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4-BIT REGISTER
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT191T (25 Series) PI74FCT2191T
High Speed CMOS Presettable Synchronous 4-Bit Binary Counters
Product Features
* PI74FCT191/2191T is pin compatible with bipolar FASTTM Series at a higher speed and lower power consumption * 25 series resistor on all outputs (FCT2XXX only) * TTL input and output levels * Low ground bounce outputs (25 series only) * Extremely low static power * Hysteresis on all inputs * Industrial operating temperature range: -40C to +85C * Packages available: - 16-pin 150 mil wide plastic QSOP (Q) - 16-pin 300 mil wide plastic SOIC (S)
Product Description
Pericom Semiconductor's PI74FCT series of logic circuits are produced in the Company's advanced 0.6 micron CMOS technology, achieving industry leading speed grades. All PI74FCT2XXX devices have a built-in 25 ohm series resistor on all outputs to reduce noise due to reflections, thus eliminating the need for an external terminating resistor. The PI74FCT191T is a high speed CMOS 4-bit binary up/down counter. It has a single clock with clock enable and up/down control inputs and ripple carry output. The 191 has asynchronous preload inputs which override the count inputs. All inputs have clamp diodes for undershoot noise suppression. All outputs have ground bounce suppression.
Logic Block Diagram
U/D CE D0-D3 PL CP
Cup Q+Cup - Cdn Cdn =F =0
Q3-Q0
25 (FCT2XXX ONLY)
TC
25 (FCT2XXX ONLY)
RC
25 (FCT2XXX ONLY)
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Product Pin Configurations (All Pins Top View)
Truth Table(1)
Inputs PL U/D CP L X X H L H H H X X H L H L H L X H H H H H H H X Notes: 1. H = High Voltage Level L = Low Voltage Level X = Dont Care Z = High Impedance CE X L L H L L X L L X DI D3- D0 X X X X X X X X X Outputs Q3-Q0 D3- D0 Q +1 Q- 1 Q F F 0- E 0 0 1- F TC X L L X H H L H H L RC X H H X H H H H Function Load Data Count Up Count Down Count Inhibit Count Up = 1111 Count Up = 1111 Count Up 1111 Count Down = 0000 Count Down = 0000 Count Down 0000
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT191T (25 SERIES) PI74FCT2191T 4-BIT BINARY COUNTERS
Product Pin Description
Pin Name D3- D0 Q3- Q0 I/O I O I I I I O O De s cription Data Inputs Data Outputs Preload Up/Down Select Count Enable Count Clock Terminal Count Ripple Clock
D1 Q1 Q0 CE U/D Q2 Q3 GND
1 2 3 4 5 6 7 8
16 15 14
VCC D0 CP RC TC PL D2 D3
PL U/D CE CP TC RC
16-Pin Q16 S16
13 12 11 10 9
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Maximum Ratings Maximum Ratings life may be impaired. For user guidelines, not tested.) (Above which the useful
(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 ......................................................................................... 0.5W 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 = 5.0V 5%)
Parameters VOH VOL VOL VIH VIL IIH IIL VIK IOFF IOS VH Description Test Conditions(1) IOH = -15.0 mA IOL = 48 mA IOL = 12 mA (25 Series) 2.0 0.8 VIN = VCC VIN = GND -0.7 -- -60 -- -120 200 1 -1 -1.2 100 Min. Typ(2) Max. Units 2.4 3.0 0.3 0.3 0.50 0.50 V V V V V A A V A mA mV Output HIGH Voltage VCC = Min., VIN = VIH or VIL Output LOW Current Output LOW Current Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current Clamp Diode Voltage Power Down Disable Short Circuit Current Input Hysteresis VCC = Min., VIN = VIH or VIL VCC = Min., VIN = VIH or VIL Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VCC = Max. VCC = Min., IIN = -18 mA VCC = GND, VOUT = 4.5V VCC = Max. , VOUT = GND
(3)
Capacitance (TA = 25C, f = 1 MHz)
Parameters(4) CIN COUT Description Input Capacitance Output Capacitance Test Conditions VIN = 0V VOUT = 0V Typ 6 8 Max. 10 12 Units pF pF
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 = 5.0V, +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 determined by device characterization but is not production tested.
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT191T (25 SERIES) PI74FCT2191T 4-BIT BINARY COUNTERS
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Power Supply Characteristics
Parameters ICC ICC ICCD Description Quiescent Power Supply Current Supply Current per Input @ TTL HIGH Supply Current per Input per MHz(4) Test Conditions(1) Min. VCC = Max. Freq = 0 VCC = Max. Freq = 0 VCC = Max., Outputs Open and Enabled One Bit Toggling 50% Duty Cycle, other input at GND or VCC Vcc=Max., Outputs Open Preset Mode PL=CE=U/D=CP=GND One Bit Toggling at fi = 5MHz 50% Duty Cycle Vcc=Max., Outputs Open Preset Mode PL=CE=U/D=CP=GND Four Bits Toggling at fi = 5MHz 50% Duty Cycle VIN VHC; VIN VLC VIN = 3.4V(3) VIN = VCC VIN = GND Typ(2) Max. 0.1 0.5 0.15 Units 500 2.0 0.25 A mA mA/ MHz
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device. 2. Typical values are at VCC = 5.0V, +25C ambient. 3. Per TTL driven input (VIN = 3.4V); 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 ICC = Power Supply Current for a TTL High Input (VIN = 3.4V) 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) fI = Input Frequency NI = Number of Inputs at fI All currents are in milliamps and all frequencies are in megahertz.
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT191T (25 SERIES) PI74FCT2191T 4-BIT BINARY COUNTERS
Ic
Total Power Supply Current(6)
VIN = Vcc VIN = GND VIN = 3.4V VIN = GND
--
0.8
2.3
mA
--
1.0
3.3
VIN = Vcc VIN = GND VIN = 3.4V VIN = GND
--
3.0
6.0(5)
--
4.0
10.0(5)
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Switching Characteristics (Over Operating Range)
191T 2191T 191AT 2191AT M in. M ax. 2.5 3.0 2.5 2.0 2.0 3.0 2.0 3.0 7.8 11.8 8.5 7.2 9.8 7.2 9.1 8.5 191CT M ax. 6.9 10.2 8.0 6.8 9.0 6.8 8.5 7.8 ns
Notes: 1. See Test Circuit and Waveforms. 2. Minimum limits are guaranteed but not tested on Propgation Delays. 3. This parameter guaranteed but not production tested.
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT191T (25 SERIES) PI74FCT2191T 4-BIT BINARY COUNTERS
Symbol tCPQ tCPTC tCPRC tCERC tUDRC tUDTC tDQ tPLQ
D e s cription(1) Propagation Delay CP TO Q i Propagation Delay CP to TC Propagation Delay CP to RC Propagation Delay CE to RC Propagation Delay U/D to RC Propagation Delay U/D to TC Propagation Delay Di to Q i Propagation Delay PL to Q i
Conditions
M in. 2.5 3.0 2.5 2.0
M a.x 12 14 8.5 8.0 15 11 14 13
M in. 2.0 2.5 2.0 1.5 2.0 2.0 2.0 2.0
Unit
CL = 50 pF RL = 500
4.0 3.0 2.0 3.0
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Timing Characteristics (Over Operating Range)
191T 2191T 191AT 2191AT M in. M ax. 4.0 1.5 9.0 0 10 0 4.0 5.5 5.0 191CT 2191CT M in. M ax. 4.0 1.5 9.0 0 10 0 4.0 5.5 5.0 ns
Notes: 1.See Test Circuit and Waveforms. 2. Minimum limits are guaranteed but not tested on Propagation Delays. 3. This parameter guaranteed but not production tested.
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT191T (25 SERIES) PI74FCT2191T 4-BIT BINARY COUNTERS
Symbol tDPLS tDPLH tCS tCH tUDCPS tUDCPH tCPW tPL tPLCPR
De s cription Di to PL Setup Di to PL Hold CE to CP Setup CE to CP HoId U/D to CP Setup U/D to CP Hold Clock Pulse(1) Width HIGH or LOW PL LOW PL to CP Recovery
Conditions
M in. 5.0 1.5 10 0
M ax.
Unit
CL = 50 pF RL = 500
12 0 5.0 6.0 6.0
Pericom Semiconductor Corporation 2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
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PS2084B 01/13/97

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