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Part: PI74FCT16841TA
Category:
Logic
-> Latches
-> CMOS/BiCMOS->FCT/FCT-T Family
Description: Fast CMOS 20-bit Sb-transparent Latch
Company: Pericom Semiconductor Corporation
Datasheet: Download PI74FCT16841TA datasheet File size : 313 kB
Request For quote: Find where to buy PI74FCT16841TA
Datasheet text preview:
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321 21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16841T/162841T 20-BIT TRANSPARENT LATCH
PI74FCT16841T PI74FCT162841T
Fast CMOS 20-Bit Transparent Latch
Product Features:
Common Features: · PI74FCT16841T and PI74FCT162841T are high-speed, low power devices with high current drive · VCC = 5V ±10% · Hysteresis on all inputs · Packages available: 56-pin 240 mil wide plastic TSSOP (A) 56-pin 300 mil wide plastic SSOP (V) PI74FCT16841T Features: · High output drive: IOH = 32 mA; IOL = 64 mA · Power off disable outputs permit "live insertion" · Typical VOLP (Output Ground Bounce) < 1.0V at VCC = 5V, TA = 25°C PI74FCT162841T Features: · Balanced output drivers: ±24 mA · Reduced system switching noise · Typical VOLP (Output Ground Bounce) < 0.6V at VCC = 5V, TA = 25°C
1 2
Product Description:
Pericom Semiconductor's PI74FCT series of logic circuits are produced in the Company's advanced 0.8 micron CMOS technology, achieving industry leading speed grades. The PI74FCT16841T and PI74FCT162841T are 20-bit wide transparent latches designed to provide temporary storage of data and can be used as I/O ports, memory address latches, and bus drivers. The Output Enable and Latch Enable controls allow the devices to be operated as two 10-bit latches or one 20-bit latch. Signal pins are arranged in a flow-through organization for ease of layout and hysteresis is designed into all inputs to improve noise margin. The output buffers on the PI74FCT16841T and PI74FCT162841T are especially designed for driving high-capacitance loads and low impedance backplanes and include a Power-Off Disable function allowing "live insertion" of boards when the devices are used as backplane drivers. The PI74FCT162841T has ±24 mA balanced output drivers. It is designed with current limiting resistors at its outputs to control the output edge rate resulting in lower ground bounce and undershoot. This eliminates the need for external terminating resistors for most interface applications.
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Logic Block Diagram
1OE 1LE 1D1
2OE 2LE
10
D C
2Q1
D C
1Q1
2D1
11 12 13
To 9 other channels
To 9 other channels
14 15
1
PS2078A 01/15/95
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16841T/162841T 20-BIT TRANSPARENT LATCH
Product Configuration
1OE 1 Q1 1 Q2
Product Pin Description
56 55 54 53 52 51 50 49 48 47
1LE 1D1 1D2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
GND 1 Q3
1 Q4
GND
1D3 1D4
Pin Name xDx xLE xOE xQx
Description Data Inputs Latch Enable Input (Active LOW) Output Enable Input (Active LOW) 3-State Outputs
VCC 1 Q5 1 Q6 1 Q7 GND 1 Q8 1 Q9 1Q10 2 Q1
2 Q2 2 Q3 GND 2 Q4 2 Q5 2 Q6
VCC
1D5 1D6 1D7
46 45 44 56-PIN V56 43 A56 42 41 40 39 38 37 36 35 34 33 32 31 30 29
GND
1D8 1D9 1D10 2D1 2D2 2D3
Truth Table(1)
Inputs Outputs
xDx H L X X 1.
xLE H H L X
xOE L L L H
xQx H L Q(2) Z
GND
2D4 2D5 2D6
VCC 2 Q7 2 Q8 GND
2 Q9 2Q10 2OE
VCC 2D7 2D8 GND
2D9 2D10 2LE
2.
H = High Voltage Level L = Low Voltage Level X = Don't Care Z = High Impedance Output level before xLE HIGH-to-LOW Transition.
2
PS2078A 01/15/95
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI74FCT16841T/162841T 20-BIT TRANSPARENT LATCH
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.) Storage Temperature .......... 65°C to +150°C Ambient Temperature with Power Applied ... 40°C to +85°C 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.
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0.55 ±100 V µA
DC Electrical Characteristics (Over the Operating Range, TA = 40°C to +85°C, VCC = 5.0V ± 10%)
Parameters Description VIH VIL IIH IIL IOZH IOZL VIK IOS IO VH Input HIGH Voltage Input LOW Voltage Input HIGH Current Input LOW Current High Impedance Output Current Clamp Diode Voltage Short Circuit Current Output Drive Current Input Hysteresis Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max. VCC = Max. VCC = Max. VCC = Max. VCC = Min., IIN = 18 mA VCC = Max.(3), VOUT = GND VCC = Max.(3), VOUT = 2.5V Min. 2.0 VIN = VCC VIN = GND VOUT = 2.7V VOUT = 0.5V 80 50 0.7 140 100 0.8 1 1 1 1 1.2 200 180 Typ(2) Max. Units V V µA µA µA µA V mA mA m V
PI74FCT16841T Output Drive Characteristics (Over the Operating Range)
Parameters Description VOH Output HIGH Voltage Test Conditions(1) VCC = Min., VIN = VIH or VIL IOH = 3.0 mA IOH = 15.0 mA IOH = 32.0 mA IOL = 64 mA Min. 2.5 2.4 2.0 -- Typ(2) 3.5 3.5 3.0 0.2 -- Max. Units V
VOL IOFF
Output LOW Voltage Power Down Disable
VCC = Min., VIN = VIH or VIL VCC = 0V, VIN or VOUT 4.5V
10 11 12 13
PI74FCT162841T Output Drive Characteristics (Over the Operating Range)
Parameters Description VOH VOL I ODL I ODH Output HIGH Voltage Output LOW Voltage Output LOW Current Output HIGH Current Test Conditions(1) VCC = Min., VIN = VIH or VIL IOH = 24.0 mA VCC = Min., VIN = VIH or VIL IOL = 24 mA VCC = 5V, VIN = VIH OR VIL, VOUT = 1.5V(3) VCC = 5V, VIN = VIH OR VIL, VOUT = 1.5V(3) Min. 2.4 60 60 Typ(2) 3.3 0.3 115 115 Max. 0.55 150 150 Units V V mA mA
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(4) CIN C OUT Description Input Capacitance Output Capacitance Test Conditions VIN = 0V VOUT = 0V Typ 4.5 5.5 Max. 6 8 Units pF pF
14 15
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, +25°C 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.
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PS2078A 01/15/95
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