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PI74LPT374
Fast CMOS 3.3V Octal D Flip-Flop
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 (24mA sink and source) * Low ground bounce outputs * Hysteresis on all inputs * Industrial operating temperature range: -40C to +85C * Packaging: - 20-pin 173-mil wide plastic TSSOP (L) - 20-pin 150-mil wide plastic QSOP (Q) - 20-pin 300-mil wide plastic SOIC (S)
Description
Pericom Semiconductor's PI74LPT374 8-bit wide octal resisters designed with eight D-type flip-flops, a buffered common clock, and buffered 3-state outputs. When output enable (OE) is LOW, the outputs are enabled. When OE is HIGH, the outputs are in the high impedance state. Input data meeting the setup and hold time requirements of the D inputs is transferred to the O outputs on the LOW-to-HIGH transition of the clock input. The PI74LPT374 can be driven from either 3.3V or 5.0V devices allowing for the device to be used as a translator in a mixed 3.3V/5.0V system.
Block Diagram
OE
CP
D0
Pin Configuration
OE O0 D0 D1 O1 O2 D2 D3 O3 GND 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 Vcc O7 D7 D6 O6 O5 D5 D4 O4 CP
D
O0
CP
TO 7 OTHER CHANNELS
Truth Table(1)
Inputs DN H L X CP X OE L L H Outputs ON H L Z
V
Pin Description
Pin Name OE CP D7-D0 O7-O0 GND VCC Description Output Enable Input (Active LOW) Clock Pulse, LOW-to-HIGH Transition Data Inputs 3-State Outputs Ground Power
Note: 1. H = High Voltage Level, X = Don't Care, L = Low Voltage Level, Z = High Impedance
1
PS8503A
10/06/04
PI74LPT374 Fast CMOS 3.3V Octal D Flip-Flop
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature ..........................................................-65C to +150C 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.
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) Min. 2.2 Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VIN= 5.5V VCC = Max. VIN = VCC VCC = Max. VIN = GND VCC = Max. VIN = GND VCC = Max. VOUT = 5.5V VCC = Max. VOUT = GND VCC = Min., IIN = -18 mA VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) VCC = 3.3V, VIN = VIH or VIL, VO = 1.5V(3) IOH = -0.1 mA VCC = Min. VIN = VIH or VIL IOH = -3 mA IOH = -8 mA VCC = 3.0V, VIN = VIH or VIL IOH = -24 mA VCC = Min. IOL = 0.1 mA IOL = 16 mA VIN = VIH or VIL IOL = 24 mA VCC = Max.(3), VOUT = GND VCC = 0V, VIN or VOUT 4.5V 2.0 -0.5
Typ(2) Max. 5.5 5.5 0.8 1 1 1 1 1 1 -1.2 -110
Units
V
A
-0.7 -36 50 VCC-0.2 2.4 2.4(5) 2.0 -60 90 3.0 3.0 0.2 0.3 -85 150
V mA
200
VOH
Output HIGH Voltage
V 0.2 0.4 0.5 -240 100
VOL IOS IOFF VH
Output LOW Voltage Short Circuit Current(4) Power Down Disable Input Hysteresis
-60
mA A mV
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.
2
PS8503A
10/06/04
PI74LPT374 Fast CMOS 3.3V Octal D Flip-Flop
Capacitance (TA = 25C, f = 1 MHz)
Parameters(1) CIN COUT Description Input Capacitance Output Capacitance VIN = 0V VOUT = 0V Test Conditions Typ 4.5 5.5 Max. 6 8 Units pF
Note: 1. This parameter is determined by device characterization but is not production tested.
Power Supply Characteristics
Parameters ICC ICC Description Quiescent Power Supply Current Quiescent Power Supply Current TTL Inputs HIGH Dynamic Power Supply(4)
Test Conditions(1) VCC = Max. VCC = Max. VCC = Max., Outputs Open OE = GND One Bit Toggling 50% Duty Cycle VCC = Max., Outputs Open fI = 10 MHZ 50% Duty Cycle OE = GND One Bit Toggling VCC = Max., Outputs Open fI = 2.5 MHZ 50% Duty Cycle OE = GND 8 Bits Toggling VIN = GND or VCC VIN = VCC - 0.6V(3) VIN = VCC VIN = GND
Min.
Typ(2) 0.1
Max. 10 500
Units A
ICCD
50
75
A/ MHz
VIN = VCC - 0.6V VIN = GND
0.6
2.3
IC
Total Power Supply Current(6)
mA VIN = VCC - 0.6V VIN = GND 4.7(5)
2.1
Notes: 1. For conditions shown as Max. or Min., 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, ICCV 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.
3
PS8503A
10/06/04
PI74LPT374 Fast CMOS 3.3V Octal D Flip-Flop
Switching Characteristics over Operating Range(1)
LPT374 Parameters FMAX tPLH tPHL tPZH tPZL tPHZ tPLZ tSU tH tW tSK(o) Description Maximum Clock Frequency Propagation Delay xCLK to xOx Output Enable Time(4) xOE to xOx Output Disenable Time xOE to xOx Setup time HIGH or LOW, xDx to xCLK HOLD time HIGH or LOW, xDx to xCLK xCLK Pulse Width(4) HIGH Output Skew(5) CL = 50pF RL = 500 Conditions(2) 150 2.0 1.5 1.5 2.0 1.5 7.0 0.5 8.0 8.5 8.5 Com. Min(3) Max Min(3) 150 2.0 1.5 1.5 2.0 1.5 5.0 0.5 4.5 5.5 5.0 ns LPT374C Com. Max MHz Unit
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. See test circuit and wave forms. 3. Minimum limits are guaranteed but not tested on Propagation Delays. 4. This parameter is guaranteed but not production tested. 5. Skew between any two outputs, of the same package, switching in the same direction. This parameter is guaranteed by design.
4
PS8503A
10/06/04
PI74LPT374 Fast CMOS 3.3V Octal D Flip-Flop Packaging Mechanical: 20-pin QSOP (Q)
20
.008 0.20 MIN.
.150 .157
3.81 3.99
Guage Plane
.008 .013 0.20 0.33
1
.010 0.254
.337 8.56 .344 8.74
Detail A
.016 .035 0.41 0.89
.041 1.04 REF
0-6
.058 REF 1.47
.053 1.35 .069 1.75
SEATING PLANE
.015 x 45 0.38
Detail A
.007 .010
.016 .050
0.41 1.27
0.178 0.254
.025 BSC 0.635
.008 0.203 .012 0.305
.004 0.101 .010 0.254
.228 .244 5.79 6.19
X.XX DENOTES DIMENSIONS X.XX IN MILLIMETERS
Packaging Mechanical: 20-pin SOIC (S)
20
.2914 .2992
7.40 7.60
.010 .029
1
.496 12.60 .511 12.99
0.254 x 45 0.737
0-8
.0091 .0125
0.23 0.32
.020 0.508 REF .030 0.762
0.41 .016 1.27 .050
.0926 .1043
2.35 2.65
SEATING PLANE
.394 .419 10.00 10.65
.050 BSC 1.27
.013 .020 0.33 0.51
.0040 .0118
0.10 0.30
X.XX DENOTES CONTROLLING X.XX DIMENSIONS IN MILLIMETERS
5
PS8503A
10/06/04
PI74LPT374 Fast CMOS 3.3V Octal D Flip-Flop
Packaging Mechanical: 20-pin TSSOP (L)
20
.169 .177
4.3 4.5
1
.252 .260 6.4 6.6
.004 0.09 .008 0.20
.047 1.20 Max
0.45 0.75
SEATING PLANE
.018 .030
.238 .269
6.1 6.7
.0256 BSC 0.65
.007 .012 0.19 0.30
.002 0.05 .006 0.15
X.XX X.XX
DENOTES CONTROLLING DIMENSIONS IN MILLIMETERS
Ordering Information
Ordering Code PI74LPT374L PI74LPT374CQ PI74LPT374CS PI74LPT374CL
Notes: 1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Package Code L Q S L
Speed Grade Blank C C C
Description 20-pin 173-mil wide plastic TSSOP 20-pin 150-mil wide plastic QSOP 20-pin 300-mil wide plastic SOIC 20-pin 173-mil wide plastic TSSOP
Pericom Semiconductor Corporation * 1-800-435-2336 * www.pericom.com
6
PS8503A 10/06/04

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