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PI74LPT16373
Fast CMOS 3.3V 16-Bit Transparent Latch
Features
* Compatible with LCXTM and LVTTM families of products * Supports 5V Tolerant Mixed Signal Mode Operation - Input can be 3V or 5V - Output can be 3V or connected to 5V bus * Advanced Low Power CMOS Operation * Excellent output drive capability: Balanced drives (24 mA sink and source) * Pin compatible with industry standard double-density pinouts * Low ground bounce outputs * Hysteresis on all inputs * Industrial operating temperature range: -40C to +85C * Multiple center pins and distributed Vcc/GND pins minimize switching noise * Packaging (Pb-free & Green available): - 48-pin 240-mil wide thin plastic TSSOP (A) - 48-pin 300-mil wide plastic SSOP (V)
Description
Pericom Semiconductor's PI74LPT16373 is a 16-bit transparent latch designed with 3-state outputs and are intended for bus oriented applications. The Output Enable and Latch Enable controls are organized to operate as two 8-bit latches or one 16-bit latch. When Latch Enable (LE) is HIGH, the flip-flops appear transparent to the data. The data that meets the set-up time when LE is LOW is latched. When OE is HIGH, the bus output is in the high impedance state. The PI74LPT16373 can be driven from either 3.3V or 5.0V devices allowing this device to be used as a translator in a mixed 3.3/5.0V system.
Block Diagram
1OE
2OE
1LE
2LE
1D0
D
1O0
2D0
D
2O0
C
C
TO 7 OTHER CHANNELS
TO 7 OTHER CHANNELS
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PI74LPT16373 3.3V 16-Bit Transparent Latch Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ............................................................. -55C to +125C Ambient Temperature with Power Applied ............................ -40C to +85C Supply Voltage to Ground Potential (Inputs & VCC Only)...... -0.5V to +7.0V Supply Voltage to Ground Potential (Outputs & D/O Only) ... -0.5V to +7.0V DC Input Voltage ..................................................................... -0.5V to +7.0V DC Output Current............................................................................... 120 mA Power Dissipation .................................................................................... 1.0W
Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
Pin Configuration
1OE 1O0 1O1
Truth Table
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25
1LE 1D0 1D1
Inputs(1) xLE H H X xOE L L H
Outputs(1) xOx H L Z
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
xDx H L X
GND
1O2 1O3
GND
1D2 1D3
VCC
1O4 1O5
VCC
1D4 1D5
Notes: 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance
GND
1O6 1O7 2O0 2O1
GND
1D6 1D7 2D0 2D1
Pin Description
Pin Name xOE xLE xDx xOx GND VCC Description 3-State Output Enable Inputs (Active LOW) Latch Enable Inputs (Active HIGH) Data Inputs 3-State Outputs Ground Power
GND
2O2 2O3
GND
2D2 2D3
VCC
2O4 2O5
VCC
2D4 2D5
GND
2O6 2O7 2OE
GND
2D6 2D7 2LE
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PI74LPT16373 3.3V 16-Bit Transparent Latch
Capacitance (TA = 25C, f = 1 MHz)
Parameters(1) CIN COUT Description Input Capacitance Output Capacitance Test Conditions VIN = 0V VOUT = 0V Typ 4.5 5.5 Max. 6 8 Units pF
Notes: 1. This parameter is determined by device characterization but is not production tested.
DC Electrical Characteristics (Over the Operating Range, TA = -40C to +85C, VCC = 2.7V to 3.6V)
Parameters VIH VIL IIH IIL IOZH IOZL VIK IODH IODL Description Input HIGH Voltage (Input pins) Input HIGH Voltage (I/O pins) Input LOW Voltage (Input and I/O pins) Input HIGH Current (Input pins) Input HIGH Current (I/O pins) Input LOW Current (Input pins) Input LOW Current (I/O pins) High Impedance Output Current (3-State Output pins) Clamp Diode Voltage Output HIGH Current Output LOW Current Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VCC = Max. VCC = Max. VCC = Max. VCC = Max. VCC = Max. VCC = Min., IIN = -18mA VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) VCC = Min. VIN = VIH or VIL VCC = 3.0V, VIN = VIH or VIL VCC = Min. VOL IOS IOFF VH Output LOW Voltage Short Circuit Current(4) VIN = VIH or VIL -36 50 VIN = 5.5V VIN = VCC VIN = GND VIN = GND VOUT = 5.5V VOUT = GND -0.7 -60 90 Min. 2.2 2.0 -0.5 Typ(2) Max. 5.5 5.5 0.8 1 1 1 1 1 1 -1.2 -110 mA 200 V A V Units
VOH
Output HIGH Voltage
IOL = -0.1 mA VCC-0.2 IOL = -3 mA 2.4 IOL = -8 mA IOL = -24 mA IOL = 0.1 mA IOL = 16 mA IOL = 24 mA -60 2.4(5) 2.0
3.0 3.0 V 0.2 0.2 0.3 -85 150 0.4 0.5 -240 100 mA A mV
VCC = Max.(3), VOUT = GND VCC = 0V, VIN or VOUT 4.5V
Power Down Disable Input Hysteresis
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 3.3V, +25C ambient and maximum loading. 3. Not more than one output should be shorted at one time. Duration of the test should not exceed one second. 4. This parameter is guaranteed but not tested. 5. VOH = VCC - 0.6V at rated current.
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PI74LPT16373 3.3V 16-Bit Transparent Latch Power Supply Characteristics
Parameters ICC ICC Description Quiescent Power Supply Current Quiescent Power Supply Current TTL Inputs HIGH Test Conditions(1) VCC = Max. VCC = Max. VCC = Max., Outputs Open XOE = GND xLE = Vcc One Bit Toggling 50% Duty Cycle VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle XOE = GND One Bit Toggling VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle XOE = GND 16 Bits Toggling VIN = GND or VCC VIN = VCC - 0.6V(3) Min. Typ(2) 0.1 Max. 10 A 500 Units
ICCD
Dynamic Power Supply(4)
VIN = VCC VIN = GND
50
75
A/ MHz
VIN = VCC - 0.6V VIN = GND
0.6
XLE
= VCC
2.3
IC
Total Power Supply Current(6)
mA VIN = VCC - 0.6V VIN = GND 2.1
XLE
=
4.7(5)
VCC
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at VCC = 3.3V, +25C ambient. 3. Per TTL driven input; all other inputs at Vcc or GND. 4. This parameter is not directly testable, but is derived for use in Total Power Supply Calculations. 5. Values for these conditions are examples of the Icc formula. These limits are guaranteed but not tested. 6. IC =IQUIESCENT + IINPUTS + IDYNAMIC IC = ICC + ICC DHNT + ICCD (fCP/2 + fINI) ICC = Quiescent Current (ICCL, ICCH and ICCZ) ICC = Power Supply Current for a TTL High Input DH = Duty Cycle for TTL Inputs High NT = Number of TTL Inputs at DH ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL) fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices) NCP = Number of Clock Inputs at fCP fI = Input Frequency NI = Number of Inputs at fI All currents are in milliamps and all frequencies are in megahertz.
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PI74LPT16373 3.3V 16-Bit Transparent Latch Switching Characteristics over Operating Range(1)
LPT16373 Parameters tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ tSU tH tW tSK(O) Description Propagation Delay xDx to xOx Propagation Delay xLE to xOx Output Enable Time xOE to xOx Output Disable Time(3) xOE to xOx Setup Time HIGH or LOW, xDx to xLE Hold Time HIGH or LOW, xDx to xLE xLE Pulse Width(3) HIGH Output Skew(4) CL = 50pF RL = 500 Conditions Com. Min(2) 1.5 2.0 1.5 1.5 2.0 1.5 6.0 0.5 Max 7.0 7.0 7.2 7.2 LPT16373A Com. Min(2) 1.5 2.0 1.5 1.5 2.0 1.5 5.0 0.5 Max 5.2 6.5 6.5 5.5 LPT16373C Com. Min(2) 1.5 2.0 1.5 1.5 2.0 1.5 5.0 0.5 Max 4.2 5.5 5.5 5.0 ns Units
Notes: 1. Propagation Delays and Enable/Disable times are with VCC = 3.3V 0.3V, normal range. For VCC = 2.7V, extended range, all Propagation Delays and Enable/Disable times should be degraded by 20%. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. This parameter is guaranteed but not production tested. 4. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
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PI74LPT16373 3.3V 16-Bit Transparent Latch Packaging Mechanical: 48-pin TSSOP (A)
48
.236 .244
6.0 6.2
1
.488 12.4 .496 12.6
.047 1.20 Max
SEATING PLANE
.004 0.09 .008 0.20
X.XX X.XX
DENOTES DIMENSIONS IN MILLIMETERS
.0197 BSC 0.50
.007 .010
0.17 0.27
.002 .006 0.05 0.15
0.45 .018 0.75 .030
.319 BSC 8.1
Packaging Mechanical: 48-pin SSOP (V)
48
.291 .299 7.39 7.59
.395 .420 10.03 10.67
Gauge Plane .010 0.25
1
.02 0.51 .04 1.01
.620 .630 15.75 16.00 .015 0.381 x 45 .025 0.635
.008 0.20 Nom.
.110 2.79 Max
.025 BSC 0.635 X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS .008 0.20 .0135 0.34
0-8
.008 0.20 .016 0.40
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PI74LPT16373 3.3V 16-Bit Transparent Latch Ordering Information
Ordering Code PI74LPT16373A PI74LPT16373AA PI74LPT16373AV PI74LPT16373AVE PI74LPT16373CA PI74LPT16373CV PI74LPT16373CVE
Notes:
Package Code A A V V A V V
Speed Grade Blank A A A C C C
Description 48-pin 173 mil wide plastic TSSOP 48-pin 173 mil wide plastic TSSOP 48-pin 300 mil wide plastic SSOP Pb-free & Green, 48-pin 300 mil wide plastic SSOP 48-pin 173 mil wide plastic TSSOP 48-pin 300 mil wide plastic SSOP Pb-free & Green, 48-pin 300 mil wide plastic SSOP
* Thermal characteristics can be found on the company web site at www.pericom.com/packaging/ * E = Pb-free & Green * Adding an X suffix = Tape/Reel
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
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