUTS DATA I/O *
nOE nDIR nCP
X
X
H
H
L
L
L
L
X
X
X
X
L
L
H
H
↑
X
↑
H or L↑H or LXX
X
X
X
H or LXX
* The data output functions may be enabled or disabled by various signals at the OE and DIR inputs. Data input functions are always enabled,
i.e., data at the bus inputs will be stored on every LOW-to-HIGH transition on the clock inputs.
un = unspecified
H = HIGH voltage level
L = LOW voltage level
X = don’t care
↑ = LOW-to-HIGH level transition
AB
nCP
BA
X
↑
X
H or LXX
nS
X
X
L
H
AB
nS
BA
X
X
X
X
L
H
X
X
nAx nBx
input
un*
un*
input
input input
output input
input output
store A, B unspecified*
store B, A unspecified*
store A and B data, isolation
hold storage
real-time B data to A bus
stored B data to A bus
real-time A data to B bus
stored A data to B bus
1998 Sep 03
4
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