Document
AT16373
Features
• • • • • • •
Fastest Propagation Speeds in the Industry TPD (F grade) = 2.5 ns, TPD (G grade) = 2.0 ns Maximum derating for capacitive loads 1.5ns/100 pF (F grade) and 1.1ns/100 pF (G grade) Very low ground bounce < 0.6V @ VCC =5.00V, Ta=25°C Excellent noise rejection Typical output skew ≤0.25ns Bus Hold circuitry to retain last active state during Tri-state™ Available in SSOP and TSSOP packages
Description
Atmel’s AT16373 devices provide maximum speed in temporary data storage. They can be operated as either two separate 8 bit latches or as a single 16-bit latch by use of the output enable and the latch enable. The AT16373 has very low ground bounce and excellent input noise rejection, giving the user stable signals in a high speed environment. These devices can drive very large loads while operating in a high speed transparent mode.
AT16373 Fast Logic™ 16-Bit Transparent Latch AT16373F AT16373G
Functional Block Diagram (1)
Note: 1. This 8-bit latch function is repeated a second time on each device.
Pin Configurations
Pin Names xOE xLE xDχ xOχ Descriptions Output Enable Input (Active Low) Latch Enable Inputs (Active High) Data Inputs Tri-State Outputs
1OE 1O2 1O3 VCC 1O6 1O7 2O1 GND 2O4 2O5 GND 2O8 1O1 GND 1O4 1O5 GND 1O8 2O2 2O3 VCC 2O6 2O7 2OE 1 3 5 7 9 11 13 15 17 19 21 23
SSOP/TSSOP
2 4 6 8 10 12 14 16 18 20 22 24 48 46 44 42 40 38 36 34 32 30 28 26 47 45 43 41 39 37 35 33 31 29 27 25 1D1 GND 1D4 1D5 GND 1D8 2D2 2D3 VCC 2D6 2D7 2LE 1LE 1D2 1D3 VCC 1D6 1D7 2D1 GND 2D4 2D5 GND 2D8
Top View
0756B
5-15
Function Table(1)
Inputs xDχ H L X
Note: 1. X = Don’t Care, Z = High Impedance
Outputs xOE L L H xOχ H L Z
xLE H H X
Absolute Maximum Ratings*
Operating Temperature........................ 0°C to +70°C Storage Temperature...................... -65°C to +150°C Voltage on any Pin with Respect to Ground .................. -2.0V to +7.0V(1) Maximum Operating Voltage ............................. 6.0V
*NOTICE: Stresses beyond those listed under “Absolute 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 beyond those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Notes: 1. Minimum voltage is -0.6V dc which may undershoot to -2.0V for pulses of less than 20 ns. Maximum output pin voltage is VCC +0.75V dc which may overshoot to +7.0V for pulses of less than 20 ns.
5.0 Volt DC Characteristics
Applicable over recommended operating range from Ta = 0°C to +70°C, VCC = +5.0V +/- 5% (unless otherwise noted) Units Symbol ∆ ICC V IH VIL IIH IIL IOZ V OH(1) Parameter Quiescent Power Supply Current Input High Voltage Input Low Voltage Input High Current Input Low Current Output Leakage Current Output High Voltage F Grade only Output High Voltage G Grade only Output Low Voltage (F Grade) Output Low Voltage (G Grade) VCC = 4.75V IOH = -10 mA VCC = 4.75V IOH = -12 mA IOL = 10 mA IOL = 12 mA 2.7 2.7 0.55 0.55 VIN = VCC VIN = GND Test Conditions VCC = Max, VIN = 3.4V 2.0 0.8 ±15 ±15 ±10 Min Typ 0.8 Max 1.2 mA V V µA µA µA V V V V
V OH(2) VOL VOL
Note: 1. F grade: At VCC (max), the value of VOH(max) = 3.75V and at VCC(min), VOH(max) = 3.25V 2. G grade: At VCC (max), the value of VOH(max) = 3.75V and at VCC(min), VOH(max) = 3.35V
5-16
AT16373
AT16373
AC Characteristics AT16373F
Applicable over recommended operating range from Ta = 0°C to +70°C, VCC = 5.0V +/- 5% (unless otherwise noted) Symbol tPHL tPLH tPHL tPLH tPZH tPZL tPHZ tPLZ tSK(2) ∆tPHL(2) ∆ tPLH tsu tH Parameter Propagation Delay xDχ to xOχ Propagation Delay xLE to xOχ Output Enable Output Disable Output Skew Propagation Delay vs Output Loading Set-up Time Hold Time CL = 50 pF CL = 50 pF 2.0 2.0 Test Conditions(1) CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF 1.3 Min Typ Max 2.5 5.5 8.8 6.5 0.5 1.5 Units ns ns ns ns ns ns/100 pF ns ns
Note: 1. See test circuit and waveforms. 2. This parameter is guaranteed but not 100% tested.
AT16373G
Applicable over recommended operating range from Ta = 0°C to +70°C, VCC = 5.0V +/- 5% (unless otherwise noted) Symbol tPHL tPLH tPHL tPLH tPZH tPZL tPHZ tPLZ tSK(2) ∆tPHL(2) ∆tPLH tsu tH Parameter Propagation Delay xDχ to xOχ Propagation Delay xLE to xOχ Output Enable Output Disable Output Skew Propagation Delay vs Output Loading Set-up Time Hold Time CL = 50 pF CL = 50 pF 2.0 2.0 Test Conditions(1) CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF CL = 50 pF 0.9 Min Typ Max 2.0 5.0 8.8 Units ns ns ns ns ns ns/100 pF ns ns
6.0 0.5 1.1
Note: 1. See test circuit and waveforms. 2. This parameter is guaranteed but not 100% tested.
5-17
Test Circuits(1,2)
VCC
7.0V
Switch Position
Test Open Drain Disable Low Enable Low All Other Tests
50 pF 500Ω
Switch Closed Open
VIN Pulse Generator RT
D.U.T.
VOUT
500Ω
CL
Definitions: CL = Load capacitance; Includes jig and .