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74GTL1655
16 BIT LVTTL TO GTL/GTL + UNIVERSAL BUS TRANSCEIVERS WITH LIVE INSERTION
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HIGH SPEED GTL/GTL+ UNIVERSAL TRANSCEIVER : tPD = 4.6 ns (MAX.) A to B at VCC = 3V COMBINES D-TYPE LATCHES AND D-TYPE FLIP-FLOPS FOR OPERATION IN TRANSPARENT, LATCHED, OR CLOCKED MODE OPERATING VOLTAGE RANGE: VCC(OPR) = 3.0V to 3.6V SYMMETRICAL OUTPUT IMPEDANCE: |IOH| = IOL=24mA (MIN) at VCC = 3V (A PORT) OUTPUT IMPEDANCE: IOL = 100mA (MIN) at VCC = 3V (B PORT) HIGH-IMPEDANCE STATE DURING POWER UP AND POWER DOWN up to Vcc=1.5V PERMITT LIVE INSERTION B-PORT PRECHARGED BY BIASVcc REDUCE NOISE ON THE LINE DURING LIVE INSERTION EDGE RATE-CONTROL INPUT CONFIGURES THE B-PORT OUTPUT RISE AND FALL TIMES BUS HOLD ON DATA INPUTS ELIMINATES THE NEED FOR EXTERNAL PULL-UP/ PULL-DOWN RESISTORS (A PORT) DISTRIBUTED VCC AND GND PIN CONFIGURATION MINIMIZES HIGH-SPEED SWITCHING NOISE IN PARALLEL COMUNICATIONS . PIN AND FUNCTION COMPATIBLE WITH 74 SERIES 1655
TSSOP
ORDER CODES
PACKAGE TSSOP TUBE T &R 74GTL1655TTR
PIN CONNECTION
DESCRIPTION The 74GTL1655 devices are 16-bit high-drive (100mA), low-output-impedance universal bus transceivers designed for backplane applications. The 74GTL1655 devices provide live-insertion capability for backplane applications by tolerating active signals on the data ports when the devices are powered off. In addition, a biasing pin preconditions the GTL/GTL+ port to minimize disruption to an active backplane. The edge rate-control (VERC) input is provided so the rise and fall time of the B outputs can be configured to optimize for various backplane loading conditions. Data flow in each direction is controlled by output-enable (OEAB and OEBA),
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latch-enable (LEAB and LEBA), and clock (CLK) inputs. For A-to-B data flow, the devices operate in the transparent mode when LEAB is high. When LEAB is low, the A data is latched if CLK is held at a high or low logic level. If LEAB is low, the A data is stored in the latch/flip-flop on the low-to-high transition of CLK. When OEAB is low, the outputs are active. When OEAB is high, the outputs are in the high-impedance state. Data flow for B to A is similar to that of A to B, but uses OEBA, LEBA, and CLK. The output enable (OE) is used to disable both ports simultaneously. INPUT AND OUTPUT EQUIVALENT CIRCUIT Active bus-hold circuitry is provided on the A port to hold unused or floating data inputs at a valid logic level. When VCC is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down. However, to ensure the high-impedance state above 1.5V , OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. All input and output are equipped with protection circuits against static discharge, giving them 2KV ESD immunity and transient excess voltage.
PIN DESCRIPTION
PIN N 1, 2 4, 6, 7, 9, 11, 13, 14, 16 17, 19, 20, 22, 23, 25, 27, 29 31, 32 33 34, 35 36 37, 38, 40, 42, 43, 45, 46, 48 41 49, 51, 52, 54, 55, 56, 58, 59 61 62, 63 64 5, 8, 10, 12, 18, 21, 24, 26, 30, 39, 44, 47, 53, 57, 60 3, 15, 28, 50 2/14 SYMBOL 1OEAB, 1OEBA 1A1 to 1A8 2A1 to 2A8 2OEAB, 2OEBA OE 2LEBA, 2LEAB BIAS VCC 2B8 to 2B1 V REF 2A1 to 2A8 VERC 1LEBA, 1LEAB CLK GND VCC NAME AND FUNCTION Output Enable Input Data Inputs/Outputs LVTTL Data Inputs/Outputs LVTTL Output Enable Input Output Enable Input Latch Enable Pre-Charge Supply Voltage Data Inputs/Outputs GTL/GTL+ GTL Voltage Reference Input Data Inputs/Outputs GTL/GTL+ Edge Rate Control Latch Enable Clock Input (LOW to HIGH edge triggered) Ground (0V) Positive Supply Voltage
74GTL1655
FUNCTION TABLE (1)
INPUTS OEAB H L L L L L L LEAB X H H L L L L H L CLK X X X A X L H L H X X OUTPUT MODE B Z L H L H B0(2) B0
(3)
Isolation Transparent Transparent Registered Registered Previous State Previous State
1) A to B data flow is shown. B to A flow is similar, but uses OEBA, LEBA and CLK 2) Output level before the indicated steady-state input conditions were established, provided that CLK was high before LEAB went low 3) Output level before the indicated steady-state input conditions were established
OUTPUT ENABLE TRUTH TABLE
INPUTS OE L L L L H OEAB L L H H X OEBA L H L H X A PORT Active Z Active Z Z OUTPUTS B PORT Active Active Z Z Z
B-PORT EDGE RATE CONTROL (VERC) TRUTH TABLE
INPUT VERC LOGIC LEVEL H L NOMINAL VOLTAGE VCC GND Slow Fast OUTPUT B PORT EDGE RATE
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LOGIC DIAGRAM
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ABSOLUTE MAXIMUM RATINGS
Symbol VCC VIA VIB VOA VOB IIK IOK IOA IOB Tstg TL Supply Voltage, Bias VCC DC Input Voltage A Side, Control Input DC Input Voltage B Side, VERC , VREF DC Output Voltage A Side DC Output Voltage B Side DC Input Diode Current DC Output Diode Current DC Output Current A Side DC Output Current B Side in the Low State Storage Temperature Lead Temperature (10 sec) Parameter Value -0.5 to +4.6 -0.5 to +4.6 -0.5 to +4.6 -0.5 to +4.6 -0.5 to +4.6 - 50 - 50 48 200 -65 to +150 300 Unit V V V V V mA mA mA mA C C
Absolute Maximum Rating are those value beyond which damage to the device may occur. Functional operation under these condition is not implied
RECOMMENDED OPERATING CONDITIONS
Value Symbol VCC VTT VREF VI VIH V IL IIK IOH IOL dt/dVCC Top Supply Voltage Termination Voltage Supply Voltage Input Voltage High Level Input Voltage Low Level Input Voltage Input Clamp Current High Level Output Current Low Level Output Current Power -up ramp rate Operating Temperature A port A port B port 200 -40 85 GTL GTL+ GTL GTL+ B port other B port other B port other Parameter Min. 3.0 1.14 1.35 0.74 0.87 0 0 VREF+0.05 2 VREF-0.05 0.8 -18 -24 24 100 Typ. 3.3 1.2 1.5 0.8 1 Max. 3.6 1.26 1.65 0.87 1.1 VTT VCC V V V V V V mA mA mA s/V C Unit
1) VTT and RTT can be adjusted to adapt backplane impedance if DC raccomanded IOL ratings are not exceeded 2) VREF can be adjusted to optimaze noise margin (typ two-thirds VTT)
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DC SPECIFICATIONS
Test Condit ion Symbol Parameter VCC (V) 3 3 to 3.6 3 3 VOLA Low Level Ouput Voltage A Port 3 to 3.6 3 3 VOLB Low Level Ouput Voltage B Port 3 3 3 II Ioff II(HOLD) Input Current Control B Port Power Off Leakage Current Bus Hold A Port Input Current 3.6 3.6 0 3 3 3.6 IOZHB IOZLB IOZ (*) IOZPU IOZPD ICC ICC CI CO 3-State Port 3-State Port 3-State Port 3-State Port Output Current B Output Current B Output Current A Output Current A 3.6 3.6 3.6 0 to 1.5 1.5 to 0 3.6 IO=-100A IO=-12mA IO=-24mA IO=100A IO=12mA IO=24mA IO=40mA IO=80mA IO=100mA VI = VCC or GND VI = VTT or GND VI or VO = 0 to 3.6V VI = 0.8V V I = 2V VI = 0 to VCC VO = 1.5V VO = 0.4V V O = VCC or GND V O = 0.5 to 3V OE = LOW V O = 0.5 to 3V OE = LOW VI = VCC or GND IO =0 VIN = VCC or GND One input VCC =0.6V VIN = VCC or GND V O = VCC or GND 3 5 6 75 -75 500 10 -10 10 50 50 10 40 A A A A A mA V CC-0.2 2.4 2.2 0.2 0.4 0.55 0.2 0.4 0.5 10 10 100 20 A A A A V V V Value -40 to 85 C Min. Typ. Max. -1.2 V Unit
VIK VOHA
High Level Input Voltage High Level Ouput Voltage A Port
3-State Output Current A Port Quiescent Supply Current Supply Current except B port Control Input Capacitance Input Capacitance A Port Input Capacitance B Port
3.6
1 5 6 8
mA pF pF
(*) For I/O ports, the parameter IOZ includes the input leakage current
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74GTL1655
LIVE INSERTION SPECIFICATIONS
Test Condit ion Symbol Parameter VCC (V) 0 to 3.0 3 to 3.6 0 0 0 to 3.6 0 to 1.5 VO(Bport) = 0 to 1.2V V I(Bias Vcc) = 3 to 3.6V VI(Bias Vcc) = 3.3V V O(Bport) = 0.4V V I(Bias Vcc) = 3 to 3.6V OE = 3.3V OE = 0 to 3.3V 1 -1 100 100 Value -40 to 85 C Min. Typ. Max. 5 10 1.2 mA A V A A A Unit
ICC (Bias Quiescent Bias Current Vcc) VO IO Output Voltage B Port Output Current B Port
AC ELECTRICAL CHARACTERISTICS for GTL (VCC=3.3 0.3V, VTT=1.2V, VREF=0.8V, VERC=VCC or GND)
Value Symbol Parameter Test Condit ion Min. fMAX tPLH tPHL tPLH tPHL tPLH tPHL t EN tDIS tPLH tPHL tPLH tPHL tPLH tPHL t EN tDIS tPLH tPHL tPLH tPHL tPLH tPHL Maximum Frequency A to B or B to A Propagation Delay Time A to B Propagation Delay Time CK to B Propagation Delay Time LEAB to B Enable Delay Time OEAB or OE to B Disable Delay Time OEAB or OE to B Propagation Delay Time A to B Propagation Delay Time CK to B Propagation Delay Time LEAB to B Enable Delay Time OEAB or OE to B Disable Delay Time OEAB or OE to B Propagation Delay Time B to A Propagation Delay Time CK to A Propagation Delay Time LEBA to A VERC=VCC R1=12.5 CL=30pF VERC=VCC RL=12.5 CL=30pF VERC=VCC RL=12.5 CL=30pF VERC=VCC RL=12.5 CL=30pF 160 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 VERC=GND RL=12.5 C L=30pF VERC=GND RL=12.5 C L=30pF VERC=GND RL=12.5 C L=30pF VERC=GND RL=12.5 C L=30pF 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 RL=500 RL=500 RL=500 CL=50pF CL=50pF CL=50pF 1.5 1.5 1.5 1.5 1.5 1.5 5.2 6.2 5.5 5.8 5.8 6.4 5.4 6.2 4.3 4.6 4.3 4.9 4.9 4.8 4.8 4.2 4.7 4.8 4 4 4 3.7 ns ns -40 to 85 C Typ. Max. MHz ns ns ns Unit
ns ns ns
ns ns ns
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Value Symbol Parameter Test Condit ion Min. t EN tDIS t SU Enable Delay Time OEBA or OE to A Disable Delay Time OEBA or OE to A Set-up Time RL=500 R 1=500CL=50pF 1 1 Data before clock Data before LE Ck High Ck Low Data after clock Data after LE Ck High or LOW LE High CK High or Low VERC=VCC VERC=GND 2.7 2.8 2.6 0.4 0.9 3 3 1 1 1 1 -40 to 85 C Typ. Max. 4.6 6.1 ns Unit
ns
tH tW
Hold Time Pulse duration
ns ns ns/V ns
Slew rate Slew rate B output both transition (0.6 to 1.3V) tsk
Skew between drivers (in Switching in the same direction the same package) Switching in any direction
AC ELECTRICAL CHARACTERISTICS for GTL+ (VCC=3.3 0.3V, VTT=1.5V, VREF=1.0V, VERC=VCC or GND)
Value Symbol Parameter Test Condit ion Min. fMAX tPLH tPHL tPLH tPHL tPLH tPHL t EN tDIS tPLH tPHL tPLH tPHL tPLH tPHL t EN tDIS Maximum Frequency B to A or A to B Propagation Delay Time A to B Propagation Delay Time CK to B Propagation Delay Time LEAB to B Enable Delay Time OEAB or OE to B Disable Delay Time OEAB or OE to B Propagation Delay Time A to B Propagation Delay Time CK to B Propagation Delay Time LEAB to B Enable Delay Time OEAB or OE to B Disable Delay Time OEAB or OE to B VERC=VCC RL=12.5 CL=30pF VERC=VCC RL=12.5 CL=30pF VERC=VCC RL=12.5 CL=30pF VERC=VCC RL=12.5 CL=30pF 160 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 VERC=GND RL=12.5 C L=30pF VERC=GND RL=12.5 C L=30pF VERC=GND RL=12.5 C L=30pF VERC=GND RL=12.5 C L=30pF 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 5.1 6.5 5.4 6.2 5.7 6.7 5.5 5.8 4.3 4.9 4.0 5.5 4.0 5.4 5.1 4.9 ns ns -40 to 85 C Typ. Max. MHz ns ns ns Unit
ns ns ns
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Value Symbol Parameter Test Condit ion Min. tPLH tPHL tPLH tPHL tPLH tPHL t EN Propagation Delay Time B to A Propagation Delay Time CK to A Propagation Delay Time LEBA to A RL=500 RL=500 RL=500 CL=50pF CL=50pF CL=50pF 1.5 1.5 1.5 1.5 1.5 1.5 RL=500 R 1=500CL=50pF 1 1 VERC=VCC RL=12.5 CL=30pF 3 3 2.7 2.8 2.6 0.4 0.9 1 1 -40 to 85 C Typ. Max. 4.8 4.7 4.4 4.1 4 3.7 4.2 6.1 1 1 ns ns ns ns Unit
Enable Delay Time OEBA or OE to A Disable Delay Time tDIS OEBA or OE to A Slew rate Slew rate B output both transition (0.6 to 1.3V) tW t SU
tH tsk
VERC=GND RL=12.5 C L=30pF Pulse duration LE High CK High or Low Set-up Time Data before clock Data before LE Ck High Ck Low Hold Time Data after clock Data after LE Ck High or LOW Skew between drivers (in Switching in the same direction the same package) Switching in any direction
ns/V ns
ns
ns ns
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TEST CIRCUIT FOR "A" OUTPUTS
Test tPLH, tPHL tPZL, tPLZ tPZH, tPHZ
C L = 50pF or equivalent (includes jig and probe capacitance) R L = R1 = 500 or equivalent R T = ZOUT of pulse generator (typically 50) tr=tf <=2.5ns
Switch Open 6V GND
TEST CIRCUIT FOR "B" OUTPUTS
C L = 30pF or equivalent (includes jig and probe capacitance) R L = R1 = 12.5 or equivalent R T = ZOUT of pulse generator (typically 50) tr=tf <=2.5ns
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WAVEFORM 1: PULSE DURATION (A PORT, CONTROL PIN)
WAVEFORM 2: CLOCK TO B PORT PROPAGATION DELAY TIME
WAVEFORM 3: CLOCK TO A PORT PROPAGATION DELAY TIME
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WAVEFORM 4: SETUP AND HOLD TIME
WAVEFORM 4: ENABLE AND DISABLE TIME (A PORT)
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TSSOP64 MECHANICAL DATA
mm. DIM. MIN. A A1 A2 b c D E E1 e K L 0 0.50 6.0 0.5 BSC 8 0.75 0 0.020 0.17 0.09 16.9 8.1 6.2 0.236 0.0197 BSC 8 0.030 0.05 0.9 0.27 0.20 17.1 0.0067 0.0035 0.665 0.318 0.244 TYP MAX. 1.1 0.15 0.002 0.035 0.011 0.0079 0.673 MIN. TYP. MAX. 0.043 0.006 inch
A
A2 A1 b e K c L E
D
E1
PIN 1 IDENTIFICATION
1 7187824A
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Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. (c) The ST logo is a registered trademark of STMicroelectronics (c) 2001 STMicroelectronics - Printed in Italy - All Rights Reserved STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. (c) http://www.st.com
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