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IDT74GTLP816 GTLP / TTL 1:2 / 1:6 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
GTLP/TTL 1:2/1:6 CLOCK DRIVER
IDT74GTLP816 PRELIMINARY
FEATURES:
* * * * * * * * * * * * *
Interface between GTLP and TTL logic levels GTLP to TTL 1:6 fanout TTL to GTLP 1:2 fanout Edge Rate Control Circuit reduces output noise on GTLP port VREF pin provides reference voltage for receiver threshold CMOS technology for low power dissipation Special PVT Compensation circuitry to provide consistent performance over variations of process, supply voltage, and temperature 5V tolerant inputs and outputs on TTL ports TTL-compatible Driver and Control inputs High Output source/sink 24mA on TTL ports High Output sink +34mA on GTLP ports Open drain on GTLP to support wired-or connection Available in TSSOP package
DESCRIPTION:
The GTLP816 is a GTLP to TTL (1:6) and TTL to GTLP (1:2) clock driver with inverting outputs. The clock driver provides a high-speed interface between cards operating at TTL logic levels and back-planes operating at GTLP logic levels. GTLP provides reduced output swing (<1V), reduced input threshold levels, and output edge-rate control to minimize signal setting times. The GTLP816 is a derivative of the Gunning Transceiver Logic (GTL) JEDEC standard JESD8-3 and incorporates internal edge-rate control, which is process, voltage, and temperature (PVT) compensated. GTLP output low voltage is typically less than 0.5V. The output high is 1.5V, and the receiver threshold is 1V. The GTLP816 is available in Industrial Temperature Range (-40C to +85C). See Ordering Information for details.
FUNCTIONAL BLOCK DIAGRAM
OEB
OB0
TTLIN
OB1
OEA
OA0
OA1
OA2
GTLPIN
OA3
OA4
OA5
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
INDUSTRIAL TEMPERATURE RANGE
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c 2002 Integrated Device Technology, Inc.
JUNE 2002
DSC-5965/9
IDT74GTLP816 GTLP / TTL 1:2 / 1:6 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
PIN CONFIGURATION
ABSOLUTE MAXIMUM RATINGS(1,2)
Symbol VCC Rating Supply Voltage DC Input Voltage DC Output Voltage 3-State Active IOL IOH IOL IIK IOK TSTG DC Output Sink Current into OA DC Output Source Current from OA DC Output Sink Current into OB (in the LOW state) DC Input Diode Current VI < 0V VO > VCC Storage Temperature -50 -50 +50 -65 to +150 C mA mA DC Output Diode Current VO < 0V Max. -0.5 to +7 -0.5 to +7 -0.5 to +7 -0.5 to VCC + 0.5 64 -64 80 mA mA mA Unit V V V VCCT VI VO
TTLIN OA0 GNDT OA1 VCCT OA2 GNDT OA3 VCCT OA4 GNDT OA5
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
GNDT OEB OB0 GNDG VREF GNDG VCC OB1 GNDG GTLPIN OEA GNDT
NOTES: 1. Stresses greater than 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 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. 2. Unused inputs must be held HIGH or LOW.
TSSOP TOP VIEW
CAPACITANCE (TA = +25C, f = 1.0MHZ)
Symbol CIN COUT OAx OBx Parameter(1) Control Pins/GTLPIN/TTLIN Conditions VI = VCC or 0 VI = VCC or 0 VI = VCC or 0 Typ.(2) Max. Unit 3.7 7 7 -- -- -- pF pF pF
NOTES: 1. As applicable to the device type. 2. All typical values are at VCC, VCCT = 5V, TA = 25C
FUNCTION TABLE(1)
Inputs OEB L L H OEA L L H GTLPIN H L X TTLIN H L X L H Z Outputs OAx
(2)
PIN DESCRIPTION
Pin Names OBx L H Z TTLIN, GTLPIN OEB OEA VCCT GNDT VCC GNDG VREF OA[5:0] OB[1:0] Description Clock Inputs (TTL and GTLP) Clock Enable for GTLP Outputs. Set LOW for normal operation. Clock Enable for TTL Outputs. Set LOW for normal operation. Power Supply for TTL Clock Outputs Ground for TTL Clock Outputs Power Supply for Internal Circuitry Ground for GTLP Clock Outputs Voltage Reference Input TTL Clock Outputs (Inverted) GTLP Clock Outputs (Inverted)
NOTES: 1. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care Z = High Impedance 2. Output polarity is inverting.
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IDT74GTLP816 GTLP / TTL 1:2 / 1:6 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
RECOMMENDED OPERATING CONDITIONS(1)
Symbol VCC,VCCT VTT VI IOH IOL IOL TA Supply Voltage Bus Termination Voltage Input Voltage on TTLIN and Control Pins HIGH Level Output Current (OAx) LOW Level Output Current (OAx) LOW Level Output Current (OBx) Operating Temperature GTLP VREF Rating Min. 4.75 1.47 0.98 0 -- -- -- -40 -- -- -- -- +25 Typ. 5 Max. 5.25 1.53 1.02 5.5 -24 +24 +34 +85 V mA mA mA C Unit V V
NOTE: 1. Unused inputs must be held HIGH or LOW.
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: Industrial: TA = -40C to +85C; VREF = 1V; VCC, VCCT = 5V 5%
Symbol VIH VIL VREF VTT VIK VOH OAx Parameter GTLPIN All Others GTLPIN All Others GTLP GTL GTLP GTL VCC = Min, II = -18mA IOH = -100A VCC = Min IOH = -18mA IOH = -24mA IOL = 100A VOL VOL II IOFF IOZH IOZL ICC OAx OBx TTLIN/Control Pins GTLPIN TTLIN OAx OBx OAx OAx or OBx VCC = Max VCC = Max VI = VCC or GND ICC(2) TTLIN VCC = Max VCC = 0 VCC = Max VCC = Min VCC = Min VCC = Max IOL = 18mA IOL = 24mA IOL = 100A IOL = 34mA VI = 5.25V or 0V VI = VTT or 0V VI or VO = 0 to 5.25V VO = 5.25 V VO = 1.5V VO = 0 Outputs HIGH Outputs LOW Outputs Disabled VI = VCC - 2.1 Test Conditions Min. VREF+ 0.05 2 0 -- -- -- -- -- -- VCC-0.2 2.4 2.2 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- Typ.(1) -- -- -- -- 1 0.8 1.5 1.2 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 7 7 7 -- Max. VTT -- VREF- 0.05 0.8 -- -- -- -- -1.2 -- -- -- 0.2 0.4 0.5 0.2 0.65 5 5 100 5 5 -5 18 20 20 6 mA mA A A A A V V V V V V V Unit V
NOTES: 1. All typical values are at VCC, VCCT = 5V, and TA = 25C. 2. ICC is the increase in supply current for each input that is at the specified TTL voltage level rather than VCC or GND.
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IDT74GTLP816 GTLP / TTL 1:2 / 1:6 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
AC ELECTRICAL CHARACTERISTICS(1,2)
Symbol tPLH tPHL tPLH tPHL tPLH tPHL tR tF tR tF tSK(o) tPZH tPZL tPHZ tPLZ
NOTES: 1. See Test Circuits and Waveforms. 2. Unless otherwise noted, VREF = 1V, CL = 30pF for OBx, and CL = 50pF for OAx. 3. Typical values are at VCC, VCCT = 5V, and TA = 25C. 4. Skew specs are given for specific, worst case VCC temp. Skew values between the OBx outputs could vary on the backplane due to loading and impedance seen by the device.
Parameter TTLIN to OBx OEB to OBx GTLPIN to OAx OBx Output Rise Time (20% to 80%) OBx Output Fall Time (20% to 80%) OAx Output Rise Time (10% to 90%) OAx Output Fall Time (10% to 90%) Output Skew(4) OEA to OAx
Min. 1.5 1.5 1.5 1.5 1.5 1.5 -- -- -- -- -- 0.5 0.5
Typ.(3) 3.8 2.8 6.4 3.2 4.4 4 2.3 2.3 2 2 0.2 3.6 3.8
Max. 6 5 10.5 6 6.5 6 -- -- -- -- 1 6.5 6.5
Unit ns ns ns ns ns ns ns ns
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IDT74GTLP816 GTLP / TTL 1:2 / 1:6 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
FROM OUTPUT UNDER TEST
(1)
500
S
6V Open GND FROM OUTPUT UNDER TEST
1.5V (GTLP) 1.2V (GTL)
25
500
CL = 50pF
30pF
(1)
NOTE: 1. CL includes probes and jig capacitance.
NOTE: 1. CL includes probes and jig capacitance. CL = 30pF is used for worst case.
Test Circuit for OA Outputs
Test Circuit for OB Outputs
SWITCH POSITION
Test Open Drain Disable Low Enable Low Disable High Enable High All Other Tests Switch 6V GND Open
INPUT
5V for TTL, 1.5V for GTLP, 1.2V for GTL 1.5V for TTL, 1V for GTLP, 0.8V for GTL 0V
tPHL tPLH VOH OUTPUT Vm VOL
tSK(O) INPUT CONTROL 5V 1.5V tPZL OUTPUT WAVEFORM 1 tPZH OUTPUT WAVEFORM 2 VCC/2 VCC/2 tPHZ tPLZ 1.5V 0V VOH VOL + 0.3V VOL VOH VOH - 0.3V VOL tR, tF 80% OUTPUT Vm 20% VOL VOH
Voltage Waveforms Pulse Duration (Vm = VCC/2 for OAx and 1V for OBx )
Voltage Waveforms Enable and Disable Times (OAx)
NOTES: Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control. All input pulses have the following characteristics: frequency = 10 MHz, tR = tF = 2 ns, ZO = 50. The outputs are measured one at a time with one transition per measurement.
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IDT74GTLP816 GTLP / TTL 1:2 / 1:6 CLOCK DRIVER
INDUSTRIAL TEMPERATURE RANGE
ORDERING INFORMATION
IDT74GTLP XX XX XXX Device Type Package Process
I PG 816
-40C to +85C (Industrial) Thin Shrink Small Outline Package GTLP/TTL 1:2/1:6 Clock Driver
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for Tech Support: logichelp@idt.com (408) 654-6459
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