• Low inductance multiple power and ground pins for
minimum noise and ground bounce
• Direct interface with TTL levels
• Bus hold on data inputs
• Typical output ground bounce voltage:
V
<0.8VatVCC= 3.3 V and T
OLP
• Typical output undershoot voltage:
V
>2VatVCC= 3.3 V and T
OHV
• Power off disables outputs, permitting live insertion
• Packaged in plastic fine-pitch ball grid array package.
DESCRIPTION
The 74LVCH32373A is a high-performance, low-power,
low-voltage, Si-gate CMOS device, superior to most
advanced CMOS compatible TTL families.
amb
amb
=25°C
=25°C
74LVCH32373A
The 74LVCH32373A is a 32-bit transparent D-type latch
featuring separate D-type inputs for each latchand 3-state
outputs for bus oriented applications. One latch enable
(nLE) input and one output enable (nOE) are provided for
each octal. Inputs can be driven from either 3.3 or 5 V
devices.
The74LVCH32373A consists of 4 sectionsof eight D-type
transparent latches with 3-state true outputs. When input
nLE is HIGH, data at the nDn inputs enter the latches. In
this condition the latches are transparent, i.e. a latch
output will change each time its corresponding D-input
changes.
When input nLE is LOW the latches store the information
thatwas present at theD-inputs one set-up time preceding
the HIGH-to-LOW transition of nLE. When input nOE is
LOW, the contents of the eight latches are available at the
outputs. When input nOE is HIGH, the outputs go to the
high-impedance OFF-state. Operation of the nOE input
does not affect the state of the latches.
The 74LVCH32373A bus hold data input circuitseliminate
the need for external pull-up resistors to hold unused
inputs.
The inputs can be driven from either 3.3 or 5 V devices.
In 3-state operation, outputs can handle 5 V. These
features allow the use of these devices in a mixed
is used to determine the dynamic power dissipation (PDin µW).
PD
PD=CPD× V
= input frequency in MHz;
f
i
2
× fi+ Σ (CL× V
CC
2
× fo) where:
CC
fo= output frequency in MHz;
CL= output load capacitance in pF;
VCC= supply voltage in Volts;
Σ (CL× V
2
× fo) = sum of the outputs.
CC
1999 Nov 242
Page 3
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
74LVCH32373A
5 V tolerant inputs/outputs; 3-state
FUNCTION TABLE
See note 1.
OPERATING MODE
Enable and read register
(transparent mode)
Latch and read registerLLlLL
Latch register and disable
outputs
Note
1. H = HIGH voltage level;
h = HIGH voltage level one set-up time prior to the HIGH-to-LOW LE transition;
L = LOW voltage level;
l = LOW voltage level one set-up time prior to the HIGH-to-LOW LE transition;
Z = high-impedance OFF-state.
OEnLEnD
n
LHLLL
LHHHH
LLhHH
HL l LZ
HLhHZ
INPUTS
n
INTERNAL
LATCHES
OUTPUTS
nQ
n
ORDERING INFORMATION
TYPE NUMBER
74LVCH32373AEC−40 to +85 °C96LFBGA96plasticSOT536-1
PINNING
SYMBOLDESCRIPTION
nD
n
nLElatch enable inputs (active HIGH)
nQ
n
GNDground (0 V)
n
OEoutput enable inputs (active LOW)
V
CC
TEMPERATURE RANGEPINSPACKAGE MATERIALCODE
data inputs
data outputs
DC supply voltage
PACKAGE
1999 Nov 243
Page 4
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
5 V tolerant inputs/outputs; 3-state
handbook, full pagewidth
6
1D11D31D51D72D12D32D52D73D13D33D53D74D14D34D54D
5
1D01D21D41D62D02D22D42D63D03D23D43D64D04D24D44D
1LE2LE 3LEGNDGND GNDGND4LEV
4
1OE
32OE 3OEGNDGND GNDGND4OEV
1Q01Q21Q41Q62Q02Q22Q42Q63Q03Q23Q43Q64Q04Q24Q44Q
2
1Q11Q31Q51Q72Q12Q32Q52Q73Q13Q33Q53Q74Q14Q34Q54Q
1
AHJBDEGTCFKMNRLP
CC
CC
V
CC
V
CC
Fig.1 Pin configuration.
GNDGND GNDGNDV
GNDGND GNDGNDV
CC
CC
74LVCH32373A
MNA492
6
7
V
CC
V
CC
7
6
handbook, full pagewidth
1D
1LE
1OE
3D
3LE
3OE
0
0
DQ
LATCH 1
LE LE
to 7 other channels
DQ
LATCH 17
LE LE
to 7 other channels
1Q
3Q
2D
2LE
2OE
4D
4LE
4OE
0
0
0
0
DQ
LATCH 9
LE LE
to 7 other channels
DQ
LATCH 25
LE LE
to 7 other channels
2Q
0
4Q
0
MNA493
Fig.2 Logic symbol.Fig.2 Logic symbol.
1999 Nov 244
Page 5
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
5 V tolerant inputs/outputs; 3-state
data
input
V
CC
handbook, halfpage
74LVCH32373A
to internal circuit
MNA473
Fig.3 Bus hold circuit.
1999 Nov 245
Page 6
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
74LVCH32373A
5 V tolerant inputs/outputs; 3-state
RECOMMENDED OPERATING CONDITIONS
SYMBOLPARAMETERCONDITIONS
V
CC
DC supply voltagemaximum speed performance2.73.6V
low-voltage applications1.23.6V
V
I
V
O
DC input voltage05.5V
DC output voltageHIGH or LOW state0V
3-state05.5V
T
amb
operating ambient temperaturesee DC and AC characteristics
−40+85°C
per device
t
(∆t/∆f) input rise and fall timesVCC= 1.2 to 2.7 V020ns/V
r,tf
V
= 2.7 to 3.6 V010
CC
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134); voltages are referenced to GND (ground= 0 V).
SYMBOLPARAMETERCONDITIONSMIN.MAX.UNIT
V
CC
V
I
I
IK
I
OK
V
O
DC supply voltage−0.5+6.5V
DC input voltagenote 1−0.5+6.5V
DC input diode currentVI<0−−50mA
DC output diode currentVO>VCCor VO< 0; note 1−±50mA
DC output voltageHIGH or LOW state; note 1−0.5VCC+ 0.5V
3-state; note 1−0.5+6.5V
I
O
I
CC,IGND
T
stg
P
D
DC output source or sink currentVO=0toV
CC
−±50mA
DC VCC or GND current−±100mA
storage temperature−65+150°C
power dissipation per packagetemperaturerange −40 to +85 °C;
−1000mW
note 2
LIMITS
MIN.MAX.
CC
UNIT
V
Notes
1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. Above 70 °C the value of P
derates linearly with 1.8 mW/K.
D
1999 Nov 246
Page 7
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
74LVCH32373A
5 V tolerant inputs/outputs; 3-state
DC CHARACTERISTICS
Over recommended operating conditions; voltages are referenced to GND (ground=0V).
SYMBOLPARAMETER
TEST CONDITIONST
OTHERVCC(V)MIN.TYP.
V
IH
HIGH-level input voltage1.2V
CC
2.7 to 3.6 2.0−−
VILLOW-level input voltage1.2−−GND V
2.7 to 3.6 −−0.8
V
OH
HIGH-level output voltageVI=VIHor V
IL
IO= −12 mA2.7VCC− 0.5 −−V
I
=−100 µA3.0VCC− 0.2 V
O
I
= −18 mA3.0VCC− 0.6 −−
O
I
=−24 mA3.0VCC− 0.8 −−
O
V
OL
LOW-level output voltageVI=VIHor V
IL
IO= 12 mA2.7−−0.40V
= 100 µA3.0−−0.20
I
O
I
= 24 mA3.0−−0.55
O
I
I
input leakage currentVI= 5.5 Vor GND;
3.6−±0.1±5µA
note 2
I
OZ
3-state output OFF-state currentVI=VIHor VIL;
3.6−0.1±5µA
VO= 5.5 Vor GND
I
I
∆I
off
CC
CC
power off leakage supply current VIor VO= 5.5 V0.0−0.1±10µA
quiescent supply currentVI=VCCor GND; IO= 0 3.6−0.140µA
additional quiescent supply
VI=VCC− 0.6 V; IO= 02.7 to 3.6 −5500µA
current per input pin
I
BHL
bus hold LOW sustaining current VI= 0.8 V;
3.075−−µA
notes 3, 4 and 5
I
BHH
bus hold HIGH sustaining current VI= 2.0 V;
3.0−75−−µA
notes 3, 4 and 5
I
BHLO
I
BHHO
bus hold LOW overdrive currentnotes 3, 4 and 63.6500−−µA
bus hold HIGH overdrive currentnotes 3, 4 and 63.6−500−−µA
−40 to +85°C
amb
(1)
MAX.
−−V
CC
−
UNIT
Notes
1. All typical values are at V
= 3.3 V and T
CC
amb
=25°C.
2. For bus hold parts the bus hold circuit is switched off when VI exceeds VCC allowing 5.5 V on the input terminal.
3. Valid for data inputs of bus hold parts (LVCH32-A) only.
4. For data inputs only; control inputs do not have a bus hold circuit.
5. The specified sustaining current at the data input holds the input below the specified VI level.
6. The specified overdrive current at the data input forces the data input to the opposite logic input level.
1999 Nov 247
Page 8
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
5 V tolerant inputs/outputs; 3-state
AC CHARACTERISTICS
GND = 0 V; tr=tf≤2.5 ns; CL= 50 pF; RL= 500 Ω.
SYMBOLPARAMETER
t
PHL/tPLH
t
PZH/tPZL
t
PHZ/tPLZ
t
W
t
su
t
h
propagation delay
nDnto nQ
n
propagation delay
nLE to nQ
n
3-state output enable time
nOE to nQ
n
3-state output disable time
nOE to nQ
n
nLE pulse width HIGHsee Figs 5 and 82.73.0−−ns
set-up time nDn to nLEsee Figs 6 and 82.71.7−−ns
hold time nDn to nLEsee Figs 6 and 82.71.2−−ns
see Figs 4 and 82.71.5−5.7ns
see Figs 5 and 82.71.5−5.8ns
see Figs 7 and 82.71.5−6.5ns
see Figs 7 and 82.71.5−6.4ns
74LVCH32373A
TEST CONDITIONST
WAVEFORMSVCC(V)MIN.TYP.
3.0 to 3.61.53.04.7
3.0 to 3.61.53.44.8
3.0 to 3.61.53.55.5
3.0 to 3.61.53.95.4
3.0 to 3.63.02.0−
3.0 to 3.6+1.7−0.1−
3.0 to 3.61.20.1−
= −40 to +85 °C
amb
(1)
MAX.
UNIT
Note
1. All typical values are measured at V
= 3.3 V and T
CC
AC WAVEFORMS
GND
V
OH
V
OL
V
I
handbook, halfpage
nDn input
nQn output
VM= 1.5 V at VCC≥ 2.7 V;
VM= 0.5 × VCCat VCC< 2.7 V;
VOL and VOH are typical output voltage drop that occur with the output load.
amb
V
M
=25°C.
t
PHL
V
M
t
PLH
MNA494
Fig.4 Input (nDn) to output (nQn) propagation delay times.
1999 Nov 248
Page 9
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
5 V tolerant inputs/outputs; 3-state
GND
V
OH
V
OL
V
I
V
M
t
PHL
handbook, full pagewidth
nLE input
nQn output
VM= 1.5 V at VCC≥ 2.7 V;
VM= 0.5 × VCCat VCC< 2.7 V;
VOL and VOH are typical output voltage drop that occur with the output load.
74LVCH32373A
V
M
t
W
t
PLH
V
M
MNA495
Fig.5 Latch enable inputs (nLE) pulse width and the latch enable input to outputs (nQn) propagation delay times.
GND
GND
V
I
V
M
t
h
t
su
V
I
V
M
t
t
h
su
MNA496
handbook, full pagewidth
nDn input
nLE input
VM= 1.5 V at VCC≥ 2.7 V;
VM= 0.5 × VCCat VCC< 2.7 V.
Fig.6 Set-up and hold times for inputs (nDn) to inputs (nLE).
1999 Nov 249
Page 10
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
5 V tolerant inputs/outputs; 3-state
GND
V
CC
V
OL
V
OH
GND
V
I
V
M
enabled
handbook, full pagewidth
nOE input
output
LOW-to-OFF
OFF-to-LOW
output
HIGH-to-OFF
OFF-to-HIGH
t
PLZ
t
PHZ
outputs
74LVCH32373A
t
PZL
V
M
V
X
t
PZH
V
Y
V
M
outputs
disabled
outputs
enabled
MNA478
VM= 1.5 V at VCC≥ 2.7 V;
VM= 0.5 × VCCat VCC< 2.7 V;
VX=VOL+ 0.3 V at VCC≥ 2.7 V;
VX=VOL+ 0.1 V at VCC< 2.7 V;
handbook, full pagewidth
TESTS1
t
PLH/tPHL
t
PLZ/tPZL
t
PHZ/tPZH
open
2 × V
GND
CC
VY=VOH− 0.3VatVCC≥ 2.7 V;
VY=VOH− 0.1VatVCC< 2.7 V;
VOLand VOHare typical output voltage drop that occur with the output load.
Fig.7 3-state output enable and disable times.
S1
V
PULSE
GENERATOR
V
V
CC
<2.7 VV
2.7 to 3.6 V2.7 V
CC
I
R
CC
D.U.T.
T
V
O
C
50 pF
V
I
Definitions for test circuit:
RL= load resistor.
CL= load capacitance including jig and probe capacitance.
RT= termination resistanceshould be equalto theoutputimpedance
of the pulse generator.
Z
o
R
L
500 Ω
R
L
L
500 Ω
2 × V
open
GND
MNA479
CC
Fig.8 Load circuitry for switching times.
1999 Nov 2410
Page 11
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
74LVCH32373A
5 V tolerant inputs/outputs; 3-state
PACKAGE OUTLINE
LFBGA96: plastic low profile fine-pitch ball grid array package; 96 balls; body 13.5 x 5.5 x 1.05 mm
D
ball A1
index area
A
2
E
detail X
A
A
1
SOT536-1
b
e
T
R
P
N
M
L
K
J
H
G
F
E
D
C
B
A
246135
DIMENSIONS (mm are the original dimensions)
A
UNIT
mm
max.
1.5
A
1bA2
0.41
0.31
1.2
0.9
0.51
0.41
5.6
5.4
D
13.6
13.4
∅ w
M
Z
D
Z
E
e
ye
0.1
Z
0.93
0.58
E
0.8
w
0.2v0.15
vA
Z
D
E
0.93
0.58
A
y
X
0510 mm
scale
OUTLINE
VERSION
SOT536-1
IEC JEDEC EIAJ
REFERENCES
1999 Nov 2411
EUROPEAN
PROJECTION
ISSUE DATE
98-11-25
99-06-03
Page 12
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
5 V tolerant inputs/outputs; 3-state
SOLDERING
Introduction to soldering surface mount packages
Thistextgives a very brief insight toacomplextechnology.
A more in-depth account of soldering ICs can be found in
our
“Data Handbook IC26; Integrated Circuit Packages”
(document order number 9398 652 90011).
There is no soldering method that is ideal for all surface
mount IC packages. Wave soldering is not always suitable
for surface mount ICs, or for printed-circuit boards with
high population densities. In these situations reflow
soldering is often used.
Reflow soldering
Reflow soldering requires solder paste (a suspension of
fine solder particles, flux and binding agent) to be applied
tothe printed-circuit board byscreenprinting, stencilling or
pressure-syringe dispensing before package placement.
Several methods exist for reflowing; for example,
infrared/convection heating in a conveyor type oven.
Throughput times (preheating,soldering and cooling) vary
between 100 and 200 seconds depending on heating
method.
Typical reflow peak temperatures range from
215 to 250 °C. The top-surface temperature of the
packages should preferable be kept below 230 °C.
Wave soldering
Conventional single wave soldering is not recommended
forsurfacemount devices (SMDs) or printed-circuit boards
with a high component density, as solder bridging and
non-wetting can present major problems.
To overcome these problems the double-wave soldering
method was specifically developed.
74LVCH32373A
If wave soldering is used the following conditions must be
observed for optimal results:
• Use a double-wave soldering method comprising a
turbulent wave with high upward pressure followed by a
smooth laminar wave.
• For packages with leads on two sides and a pitch (e):
– larger than or equal to 1.27 mm, the footprint
longitudinal axis is preferred to be parallel to the
transport direction of the printed-circuit board;
– smaller than 1.27 mm, the footprint longitudinal axis
must be parallel to the transport direction of the
printed-circuit board.
The footprint must incorporate solder thieves at the
downstream end.
• Forpackageswith leads on four sides, the footprint must
be placed at a 45° angle to the transport direction of the
printed-circuit board. The footprint must incorporate
solder thieves downstream and at the side corners.
During placement andbefore soldering, the package must
be fixed with a droplet of adhesive. The adhesive can be
applied by screen printing, pin transfer or syringe
dispensing. The package can be soldered after the
adhesive is cured.
Typical dwell time is 4 seconds at 250 °C.
A mildly-activated flux will eliminate the need for removal
of corrosive residues in most applications.
Manual soldering
Fix the component by first soldering two
diagonally-opposite end leads. Use a low voltage (24 V or
less) soldering iron applied to the flat part of the lead.
Contact time must be limited to 10 seconds at up to
300 °C.
When using a dedicated tool, all other leads can be
soldered in one operation within 2 to 5 seconds between
270 and 320 °C.
1999 Nov 2412
Page 13
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
74LVCH32373A
5 V tolerant inputs/outputs; 3-state
Suitability of surface mount IC packages for wave and reflow soldering methods
1. All surface mount (SMD) packages are moisture sensitive. Depending upon the moisture content, the maximum
2. These packages are not suitable for wave soldering as a solder joint between the printed-circuit board and heatsink
3. If wave soldering is considered, then the package must be placed at a 45° angle to the solder wave direction.
4. Wave soldering is only suitable for LQFP, TQFP and QFP packages with a pitch (e) equal to or larger than 0.8 mm;
5. Wave soldering is only suitable for SSOP and TSSOP packages with a pitch (e) equal to or larger than 0.65 mm; it is
, SO, SOJsuitablesuitable
temperature (with respect to time) and body size of the package, there is a risk that internal or external package
cracks may occur due to vaporization of the moisture in them (the so called popcorn effect). For details, refer to the
Drypack information in the
(at bottom version) can not be achieved, and as solder may stick to the heatsink (on top version).
The package footprint must incorporate solder thieves downstream and at the side corners.
it is definitely not suitable for packages with a pitch (e) equal to or smaller than 0.65 mm.
definitely not suitable for packages with a pitch (e) equal to or smaller than 0.5 mm.
Objective specificationThis data sheet contains target or goal specifications for product development.
Preliminary specificationThis data sheet contains preliminary data; supplementary data may be published later.
Product specificationThis data sheet contains final product specifications.
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
1999 Nov 2413
Page 14
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
5 V tolerant inputs/outputs; 3-state
74LVCH32373A
NOTES
1999 Nov 2414
Page 15
Philips SemiconductorsProduct specification
32-bit transparent D-type latch with
5 V tolerant inputs/outputs; 3-state
74LVCH32373A
NOTES
1999 Nov 2415
Page 16
Philips Semiconductors – a w orldwide compan y
Argentina: see South America
Australia: 3 Figtree Drive, HOMEBUSH, NSW 2140,
United States: 811 East Arques Avenue, SUNNYVALE, CA 94088-3409,
Tel. +1 800 234 7381, Fax. +1 800 943 0087
Uruguay: see South America
Vietnam: see Singapore
Yugoslavia: PHILIPS, Trg N. Pasica 5/v, 11000 BEOGRAD,
Tel. +381 11 62 5344, Fax.+381 11 63 5777
For all other countries apply to: Philips Semiconductors,
International Marketing & Sales Communications, Building BE-p, P.O. Box 218,
5600 MD EINDHOVEN, The Netherlands, Fax. +31 40 27 24825
The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed
without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license
under patent- or other industrial or intellectual property rights.
1999
Internet: http://www.semiconductors.philips.com
68
Printed in The Netherlands245004/01/pp16 Date of release: 1999 Nov 24Document order number: 9397 750 06466
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